Create controls during runtime and access their values - c#

I'm trying to create CheckedListBox's at runtime from the data that is in a database table.
Data in the table for example
Kern
Formax
Buhrs
for each row in the table I want the code to create a new CheckedListBox with a name of the row.
After the creating of the CheckedListBox I want to populate it from another table containing other data.
As soon as the client is done with the data selection in the CheckedListBox's I want to read all the checked values in the CheckedListBox's and save it into an array.
My trouble comes with creating the CheckedListBox's and accessing the data as soon as the client clicks done.
I'm very new to creating controls at runtime.
Thanks in advance:)
I have solved this by creating an array of checkedlistboxs, and by creating each checkedlistbox with the ammount of rows in my table, and by populating the checkedlistboxs with the data in the table. By itterating through all pf the checkedlistboxs i get all of the values that is checked and store them into another table.
private CheckedListBox[] Machines;
Machines = new CheckedListBox[test.Length];
int iLocation = 3;
for (int i = 0; i < Machines.Length; i++)
{
Machines[i] = new CheckedListBox();
Machines[i].Name = "clb" + test[i].ToString();
Machines[i].Location = new Point(iLocation, 6);
Machines[i].Size = new Size(120, 139);
iLocation += Machines[i].Width + 6;
this.Controls.Add(Machines[i]);
}
Machines[2].Items.Add("Hello");
Machines[2].Items.Add("Goodbye");
This code is for accessing data in the checked list box
ArrayList arrCheckedItems = new ArrayList();
CheckedListBox.CheckedItemCollection objCheckedItem = Machines[2].CheckedItems;
for (int i = 0; i < objCheckedItem.Count; i++)
{
arrCheckedItems.Add(objCheckedItem[i]);
}
string[] srtArray = arrCheckedItems.ToArray(Type.GetType("System.String")) as string[];
int iMachines = srtArray.Count();
for (int i = 0; i < iMachines; i++)
{
MessageBox.Show(srtArray[i].ToString());
}


if i understand this correctly, you have 2 types of entities ... lets call them T1 and T2
now you want to add one control to your form for every T1 entity that enables you to associate T2 entities to T1 entities, and that control should be a CheckedListBox ...
well, here is a quick and dirty example form that does this:
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
namespace controlsAtRuntime
{
public class Form1 : Form
{
private FlowLayoutPanel mainPanel;
private Button button1;
private Button button2;
private Button button3;
MyDataClass1[] T1Items = new MyDataClass1[] { new MyDataClass1 { Name = "I am element 1" }, new MyDataClass1 { Name = "I am element 2" } };
MyDataClass2[] T2Items = new MyDataClass2[] { new MyDataClass2 { Name = "Foo" }, new MyDataClass2 { Name = "Bar" } };
public Form1()
{
InitializeComponent();
}
private void setUpControlsAtRuntime()
{
mainPanel.Controls.Clear();
foreach (var item in T1Items)
{
mainPanel.Controls.Add(getControlForT1Entity(item, T2Items));
}
}
private GroupBox getControlForT1Entity(MyDataClass1 entity,IEnumerable<MyDataClass2> asscociatableData)
{
GroupBox box = new GroupBox();//outer element that can give our checked list box a visible name
box.Text = entity.Name;
box.Tag = entity; // so you can know the entity this box belongs to ...
box.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
box.AutoSize = true;
CheckedListBox chklb = new CheckedListBox();
foreach (var item in asscociatableData)
{
chklb.Items.Add(item, entity.associatedData != null && entity.associatedData.Contains(item));
//add all items, and check them if they were contained in entity.associatedData
}
box.Controls.Add(chklb);
chklb.Location = new Point(10, 20);
return box;
}
private IEnumerable<MyDataClass2> getCheckedItemsFromOuterBox(GroupBox box)
{
var chklb = box.Controls[0] as CheckedListBox;
if (chklb != null)
{
return chklb.CheckedItems.OfType<MyDataClass2>();
}
throw new Exception("whoops... that was none of the expected GroupBox Controls...");
}
private void InitializeComponent()
{
this.mainPanel = new System.Windows.Forms.FlowLayoutPanel();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// mainPanel
//
this.mainPanel.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.mainPanel.Location = new System.Drawing.Point(12, 12);
this.mainPanel.Name = "mainPanel";
this.mainPanel.Size = new System.Drawing.Size(417, 269);
this.mainPanel.TabIndex = 0;
//
// button1
//
this.button1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
this.button1.Location = new System.Drawing.Point(330, 287);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(99, 23);
this.button1.TabIndex = 0;
this.button1.Text = "save selection";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(12, 287);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(75, 23);
this.button2.TabIndex = 1;
this.button2.Text = "clear panel";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(93, 287);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(75, 23);
this.button3.TabIndex = 2;
this.button3.Text = "setup panel";
this.button3.UseVisualStyleBackColor = true;
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// Form1
//
this.ClientSize = new System.Drawing.Size(441, 322);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.mainPanel);
this.Name = "Form1";
this.ResumeLayout(false);
}
private void button1_Click(object sender, EventArgs e)
{
foreach (var item in mainPanel.Controls.OfType<GroupBox>().Where(x=>x.Tag is MyDataClass1))
{
var entity = item.Tag as MyDataClass1;
entity.associatedData = getCheckedItemsFromOuterBox(item);
}
}
private void button2_Click(object sender, EventArgs e)
{
mainPanel.Controls.Clear();
}
private void button3_Click(object sender, EventArgs e)
{
setUpControlsAtRuntime();
}
}
public class MyDataClass1
{
public String Name { get; set; }
public IEnumerable<MyDataClass2> associatedData { get; set; }
}
public class MyDataClass2
{
public String Name { get; set; }
public override string ToString()
{
return Name;
}
}
}

Related

Windows forms - The name "dataGridView2" doesn't exist in this context

The problem is "The name "dataGridView2" doesn't exist in this context.". It only appears at the final parts of the code. Placing the object creation outside of public void menuItem1_Click fixes the problem, but then it only creates one object, I need it to create an object every time a button is pressed.
Here is the code from Form1:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Kalkulator_Matrica
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
int brojMatrice = 1;
public int dataGridCreator = 0;
public void menuItem1_Click(object sender, EventArgs e)
{
// opens form2 with new matrix
Form2 novaMatrica = new Form2();
using (var form = new Form2())
{
var result = form.ShowDialog();
if (result == DialogResult.OK)
{
int column = form.ReturnValue1;
int row = form.ReturnValue2;
//Create tab
TabPage tpage = new TabPage("Matrica " + brojMatrice);
tabControl1.TabPages.Add(tpage);
//Create data grid
DataGridView dataGridView2 = new DataGridView();
dataGridView2.ClientSize = new Size(553, 350);
dataGridView2.AllowUserToAddRows = false;
dataGridView2.AllowUserToResizeColumns = false;
dataGridView2.AllowUserToResizeRows = false;
dataGridView2.ColumnHeadersVisible = false;
dataGridView2.RowHeadersVisible = false;
dataGridView2.ColumnCount = column;
dataGridView2.RowCount = row;
this.AutoSize = true;
tpage.Controls.Add(dataGridView2); //Add grid to tab
//Create matrix name label
Label imeMatrice = new Label();
imeMatrice.Location = new Point(620, 10);
imeMatrice.Size = new Size(100, 20);
imeMatrice.Font = new Font("Microsoft Sans Serif", 15);
imeMatrice.Text = "Matrica " + brojMatrice;
tpage.Controls.Add(imeMatrice);
//Create matrix data label
Label dataMatrice = new Label();
dataMatrice.Location = new Point(637, 35);
dataMatrice.Size = new Size(100, 20);
dataMatrice.Font = new Font("Microsoft Sans Serif", 15);
dataMatrice.Text = dataGridView2.RowCount + " x " + dataGridView2.ColumnCount;
tpage.Controls.Add(dataMatrice);
//Povecamo counter za imena matrica
brojMatrice += 1;
//Create button ADD ROW
Button addRow = new Button();
addRow.Location = new Point(557, 70);
addRow.Size = new Size(107, 40);
addRow.Text = "Dodaj redak";
addRow.Click += new EventHandler(addRowClick);
tpage.Controls.Add(addRow);
//Create button REMOVE ROW
Button removeRow = new Button();
removeRow.Location = new Point(663, 70);
removeRow.Size = new Size(107, 40);
removeRow.Text = "Izbrisi redak";
removeRow.Click += new EventHandler(removeRowClick);
tpage.Controls.Add(removeRow);
//Create button ADD COLUMN
Button addColumn = new Button();
addColumn.Location = new Point(557, 110);
addColumn.Size = new Size(107, 40);
addColumn.Text = "Dodaj stupac";
addColumn.Click += new EventHandler(addColumnClick);
tpage.Controls.Add(addColumn);
//Create button REMOVE COLUMN
Button removeColumn = new Button();
removeColumn.Location = new Point(663, 110);
removeColumn.Size = new Size(107, 40);
removeColumn.Text = "Izbrisi stupac";
removeColumn.Click += new EventHandler(removeColumnClick);
tpage.Controls.Add(removeColumn);
//Sets widght of all columns
for (int i = 0; i < column; i = i + 1)
{
dataGridView2.Columns[i].Width = 25;
}
dataGridCreator = dataGridCreator + 1;
}
}
}
private void addRowClick(object sender, EventArgs e)
{
dataGridView2.RowCount = dataGridView2.RowCount + 1;
}
private void removeRowClick(object sender, EventArgs e)
{
if (dataGridView2.RowCount > 1) {
dataGridView2.RowCount = dataGridView2.RowCount - 1;
}
}
private void addColumnClick(object sender, EventArgs e)
{
dataGridView2.ColumnCount = dataGridView2.ColumnCount + 1;
for (int i = 0; i < dataGridView2.ColumnCount; i = i + 1)
{
dataGridView2.Columns[i].Width = 25;
}
}
private void removeColumnClick(object sender, EventArgs e)
{
if (dataGridView2.ColumnCount > 1)
{
dataGridView2.ColumnCount = dataGridView2.ColumnCount - 1;
}
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}

Use like below, it will create new object every time but name of the variable will be same through out the code and it accessible in the context as well.
int brojMatrice = 1;
public int dataGridCreator = 0;
DataGridView dataGridView2;
public void menuItem1_Click(object sender, EventArgs e)
{
//Create data grid
dataGridView2 = new DataGridView();
}

Remove Row inside TableLayoutPanel makes a layout problem

I have a WinForms application that has a TableLayoutPanel; this is the definition code:
tableLayoutPanel1 = new TableLayoutPanel();
tableLayoutPanel1.Dock = DockStyle.Fill;
tableLayoutPanel1.AutoScroll = true;
tableLayoutPanel1.RowCount = users.Count + 1;
tableLayoutPanel1.ColumnCount = 1;
tableLayoutPanel1.GrowStyle = TableLayoutPanelGrowStyle.FixedSize;
tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100F));
foreach (String user in users)
{
tableLayoutPanel1.RowStyles.Add(new RowStyle(SizeType.Absolute, 600F));
}
tableLayoutPanel1.RowStyles.Add(new RowStyle(SizeType.Absolute, 600F));
int index = 0;
foreach (String user in users)
{
AddDockedControl(index, user);
index++;
}
AddDockedControl(index, null);
panel1.Controls.Add(tableLayoutPanel1);
private void AddDockedControl(int row, String userName)
{
AccountRowUC newUser = new AccountRowUC(this, userName, row);
newUser.BorderStyle = BorderStyle.FixedSingle;
newUser.Dock = DockStyle.Top;
tableLayoutPanel1.Controls.Add(newUser, 0, row);
}
Now, when I want to remove one of the rows, I'm using this code:
public void RemoveRowAtIndex(int index)
{
if (index >= tableLayoutPanel1.RowCount)
return;
// delete all controls of row that we want to delete
for (int i = 0; i < tableLayoutPanel1.ColumnCount; i++)
{
var control = tableLayoutPanel1.GetControlFromPosition(i, index);
tableLayoutPanel1.Controls.Remove(control);
}
// move up row controls that comes after row we want to remove
for (int i = index + 1; i < tableLayoutPanel1.RowCount; i++)
{
for (int j = 0; j < tableLayoutPanel1.ColumnCount; j++)
{
var control = tableLayoutPanel1.GetControlFromPosition(j, i);
if (control != null)
tableLayoutPanel1.SetRow(control, i - 1);
}
}
// remove last row
tableLayoutPanel1.RowStyles.RemoveAt(tableLayoutPanel1.RowCount - 1);
//tableLayoutPanel1.RowStyles.RemoveAt(index);
tableLayoutPanel1.RowCount--;
}
The problem is that when I remove a Row, a big space is left at the bottom of the table: the TableLayoutPanel won't reclaim the size of panel1.

A solution base on the layout described in the comments and this answer, previously posted:
Center multiple rows of controls in a FlowLayoutPanel
Description:
(Full code of a test Form provided at bottom of this post)
Create a new Form (here, named frmTLPTest1)
Add two Panels. One is used to host some buttons, the other one will be the Container of a TableLayoutPanel.
Set the Container panel to AutoScroll = true, AutoSizeMode = AutoSizeMode.GrowAndShrink, set all the Anchors (Left, Top, Right, Bottom)
Inside the Container panel, drop a new TableLayoutPanel: set it to AutoSize = true, AutoSizeMode = AutoSizeMode.GrowAndShrink, Dock = DockStyle.Top
Remove all Rows and Columns from the TableLayoutPanel except one of each (you cannot remove all). Set the dimensions of both to AutoSize.
Important note (also reported in the linked answer):
In the Form constructor, one of the RowStyles is removed. This is
important: the TLP will keep 2 RowStyles. One is applied to the
existing Row; the second style will be applied to the first Row you
add: to the first one only, not the others. If this style is not
removed, it will compromise the layout.
The core methods used to Add Rows to/Remove Rows from the TableLayoutPanel, make use of a FlowLayoutPanel as the TLP Row content and can also be used as Container of other controls, eventually.
TlpAddRow(TableLayoutPanel tlp, bool addRowCount) method:
Adds a new FlowLayoutPanel to the Cell of the TableLayoutPanel specified and adds a new Row if requested.
Since the Designer won't allow to remove all the Rows, the First Row (FlowLayoutPanel) must not increment the Rows count: the addRowCount argument will be set to false.
private Control TlpAddRow(TableLayoutPanel tlp, bool addRowCount)
{
var flp = new FlowLayoutPanel() {
Anchor = AnchorStyles.Top | AnchorStyles.Bottom,
AutoSize = true,
AutoSizeMode = AutoSizeMode.GrowAndShrink,
};
tlp.SuspendLayout();
if (addRowCount) tlp.RowCount += 1;
tlp.Controls.Add(flp, 0, tlp.RowCount - 1);
tlp.ResumeLayout(true);
return flp;
}
TLPRemoveRow(TableLayoutPanel tlp, Control control) method (overloaded):
Allows to remove a Row from the specified TableLayoutPanel. The Row to be removed can be derived from the Control that is used as the Row Container (a FlowLayoutPanel, here, but it could be a Panel, another TableLayoutPanel, or some other type of Container control).
The Row can also be removed by directly specifying the Row index.
private void TLPRemoveRow(TableLayoutPanel tlp, Control control)
{
int ctlRow = tlp.GetRow(control);
TLPRemoveRow(tlp, ctlRow);
}
private void TLPRemoveRow(TableLayoutPanel tlp, int row)
{
if (row < tlp.RowCount - 1) {
for (int i = row; i < tlp.RowCount - 1; i++) {
tlp.SetRow(tlp.GetControlFromPosition(0, i + 1), i);
}
}
tlp.RowCount -= 1;
}
Visual results of this Layout:
Since it's easier to understand how it work by testing rather than explaining, here's the full layout of the Form:
Test Form (frmTLPTest1):
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
public partial class frmTLPTest1 : Form
{
public frmTLPTest1()
{
InitializeComponent();
tlp1.RowStyles.RemoveAt(1);
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
TlpAddRow(tlp1, false);
}
Random rnd = new Random();
Size[] sizes = new Size[] { new Size(75, 75), new Size(100, 100), new Size(125, 125)};
Color[] colors = new Color[] { Color.Red, Color.LightGreen, Color.YellowGreen, Color.SteelBlue };
Control selectedObject = null;
Control selectedParent = null;
private void btnAddControl_Click(object sender, EventArgs e)
{
Size size = new Size(125, 125);
if (chkRandom.Checked) size = sizes[rnd.Next(sizes.Length)];
var pBox = new PictureBox() {
Anchor = AnchorStyles.None,
BackColor = colors[rnd.Next(colors.Length)],
MinimumSize = size,
Size = size
};
bool drawborder = false;
pBox.MouseEnter += (s, evt) => { drawborder = true; pBox.Invalidate(); };
pBox.MouseLeave += (s, evt) => { drawborder = false; pBox.Invalidate(); };
pBox.MouseDown += (s, evt) => { selectedParent = pBox.Parent;
selectedObject = pBox; pBox.Invalidate();
};
pBox.Paint += (s, evt) => {
if (drawborder) {
ControlPaint.DrawBorder(evt.Graphics, pBox.ClientRectangle,
Color.White, ButtonBorderStyle.Solid);
}
};
if (tlp1.RowCount == 0) TlpAddRow(tlp1, true);
var ctl = tlp1.GetControlFromPosition(0, tlp1.RowCount - 1);
int overallWith = 0;
if (ctl.Controls?.Count > 0) {
overallWith = ctl.Controls.OfType<Control>().Sum(c => c.Width + c.Margin.Left + c.Margin.Right);
}
overallWith += ctl.Margin.Right + ctl.Margin.Left + pBox.Size.Width + pBox.Margin.Left + pBox.Margin.Right;
if (overallWith >= tlp1.Width) {
ctl = TlpAddRow(tlp1, true);
}
ctl.Controls.Add(pBox);
}
private void btnRemoveRow_Click(object sender, EventArgs e)
{
if (selectedParent is null) return;
if (selectedParent.Controls.Count > 0) {
for (int i = 0; i == selectedParent.Controls.Count - 1; i++) {
selectedParent.Controls[i].Dispose();
}
}
TLPRemoveRow(tlp1, selectedParent);
selectedParent.Dispose();
}
private void btnRemoveControl_Click(object sender, EventArgs e)
{
if (selectedObject is null) return;
Control parent = selectedObject.Parent;
selectedObject.Dispose();
if (parent?.Controls.Count == 0) {
TLPRemoveRow(tlp1, parent);
parent.Dispose();
}
}
private Control TlpAddRow(TableLayoutPanel tlp, bool addRowCount)
{
var flp = new FlowLayoutPanel() {
Anchor = AnchorStyles.Top | AnchorStyles.Bottom,
AutoSize = true,
AutoSizeMode = AutoSizeMode.GrowAndShrink,
};
tlp.SuspendLayout();
if (addRowCount) tlp.RowCount += 1;
tlp.Controls.Add(flp, 0, tlp.RowCount - 1);
tlp.ResumeLayout(true);
return flp;
}
private void TLPRemoveRow(TableLayoutPanel tlp, Control control)
{
int ctlRow = tlp.GetRow(control);
TLPRemoveRow(tlp, ctlRow);
}
private void TLPRemoveRow(TableLayoutPanel tlp, int row)
{
if (row < tlp.RowCount - 1) {
for (int i = row; i < tlp.RowCount - 1; i++) {
tlp.SetRow(tlp.GetControlFromPosition(0, i + 1), i);
}
}
tlp.RowCount -= 1;
}
}
Test Form Designer:
partial class frmTLPTest1
{
private System.ComponentModel.IContainer components = null;
protected override void Dispose(bool disposing)
{
if (disposing && (components != null)) {
components.Dispose();
}
base.Dispose(disposing);
}
private void InitializeComponent()
{
this.panToolbar = new System.Windows.Forms.Panel();
this.btnRemoveRow = new System.Windows.Forms.Button();
this.chkRandom = new System.Windows.Forms.CheckBox();
this.btnRemoveControl = new System.Windows.Forms.Button();
this.btnAddControl = new System.Windows.Forms.Button();
this.panBackground = new System.Windows.Forms.Panel();
this.tlp1 = new System.Windows.Forms.TableLayoutPanel();
this.panToolbar.SuspendLayout();
this.panBackground.SuspendLayout();
this.SuspendLayout();
//
// panToolbar
//
this.panToolbar.BackColor = System.Drawing.Color.DarkOliveGreen;
this.panToolbar.Controls.Add(this.btnRemoveRow);
this.panToolbar.Controls.Add(this.chkRandom);
this.panToolbar.Controls.Add(this.btnRemoveControl);
this.panToolbar.Controls.Add(this.btnAddControl);
this.panToolbar.Dock = System.Windows.Forms.DockStyle.Bottom;
this.panToolbar.Location = new System.Drawing.Point(0, 359);
this.panToolbar.Name = "panToolbar";
this.panToolbar.Size = new System.Drawing.Size(552, 55);
this.panToolbar.TabIndex = 2;
//
// btnRemoveRow
//
this.btnRemoveRow.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(32)))), ((int)(((byte)(32)))), ((int)(((byte)(32)))));
this.btnRemoveRow.FlatAppearance.MouseDownBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
this.btnRemoveRow.FlatAppearance.MouseOverBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
this.btnRemoveRow.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.btnRemoveRow.ForeColor = System.Drawing.Color.White;
this.btnRemoveRow.Location = new System.Drawing.Point(261, 11);
this.btnRemoveRow.Name = "btnRemoveRow";
this.btnRemoveRow.Size = new System.Drawing.Size(119, 34);
this.btnRemoveRow.TabIndex = 4;
this.btnRemoveRow.Text = "Remove Row";
this.btnRemoveRow.UseVisualStyleBackColor = false;
this.btnRemoveRow.Click += new System.EventHandler(this.btnRemoveRow_Click);
//
// chkRandom
//
this.chkRandom.AutoSize = true;
this.chkRandom.ForeColor = System.Drawing.Color.White;
this.chkRandom.Location = new System.Drawing.Point(446, 20);
this.chkRandom.Name = "chkRandom";
this.chkRandom.Size = new System.Drawing.Size(94, 19);
this.chkRandom.TabIndex = 3;
this.chkRandom.Text = "Random Size";
this.chkRandom.UseVisualStyleBackColor = true;
//
// btnRemoveControl
//
this.btnRemoveControl.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(32)))), ((int)(((byte)(32)))), ((int)(((byte)(32)))));
this.btnRemoveControl.FlatAppearance.MouseDownBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
this.btnRemoveControl.FlatAppearance.MouseOverBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
this.btnRemoveControl.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.btnRemoveControl.ForeColor = System.Drawing.Color.White;
this.btnRemoveControl.Location = new System.Drawing.Point(136, 11);
this.btnRemoveControl.Name = "btnRemoveControl";
this.btnRemoveControl.Size = new System.Drawing.Size(119, 34);
this.btnRemoveControl.TabIndex = 2;
this.btnRemoveControl.Text = "Remove Control";
this.btnRemoveControl.UseVisualStyleBackColor = false;
this.btnRemoveControl.Click += new System.EventHandler(this.btnRemoveControl_Click);
//
// btnAddControl
//
this.btnAddControl.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(32)))), ((int)(((byte)(32)))), ((int)(((byte)(32)))));
this.btnAddControl.FlatAppearance.MouseDownBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
this.btnAddControl.FlatAppearance.MouseOverBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
this.btnAddControl.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.btnAddControl.ForeColor = System.Drawing.Color.White;
this.btnAddControl.Location = new System.Drawing.Point(11, 11);
this.btnAddControl.Name = "btnAddControl";
this.btnAddControl.Size = new System.Drawing.Size(119, 34);
this.btnAddControl.TabIndex = 0;
this.btnAddControl.Text = "Add Control";
this.btnAddControl.UseVisualStyleBackColor = false;
this.btnAddControl.Click += new System.EventHandler(this.btnAddControl_Click);
//
// panBackground
//
this.panBackground.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.panBackground.AutoScroll = true;
this.panBackground.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
this.panBackground.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(32)))), ((int)(((byte)(32)))), ((int)(((byte)(32)))));
this.panBackground.Controls.Add(this.tlp1);
this.panBackground.Location = new System.Drawing.Point(0, 0);
this.panBackground.Name = "panBackground";
this.panBackground.Size = new System.Drawing.Size(552, 360);
this.panBackground.TabIndex = 3;
//
// tlp1
//
this.tlp1.AutoSize = true;
this.tlp1.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
this.tlp1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(32)))), ((int)(((byte)(32)))), ((int)(((byte)(32)))));
this.tlp1.CellBorderStyle = System.Windows.Forms.TableLayoutPanelCellBorderStyle.Single;
this.tlp1.ColumnCount = 1;
this.tlp1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
this.tlp1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 20F));
this.tlp1.Dock = System.Windows.Forms.DockStyle.Top;
this.tlp1.Location = new System.Drawing.Point(0, 0);
this.tlp1.Name = "tlp1";
this.tlp1.RowCount = 1;
this.tlp1.RowStyles.Add(new System.Windows.Forms.RowStyle());
this.tlp1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 1F));
this.tlp1.Size = new System.Drawing.Size(552, 2);
this.tlp1.TabIndex = 4;
//
// frmTLPTest1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
this.ClientSize = new System.Drawing.Size(552, 414);
this.Controls.Add(this.panBackground);
this.Controls.Add(this.panToolbar);
this.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.Name = "frmTLPTest1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "frmTLPTest1";
this.Load += new System.EventHandler(this.SOfrmTest1_Load);
this.panToolbar.ResumeLayout(false);
this.panToolbar.PerformLayout();
this.panBackground.ResumeLayout(false);
this.panBackground.PerformLayout();
this.ResumeLayout(false);
}
private System.Windows.Forms.Panel panToolbar;
private System.Windows.Forms.Button btnAddControl;
private System.Windows.Forms.Button btnRemoveControl;
private System.Windows.Forms.CheckBox chkRandom;
private System.Windows.Forms.Panel panBackground;
private System.Windows.Forms.TableLayoutPanel tlp1;
private System.Windows.Forms.Button btnRemoveRow;
}

Head First C# Lab1 A Day at the Races called method not executing

I have a problem with the greyhound application that I have created. when I use the radio button to select who is placing a bet (Say Bob) and put his bet amount to 10 on dog number 4, (see image #1) when I click Bets, to update the 'Bob hasnt placed any bets' label with the description() method I get an error (see image #2)
What should happen is where it says "bob hasnt placed any bets" it should now read "bob bets 10 bucks on dog # 4. I have established this is failing due to the bettor returning NULL, but I cannot work out why this is when Bettor is referencing the Guy class which contains the bettor's name.
On a side notem when the race finishes and if Bob wins, he is note getting paid so either the PayOut() or Collect() methods are not working either.
Below are my 3 classes and my Form1.cs
Greyhound.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Drawing;
using System.Windows.Forms;
namespace A_Day_at_the_Races
{
public class Greyhound
{
public int StartingPosition; //Where my PictureBox starts
public int RacetrackLength; // How long the racetrack is
public PictureBox MyPictureBox = null; //My PictureBox object
public int Location = 0; // My Location on the racetrack
public Random Randomizer; // An instance of Random
public bool Run()
{
//1. Move forward either 1,2,3 or 4 spaces at random
int moveforward = Randomizer.Next(1, 4); // declare an int called 'moveforward' will move forward 1,2,3 or 4 spaces at random
//2. Update the position of my PictureBox on the form
Point p = MyPictureBox.Location; // current location of the picture of the greyhound
p.X += moveforward;
MyPictureBox.Location = p;
//3. Return true if I won the race
if (p.X >= RacetrackLength)
return true;
else
return false;
}
public void TakeStartingPosition()
{
//Reset my location to the start line
//MyPictureBox.Location.X = StartingPosition;
StartingPosition = 0;
}
}
}
Guy.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace A_Day_at_the_Races
{
public class Guy
{
public string Name; // The guy's name
public Bet MyBet = null; // An instance of bet() that has how much he's betting
public int Cash; // How much cash he has
// these last two fields are the guy's GUI controls on the form
public RadioButton MyRadioButton; // My RadioButton
public Label MyLabel; // My Label
public void UpdateLabels()
{
//1.Set my label to my bet's description,
if (MyBet == null)
MyLabel.Text = Name + " hasnt placed any bets";
else
MyLabel.Text = MyBet.GetDescription();
//2.Set the label on my radio button to show my cash ("Joe has 43 dollars")
MyRadioButton.Text = Name + " has " + Cash + " bucks";
}
public void ClearBet()
{
//1.Reset my bet so it's zero
MyBet = null;
}
//1.Place a new bet and store it in my bet field
//2.Return true if the guy had enough money to bet
public bool PlaceBet(int Amount, int Dog)
{
this.MyBet = new Bet();
if (Cash >= Amount)
{
Cash = Cash - Amount;
MyLabel = new Label();
MyBet.Amount = Amount;
MyBet.Dog = Dog;
UpdateLabels();
return true;
}
else
{
return false;
}
}
public void Collect(int Winner)
{
if (MyBet != null)
//1.Ask my bet to pay out (hint use the bet object to do the work)
Cash += MyBet.PayOut(Winner);
}
}
}
Bet.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace A_Day_at_the_Races
{
public class Bet
{
public int Amount; // The amount of cash that was bet
public int Dog; // The number of the dog the bet is on
public Guy Bettor; // The guy who placed the bet
public string GetDescription()
{
if (Amount > 0)
return Bettor.Name + " bets " + Amount + " bucks on dog #" + Dog;
else
return Bettor.Name + " hasnt placed a bet";
}
public int PayOut(int Winner)
{
if (Winner == Dog)
return Amount;
else
return -1 * Amount;
}
}
}
Form1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace A_Day_at_the_Races
{
public partial class Form1 : Form
{
Guy[] Bettors;
Greyhound[] Dogs;
Guy CurrentBettor;
public Form1()
{
InitializeComponent();
Random Randomizer = new Random();
//initialise all my guys and dogs
Bettors = new Guy[3];
Dogs = new Greyhound[4];
//guys
Bettors[0] = new Guy();
Bettors[0].Name = "Joe";
Bettors[0].MyRadioButton = joeRadioButton;
Bettors[0].MyLabel = joeBetLabel;
Bettors[0].Cash = 50;
Bettors[0].UpdateLabels();
Bettors[1] = new Guy();
Bettors[1].Name = "Bob";
Bettors[1].MyRadioButton = bobRadioButton;
Bettors[1].MyLabel = bobBetLabel;
Bettors[1].Cash = 75;
Bettors[1].UpdateLabels();
Bettors[2] = new Guy();
Bettors[2].Name = "Al";
Bettors[2].MyRadioButton = alRadioButton;
Bettors[2].MyLabel = alBetLabel;
Bettors[2].Cash = 45;
Bettors[2].UpdateLabels();
int StartPosition = pictureBoxDog1.Location.X;
int distance = pictureBox1.Width;
for (int i = 0; i < 4; i++)
{
Dogs[i] = new Greyhound();
Dogs[i].Randomizer = Randomizer;
Dogs[i].RacetrackLength = distance;
Dogs[i].Location = Dogs[i].StartingPosition = StartPosition;
}
Dogs[0].MyPictureBox = pictureBoxDog1;
Dogs[1].MyPictureBox = pictureBoxDog2;
Dogs[2].MyPictureBox = pictureBoxDog3;
Dogs[3].MyPictureBox = pictureBoxDog4;
CurrentBettor = Bettors[0];
}
private void RaceButton_Click(object sender, EventArgs e)
{
int winner = 0;
int num_winners = 0;
while (num_winners == 0)
{
for (int i = 0; i < Dogs.Length; i++)
{
if (Dogs[i].Run())
{
num_winners++;
winner = i + 1;
}
}
Application.DoEvents();
System.Threading.Thread.Sleep(3);
}
if (num_winners > 1)
MessageBox.Show("We have " + num_winners + " winners");
else
MessageBox.Show(" Dog #" + winner + "wins!");
for (int i = 0; i < Dogs.Length; i++)
{
Dogs[i].TakeStartingPosition();
}
for (int i = 0; i < Bettors.Length; i ++)
{
Bettors[i].Collect(winner);
Bettors[i].ClearBet();
Bettors[i].UpdateLabels();
}
numericUpDownBet.Value = numericUpDownBet.Minimum;
numericUpDownDog.Value = numericUpDownDog.Minimum;
}
private void joeRadioButton_CheckedChanged(object sender, EventArgs e)
{
SetBettor(0);
}
private void bobRadioButton_CheckedChanged_1(object sender, EventArgs e)
{
SetBettor(1);
}
private void alRadioButton_CheckedChanged_1(object sender, EventArgs e)
{
SetBettor(2);
}
private void BetsButton_Click(object sender, EventArgs e)
{
CurrentBettor.PlaceBet((int)numericUpDownBet.Value, (int)numericUpDownDog.Value);
CurrentBettor.UpdateLabels();
}
private void SetBettor(int index)
{
CurrentBettor = Bettors[index];
NameLabel.Text = CurrentBettor.Name;
if (CurrentBettor.MyBet != null)
{
numericUpDownBet.Value = CurrentBettor.MyBet.Amount;
numericUpDownDog.Value = CurrentBettor.MyBet.Dog;
}
else
{
numericUpDownBet.Value = numericUpDownBet.Minimum;
numericUpDownDog.Value = 1;
}
}
private void Form1_Load(object sender, EventArgs e)
{
minimumBetLabel.Text = "Minimum Bet $5.00";
}
private void ResetButton_Click(object sender, EventArgs e)
{
pictureBoxDog1.Location = new Point(61,32);
pictureBoxDog2.Location = new Point(61,84);
pictureBoxDog3.Location = new Point(61,131);
pictureBoxDog4.Location = new Point(61,181);
}
}
}
Form1.Designer.cs
namespace A_Day_at_the_Races
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.pictureBoxDog1 = new System.Windows.Forms.PictureBox();
this.pictureBoxDog2 = new System.Windows.Forms.PictureBox();
this.pictureBoxDog3 = new System.Windows.Forms.PictureBox();
this.pictureBoxDog4 = new System.Windows.Forms.PictureBox();
this.RaceButton = new System.Windows.Forms.Button();
this.minimumBetLabel = new System.Windows.Forms.Label();
this.joeRadioButton = new System.Windows.Forms.RadioButton();
this.bobRadioButton = new System.Windows.Forms.RadioButton();
this.alRadioButton = new System.Windows.Forms.RadioButton();
this.BetsLabel = new System.Windows.Forms.Label();
this.joeBetLabel = new System.Windows.Forms.Label();
this.bobBetLabel = new System.Windows.Forms.Label();
this.alBetLabel = new System.Windows.Forms.Label();
this.NameLabel = new System.Windows.Forms.Label();
this.BetsButton = new System.Windows.Forms.Button();
this.numericUpDownBet = new System.Windows.Forms.NumericUpDown();
this.label1 = new System.Windows.Forms.Label();
this.numericUpDownDog = new System.Windows.Forms.NumericUpDown();
this.ResetButton = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog2)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog3)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog4)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDownBet)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDownDog)).BeginInit();
this.SuspendLayout();
//
// pictureBox1
//
this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
this.pictureBox1.Location = new System.Drawing.Point(12, 12);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(602, 201);
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;
//
// pictureBoxDog1
//
this.pictureBoxDog1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxDog1.Image")));
this.pictureBoxDog1.Location = new System.Drawing.Point(22, 21);
this.pictureBoxDog1.Name = "pictureBoxDog1";
this.pictureBoxDog1.Size = new System.Drawing.Size(75, 21);
this.pictureBoxDog1.TabIndex = 1;
this.pictureBoxDog1.TabStop = false;
//
// pictureBoxDog2
//
this.pictureBoxDog2.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxDog2.Image")));
this.pictureBoxDog2.Location = new System.Drawing.Point(22, 70);
this.pictureBoxDog2.Name = "pictureBoxDog2";
this.pictureBoxDog2.Size = new System.Drawing.Size(75, 22);
this.pictureBoxDog2.TabIndex = 2;
this.pictureBoxDog2.TabStop = false;
//
// pictureBoxDog3
//
this.pictureBoxDog3.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxDog3.Image")));
this.pictureBoxDog3.Location = new System.Drawing.Point(22, 120);
this.pictureBoxDog3.Name = "pictureBoxDog3";
this.pictureBoxDog3.Size = new System.Drawing.Size(75, 24);
this.pictureBoxDog3.TabIndex = 3;
this.pictureBoxDog3.TabStop = false;
//
// pictureBoxDog4
//
this.pictureBoxDog4.Image = ((System.Drawing.Image)(resources.GetObject("pictureBoxDog4.Image")));
this.pictureBoxDog4.Location = new System.Drawing.Point(22, 170);
this.pictureBoxDog4.Name = "pictureBoxDog4";
this.pictureBoxDog4.Size = new System.Drawing.Size(75, 24);
this.pictureBoxDog4.TabIndex = 4;
this.pictureBoxDog4.TabStop = false;
//
// RaceButton
//
this.RaceButton.Location = new System.Drawing.Point(468, 269);
this.RaceButton.Name = "RaceButton";
this.RaceButton.Size = new System.Drawing.Size(146, 73);
this.RaceButton.TabIndex = 5;
this.RaceButton.Text = "Race!";
this.RaceButton.UseVisualStyleBackColor = true;
this.RaceButton.Click += new System.EventHandler(this.RaceButton_Click);
//
// minimumBetLabel
//
this.minimumBetLabel.AutoSize = true;
this.minimumBetLabel.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.minimumBetLabel.Location = new System.Drawing.Point(9, 241);
this.minimumBetLabel.Name = "minimumBetLabel";
this.minimumBetLabel.Size = new System.Drawing.Size(0, 13);
this.minimumBetLabel.TabIndex = 6;
//
// joeRadioButton
//
this.joeRadioButton.AutoSize = true;
this.joeRadioButton.Location = new System.Drawing.Point(12, 269);
this.joeRadioButton.Name = "joeRadioButton";
this.joeRadioButton.Size = new System.Drawing.Size(85, 17);
this.joeRadioButton.TabIndex = 7;
this.joeRadioButton.TabStop = true;
this.joeRadioButton.Text = "radioButton1";
this.joeRadioButton.UseVisualStyleBackColor = true;
this.joeRadioButton.CheckedChanged += new System.EventHandler(this.joeRadioButton_CheckedChanged);
//
// bobRadioButton
//
this.bobRadioButton.AutoSize = true;
this.bobRadioButton.Location = new System.Drawing.Point(12, 293);
this.bobRadioButton.Name = "bobRadioButton";
this.bobRadioButton.Size = new System.Drawing.Size(85, 17);
this.bobRadioButton.TabIndex = 8;
this.bobRadioButton.TabStop = true;
this.bobRadioButton.Text = "radioButton1";
this.bobRadioButton.UseVisualStyleBackColor = true;
this.bobRadioButton.CheckedChanged += new System.EventHandler(this.bobRadioButton_CheckedChanged_1);
//
// alRadioButton
//
this.alRadioButton.AutoSize = true;
this.alRadioButton.Location = new System.Drawing.Point(12, 317);
this.alRadioButton.Name = "alRadioButton";
this.alRadioButton.Size = new System.Drawing.Size(85, 17);
this.alRadioButton.TabIndex = 9;
this.alRadioButton.TabStop = true;
this.alRadioButton.Text = "radioButton2";
this.alRadioButton.UseVisualStyleBackColor = true;
this.alRadioButton.CheckedChanged += new System.EventHandler(this.alRadioButton_CheckedChanged_1);
//
// BetsLabel
//
this.BetsLabel.AutoSize = true;
this.BetsLabel.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.BetsLabel.Location = new System.Drawing.Point(164, 241);
this.BetsLabel.Name = "BetsLabel";
this.BetsLabel.Size = new System.Drawing.Size(32, 13);
this.BetsLabel.TabIndex = 10;
this.BetsLabel.Text = "Bets";
//
// joeBetLabel
//
this.joeBetLabel.AutoSize = true;
this.joeBetLabel.Location = new System.Drawing.Point(164, 269);
this.joeBetLabel.Name = "joeBetLabel";
this.joeBetLabel.Size = new System.Drawing.Size(35, 13);
this.joeBetLabel.TabIndex = 11;
this.joeBetLabel.Text = "label1";
//
// bobBetLabel
//
this.bobBetLabel.AutoSize = true;
this.bobBetLabel.Location = new System.Drawing.Point(164, 293);
this.bobBetLabel.Name = "bobBetLabel";
this.bobBetLabel.Size = new System.Drawing.Size(35, 13);
this.bobBetLabel.TabIndex = 12;
this.bobBetLabel.Text = "label1";
//
// alBetLabel
//
this.alBetLabel.AutoSize = true;
this.alBetLabel.Location = new System.Drawing.Point(164, 317);
this.alBetLabel.Name = "alBetLabel";
this.alBetLabel.Size = new System.Drawing.Size(35, 13);
this.alBetLabel.TabIndex = 13;
this.alBetLabel.Text = "label1";
//
// NameLabel
//
this.NameLabel.AutoSize = true;
this.NameLabel.Location = new System.Drawing.Point(9, 359);
this.NameLabel.Name = "NameLabel";
this.NameLabel.Size = new System.Drawing.Size(0, 13);
this.NameLabel.TabIndex = 14;
//
// BetsButton
//
this.BetsButton.Location = new System.Drawing.Point(54, 354);
this.BetsButton.Name = "BetsButton";
this.BetsButton.Size = new System.Drawing.Size(75, 23);
this.BetsButton.TabIndex = 15;
this.BetsButton.Text = "Bets";
this.BetsButton.UseVisualStyleBackColor = true;
this.BetsButton.Click += new System.EventHandler(this.BetsButton_Click);
//
// numericUpDownBet
//
this.numericUpDownBet.Location = new System.Drawing.Point(135, 357);
this.numericUpDownBet.Minimum = new decimal(new int[] {
5,
0,
0,
0});
this.numericUpDownBet.Name = "numericUpDownBet";
this.numericUpDownBet.Size = new System.Drawing.Size(72, 20);
this.numericUpDownBet.TabIndex = 16;
this.numericUpDownBet.Value = new decimal(new int[] {
5,
0,
0,
0});
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(214, 359);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(113, 13);
this.label1.TabIndex = 17;
this.label1.Text = "bucks on dog number ";
//
// numericUpDownDog
//
this.numericUpDownDog.Location = new System.Drawing.Point(334, 356);
this.numericUpDownDog.Maximum = new decimal(new int[] {
4,
0,
0,
0});
this.numericUpDownDog.Minimum = new decimal(new int[] {
1,
0,
0,
0});
this.numericUpDownDog.Name = "numericUpDownDog";
this.numericUpDownDog.Size = new System.Drawing.Size(79, 20);
this.numericUpDownDog.TabIndex = 18;
this.numericUpDownDog.Value = new decimal(new int[] {
1,
0,
0,
0});
//
// ResetButton
//
this.ResetButton.Location = new System.Drawing.Point(468, 349);
this.ResetButton.Name = "ResetButton";
this.ResetButton.Size = new System.Drawing.Size(146, 41);
this.ResetButton.TabIndex = 19;
this.ResetButton.Text = "Reset";
this.ResetButton.UseVisualStyleBackColor = true;
this.ResetButton.Click += new System.EventHandler(this.ResetButton_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(626, 410);
this.Controls.Add(this.ResetButton);
this.Controls.Add(this.numericUpDownDog);
this.Controls.Add(this.label1);
this.Controls.Add(this.numericUpDownBet);
this.Controls.Add(this.BetsButton);
this.Controls.Add(this.NameLabel);
this.Controls.Add(this.alBetLabel);
this.Controls.Add(this.bobBetLabel);
this.Controls.Add(this.joeBetLabel);
this.Controls.Add(this.BetsLabel);
this.Controls.Add(this.alRadioButton);
this.Controls.Add(this.bobRadioButton);
this.Controls.Add(this.joeRadioButton);
this.Controls.Add(this.minimumBetLabel);
this.Controls.Add(this.RaceButton);
this.Controls.Add(this.pictureBoxDog4);
this.Controls.Add(this.pictureBoxDog3);
this.Controls.Add(this.pictureBoxDog2);
this.Controls.Add(this.pictureBoxDog1);
this.Controls.Add(this.pictureBox1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog2)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog3)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.pictureBoxDog4)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDownBet)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDownDog)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.PictureBox pictureBoxDog1;
private System.Windows.Forms.PictureBox pictureBoxDog2;
private System.Windows.Forms.PictureBox pictureBoxDog3;
private System.Windows.Forms.PictureBox pictureBoxDog4;
private System.Windows.Forms.Button RaceButton;
private System.Windows.Forms.Label minimumBetLabel;
private System.Windows.Forms.RadioButton joeRadioButton;
private System.Windows.Forms.RadioButton bobRadioButton;
private System.Windows.Forms.RadioButton alRadioButton;
private System.Windows.Forms.Label BetsLabel;
private System.Windows.Forms.Label joeBetLabel;
private System.Windows.Forms.Label bobBetLabel;
private System.Windows.Forms.Label alBetLabel;
private System.Windows.Forms.Label NameLabel;
private System.Windows.Forms.Button BetsButton;
private System.Windows.Forms.NumericUpDown numericUpDownBet;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.NumericUpDown numericUpDownDog;
private System.Windows.Forms.Button ResetButton;
}
}

in PlaceBet method you have forgotten to set the Bettor property:
if (Cash >= Amount)
{
Cash = Cash - Amount;
MyLabel = new Label();
MyBet.Amount = Amount; // HERE
MyBet.Dog = Dog; // HERE
UpdateLabels();
return true;
just add there also a line:
MyBet.Bettor = this;
Explanation/rationale: The point is that without it, when a "Guy" creates a "Bet", the Bet does not get to know who has created it. Nowhere in your code you set the Bettor field, so it never has a chance to be set to something meaningful. The bet will simply retain the default NULL value in this field. As I do not actually read/trace all the code, I think the simpliest way would be to make the Bet know his owner straight from the very beginning.

In Guy.cs when you call PlaceBet(...) and create instantiate the bet, you need to set:
this.MyBet.Bettor = this;
Within this function, this refers to the instance of Guy that is placing the bet.
The second problem you have is with the creation of a new instance of Label, without actually replacing the Label on your form with the new one. In summary fix the PlaceBet(...) method like so:
public bool PlaceBet(int Amount, int Dog)
{
this.MyBet = new Bet();
if (Cash >= Amount)
{
Cash = Cash - Amount;
// remove the following line
// MyLabel = new Label();
MyBet.Amount = Amount;
MyBet.Dog = Dog;
// insert this line...
MyBet.Bettor = this;
UpdateLabels();
return true;
}
else
{
return false;
}
}

I just performed this exercise myself in the book... been running through it. I looked over your code to see how you took care of this problem and I found a pretty big bug in how you handled paying out the betters - In form1.cs when you allow your loop to capture multiple winners you are not continuing to distribute winnings with the Collect method to anyone who bet on anything besides the last winning dog
while (num_winners == 0)
{
for (int i = 0; i < Dogs.Length; i++)
{
if (Dogs[i].Run())
{
num_winners++;
winner = i + 1;
}
}
Application.DoEvents();
System.Threading.Thread.Sleep(3);
}
if (num_winners > 1)
// you say that you have multiple winners right here but you never eval on
//it - winner is still set to one value above
MessageBox.Show("We have " + num_winners + " winners");
else
MessageBox.Show(" Dog #" + winner + "wins!");
for (int i = 0; i < Dogs.Length; i++)
{
Dogs[i].TakeStartingPosition();
}
for (int i = 0; i < Bettors.Length; i ++)
{
Bettors[i].Collect(winner);
Bettors[i].ClearBet();
Bettors[i].UpdateLabels();
}
What will need to be changed to correct this and disperse bets appropriately:
1) Make the betting scheme more realistic - when the bet is placed - subtract the money. You need to allow for a Re-Bet to take place just in case someone wants to redo one of the users on the front page
in guy.cs
public bool PlaceBet(int amount, int dog)
{
// place a new bet and store it in the bet field, return true if there is enough money
if (amount > Cash)
{
MessageBox.Show("I don't have enough money for that bet!", Name + " says...");
return false;
}
else
{
if (this.MyBet == null)
{
this.MyBet = new Bet() { Amount = amount, Bettor = this, Dog = dog };
this.Cash -= amount;
this.UpdateLabels();
return true;
}
else
{
this.Cash += this.MyBet.Amount;
this.MyBet = null;
this.MyBet = new Bet() { Amount = amount, Bettor = this, Dog = dog };
this.Cash -= amount;
this.UpdateLabels();
return true;
}
}
}
2) Now that the betters already lost/submitted their money and we don't have to worry about sending negative monies to them if their dog doesn't win, the Bet.cs Payout method can be updated to only provide a positive return if the winning dog matches their bet dog. if it doesn't, it returns nothing.
public int PayOut(int Winner)
{
// the parameter is the winner of the race. If the dog won, return the amount bet.
// otherwise return nothing
if (Winner == Dog)
{
int payout = Amount*2;
return payout;
}
else
{
int payout = 0;
return payout;
}
}
3) and now we can adjust our scheme in form1.cs to take care of paying multiples (even though this never really happens)
private void formButtonRace_Click(object sender, EventArgs e)
{
int winner = 0;
int windog = 0;
int count = 0;
for (int i = 0; i < Bettors.Length; i++)
{
if (Bettors[1].MyBet != null)
{
count++;
}
}
if (count == Bettors.Length)
{
while (winner == 0)
{
for (int i = 0; i < Dogs.Length; i++)
{
if (Dogs[i].Run())
{
winner++;
windog = i + 1;
for (int i2 = 0; i2 < Bettors.Length; i2++)
{
Bettors[i2].Collect(i + 1);
}
}
Application.DoEvents();
System.Threading.Thread.Sleep(3);
}
}
if (winner > 1)
{
MessageBox.Show("Multiple winners!", "WOW");
}
else
{
MessageBox.Show("The winner was dog #" + windog);
}
for (int i = 0; i < Bettors.Length; i++)
{
Bettors[i].ClearBet(true);
}
for (int i = 0; i < Dogs.Length; i++)
{
Dogs[i].TakeStartingPosition();
}
}
else
{
MessageBox.Show("Not all players have placed their bets!", "Wait wait!");
}
}
The reason why my ClearBet is passing in a bool is because I had to restore the money bet to each individual Guy if the reset button was pressed. However, if the race was completed I wanted to reset them without returning their bets.
This is that section for me in my code:
public void ClearBet(bool isRaceOver)
{
if (isRaceOver)
// reset bet when race is over
{
MyBet = null;
}
else
{
if (this.MyBet != null)
{
Cash += this.MyBet.Amount;
this.MyBet = null;
}
else
{
this.MyBet = null;
}
}
UpdateLabels();
}

In the PlaceBet() method, you are overwriting MyLabel with a new Label() therefore the original context of the label on the form is lost.
Although you are actually updating a Label, it's not the Label on the form.
public bool PlaceBet(int Amount, int Dog)
{
this.MyBet = new Bet();
if (Cash >= Amount)
{
Cash = Cash - Amount;
MyLabel = new Label(); // remove this
MyBet.Amount = Amount;
MyBet.Dog = Dog;
UpdateLabels();
return true;
}
else
{
return false;
}
}

C# Listbox Drag and Drop Rows

I'm trying to implement a C# drag and drop row-reorder with a listbox. I've come across some snippets of code on the internet but none seem to be working with my needs.
I want you to show me an example code of how to move rows in ListBox.
Thanks!

The moving of rows is done in methods "listBox1_MouseUp and listBox1_MouseDown.
Use view code to change this:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Calculator
{
public partial class ComponentMover : Form
{
private Control trackedControl;
private int gridWidth = 100, gridHeight = 20;
private int row;
public ComponentMover()
{
this.InitializeComponent();
this.InitializeDynamic();
}
void draggable_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (this.trackedControl == null)
this.trackedControl = (Control)sender;
}
void draggable_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (this.trackedControl != null)
{
int x = e.X + this.trackedControl.Location.X;
int y = e.Y + this.trackedControl.Location.Y;
Point moved = new Point(x - x % this.gridWidth, y - y % this.gridHeight);
Console.WriteLine(e.X + ", " + e.Y + ", " + ", " + moved.X + ", " + moved.Y);
if (moved != this.trackedControl.Location)
this.trackedControl.Location = moved;
}
}
void draggable_MouseUp(object sender, MouseEventArgs e)
{
this.trackedControl = null;
}
private void AddDragListeners(Control draggable)
{
draggable.MouseDown += new MouseEventHandler(draggable_MouseDown);
draggable.MouseMove += new MouseEventHandler(draggable_MouseMove);
draggable.MouseUp += new MouseEventHandler(draggable_MouseUp);
}
}
}
Designer code:
namespace Calculator
{
// Designer code.
partial class ComponentMover
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
private void InitializeDynamic()
{
this.AddDragListeners(button1);
this.AddDragListeners(button4);
this.AddDragListeners(domainUpDown1);
this.AddDragListeners(textBox1);
this.AddDragListeners(checkBox1);
this.AddDragListeners(radioButton1);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.domainUpDown1 = new System.Windows.Forms.DomainUpDown();
this.textBox1 = new System.Windows.Forms.TextBox();
this.checkBox1 = new System.Windows.Forms.CheckBox();
this.radioButton1 = new System.Windows.Forms.RadioButton();
this.listBox1 = new System.Windows.Forms.ListBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(13, 13);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 23);
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.UseVisualStyleBackColor = true;
//
// button4
//
this.button4.Location = new System.Drawing.Point(177, 43);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(75, 23);
this.button4.TabIndex = 3;
this.button4.Text = "button4";
this.button4.UseVisualStyleBackColor = true;
//
// domainUpDown1
//
this.domainUpDown1.Location = new System.Drawing.Point(95, 42);
this.domainUpDown1.Name = "domainUpDown1";
this.domainUpDown1.Size = new System.Drawing.Size(74, 20);
this.domainUpDown1.TabIndex = 4;
this.domainUpDown1.Text = "domainUpDown1";
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(177, 72);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(100, 20);
this.textBox1.TabIndex = 5;
//
// checkBox1
//
this.checkBox1.AutoSize = true;
this.checkBox1.Location = new System.Drawing.Point(281, 13);
this.checkBox1.Name = "checkBox1";
this.checkBox1.Size = new System.Drawing.Size(80, 17);
this.checkBox1.TabIndex = 6;
this.checkBox1.Text = "checkBox1";
this.checkBox1.UseVisualStyleBackColor = true;
//
// radioButton1
//
this.radioButton1.AutoSize = true;
this.radioButton1.Location = new System.Drawing.Point(366, 42);
this.radioButton1.Name = "radioButton1";
this.radioButton1.Size = new System.Drawing.Size(85, 17);
this.radioButton1.TabIndex = 7;
this.radioButton1.TabStop = true;
this.radioButton1.Text = "radioButton1";
this.radioButton1.UseVisualStyleBackColor = true;
//
// listBox1
//
this.listBox1.FormattingEnabled = true;
this.listBox1.Items.AddRange(new object[] {
"word1",
"word2",
"word3"});
this.listBox1.Location = new System.Drawing.Point(13, 42);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(76, 82);
this.listBox1.TabIndex = 8;
this.listBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(listBox1_MouseDown);
this.listBox1.MouseUp += new System.Windows.Forms.MouseEventHandler(listBox1_MouseUp);
//
// ComponentMover
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(485, 159);
this.Controls.Add(this.listBox1);
this.Controls.Add(this.radioButton1);
this.Controls.Add(this.checkBox1);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.domainUpDown1);
this.Controls.Add(this.button4);
this.Controls.Add(this.button1);
this.Name = "ComponentMover";
this.Text = "ComponentMover";
this.ResumeLayout(false);
this.PerformLayout();
}
void listBox1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
System.Windows.Forms.ListBox list = (System.Windows.Forms.ListBox)sender;
int swap = list.SelectedIndex;
if(swap != this.row)
{
string temp = (string)list.Items[this.row];
list.Items[this.row] = list.Items[swap];
list.Items[swap] = temp;
}
}
void listBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
this.row = ((System.Windows.Forms.ListBox)sender).SelectedIndex;
}
#endregion
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.DomainUpDown domainUpDown1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.CheckBox checkBox1;
private System.Windows.Forms.RadioButton radioButton1;
private System.Windows.Forms.ListBox listBox1;
}
}

Performance Counter Category Names? (C#)

I'm trying to program in a performance counter into my C# application that launches another process and checks the processor usage of that launched process. As I understand it, the performance counter class requires me to assign a category name , a counter name, and a process name. I can get the process name easily enough, but is there a list of some sort on the internet that has all possible category and counter names I can assign? I tried scouring MSDN for something like this, but I didn't find anything.
Thanks for all the help!

I think you want to know what aspects of the process you can monitor. A list of the Process Performance Counters is available here.
Nevertheless, you can use the GetCategories static method to list all categories in the machine or you could be more specific and create the PerformanceCategory for the "Process" category and use the GetCounters to get a list of all counters available.
Hope this helps.

For those who want to quickly browse and find needed Counter here's a quick Form that displays three list boxes with |Categories|Instances|Counters| and a Counter Value that is updated on a timer. With filters.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Windows.Forms;
namespace CountersListPreview
{
internal static class CounterPreview
{
[STAThread]
private static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Form f = new CountersListPreviewForm();
Application.Run(f);
}
}
internal class CountersListPreviewForm : Form
{
public CountersListPreviewForm()
{
InitializeComponent();
}
private PerformanceCounterCategory[] allCats;
private string[] instances;
private PerformanceCounter[] counters;
private PerformanceCounter counter;
private Timer TitleRefreshTimer;
private void Form1_Load(object sender, EventArgs e)
{
allCats = PerformanceCounterCategory.GetCategories();
listBox1.DataSource = allCats;
listBox1.DisplayMember = "CategoryName";
listBox1.SelectedIndexChanged += On_CatChange;
listBox2.SelectedIndexChanged += On_InstChange;
listBox3.SelectedIndexChanged += On_CounterChange;
textBox2.TextChanged += On_CatFilterChanged;
textBox3.TextChanged += On_InstFilterChanged;
textBox4.TextChanged += On_CounterFilterChanged;
TitleRefreshTimer = new Timer();
TitleRefreshTimer.Tick += On_Timer;
TitleRefreshTimer.Interval = 500;
TitleRefreshTimer.Start();
}
private void On_Timer(object sender, EventArgs e)
{
textBox1.Text = counter != null ? counter.NextValue().ToString() : "";
}
// --------------- SELECTION CHANGE ------------------
private void On_CatChange(object sender, EventArgs e)
{
var cat = listBox1.SelectedItem as PerformanceCounterCategory;
listBox2.DataSource = instances = cat.GetInstanceNames();
}
private void On_InstChange(object sender, EventArgs e)
{
var cat = listBox1.SelectedItem as PerformanceCounterCategory;
var inst = listBox2.SelectedItem as string;
listBox3.DataSource = counters = cat.GetCounters(inst);
listBox3.DisplayMember = "CounterName";
}
private void On_CounterChange(object sender, EventArgs e)
{
counter = listBox3.SelectedItem as PerformanceCounter;
On_Timer(null, null);
}
// --------------- FILTERS ------------------
private void On_CatFilterChanged(object sender, EventArgs e)
{
var filter = textBox2.Text;
listBox1.DataSource = !string.IsNullOrEmpty(filter)
? allCats.Where(cat => cat.CategoryName.ToLower().Contains(filter.ToLower())).ToArray()
: allCats;
}
private void On_InstFilterChanged(object sender, EventArgs e)
{
var filter = textBox3.Text;
listBox2.DataSource = !string.IsNullOrEmpty(filter)
? instances.Where(inst => inst.ToLower().Contains(filter.ToLower())).ToArray()
: instances;
}
private void On_CounterFilterChanged(object sender, EventArgs e)
{
var filter = textBox4.Text;
listBox3.DataSource = !string.IsNullOrEmpty(filter)
? counters.Where(c => c.CounterName.ToLower().Contains(filter.ToLower())).ToArray()
: counters;
}
// --------------- FORM AND LAYOUT ------------------
private readonly IContainer components = null;
protected override void Dispose(bool disposing)
{
if (disposing && components != null) components.Dispose();
base.Dispose(disposing);
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.listBox1 = new System.Windows.Forms.ListBox();
this.listBox2 = new System.Windows.Forms.ListBox();
this.listBox3 = new System.Windows.Forms.ListBox();
this.textBox1 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.textBox4 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.FormattingEnabled = true;
this.listBox1.Location = new System.Drawing.Point(12, 38);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(351, 524);
this.listBox1.TabIndex = 3;
//
// listBox2
//
this.listBox2.FormattingEnabled = true;
this.listBox2.Location = new System.Drawing.Point(369, 38);
this.listBox2.Name = "listBox2";
this.listBox2.Size = new System.Drawing.Size(351, 524);
this.listBox2.TabIndex = 3;
//
// listBox3
//
this.listBox3.FormattingEnabled = true;
this.listBox3.Location = new System.Drawing.Point(726, 38);
this.listBox3.Name = "listBox3";
this.listBox3.Size = new System.Drawing.Size(351, 524);
this.listBox3.TabIndex = 3;
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(726, 568);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(351, 20);
this.textBox1.TabIndex = 4;
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(606, 571);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(114, 13);
this.label1.TabIndex = 5;
this.label1.Text = "Counter Value (500ms)";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(12, 12);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(351, 20);
this.textBox2.TabIndex = 4;
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(369, 12);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(351, 20);
this.textBox3.TabIndex = 4;
//
// textBox4
//
this.textBox4.Location = new System.Drawing.Point(726, 12);
this.textBox4.Name = "textBox4";
this.textBox4.Size = new System.Drawing.Size(351, 20);
this.textBox4.TabIndex = 4;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
//this.BackColor = System.Drawing.SystemColors.;
this.ClientSize = new System.Drawing.Size(1090, 597);
this.Controls.Add(this.label1);
this.Controls.Add(this.textBox4);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.listBox3);
this.Controls.Add(this.listBox2);
this.Controls.Add(this.listBox1);
//this.ForeColor = System.Drawing.SystemColors.ControlLightLight;
this.Name = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private ListBox listBox1;
private ListBox listBox2;
private ListBox listBox3;
private TextBox textBox1;
private Label label1;
private TextBox textBox2;
private TextBox textBox3;
private TextBox textBox4;
}
}

I have created a method that show what CriGoT have writted above, a small shortcut.
private static void GetAllCounters(string categoryFilter)
{
var categories = PerformanceCounterCategory.GetCategories();
foreach (var cat in categories)
{
if (categoryFilter != null && categoryFilter.Length > 0)
{
if (!cat.CategoryName.Contains(categoryFilter)) continue;
}
Console.WriteLine("Category {0}", cat.CategoryName);
try
{
var instances = cat.GetInstanceNames();
if (instances != null && instances.Length > 0)
{
foreach (var instance in instances)
{
//if (cat.CounterExists(instance))
//{
foreach (var counter in cat.GetCounters(instance))
{
Console.WriteLine("\tCounter Name {0} [{1}]", counter.CounterName, instance);
}
//}
}
}
else
{
foreach (var counter in cat.GetCounters())
{
Console.WriteLine("\tCounter Name {0}", counter.CounterName);
}
}
}
catch (Exception)
{
// NO COUNTERS
}
}
Console.ReadLine();
}
:-)

You can assign them whatever you want. The Performance Monitor will simply show whatever category you choose and whatever counter name you choose for your particular need.
CounterCreationDataCollection ccdc = new CounterCreationDataCollection();
ccdc.Add(new CounterCreationData("Counter Title", "Counter Description", PerformanceCounterType.NumberOfItems32));
PerformanceCounterCategory.Create("My Counter Category", "Category Description", PerformanceCounterCategoryType.Unknown, ccdc);

Categories