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Create multiple label over the multiple ellipse

I have 6 ellipse and 6 label. I want to add labels over the ellipse. 2 of labels is OK but the others not.
In debug mode there is no error.
Here is the code:
private void Form1_Paint(object sender, PaintEventArgs e)
{
int locY = 200, locX = 10, i = 0;
for (int k = 0; k < 3; k++)
{
locX += 40;
for (int j = 0; j < 2; j++)
{
locY += 30;
Pen pen = new Pen(Color.Red, 10);
e.Graphics.DrawEllipse(pen, new Rectangle(locX, locY, 10, 10));
Label label = new Label();
label.Text = i.ToString();
label.Location = new Point(locX,locY);
label.BackColor = Color.Transparent;
Controls.Add(label);
i++;
}
locY = 200;
}
}
Here is the output:

You should also create that Pen outside of the loop and make sure to dispose of it.
Here's an example using DrawString() as described in the comments:
private void Form1_Paint(object sender, PaintEventArgs e)
{
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
int locY = 200, locX = 10, i = 0;
using (Pen pen = new Pen(Color.Red, 10))
{
for (int k = 0; k < 3; k++)
{
locX += 40;
for (int j = 0; j < 2; j++)
{
locY += 30;
Rectangle rc = new Rectangle(locX, locY, 10, 10);
e.Graphics.DrawEllipse(pen, rc);
SizeF szF = e.Graphics.MeasureString(i.ToString(), this.Font);
Rectangle rc2 = new Rectangle(new Point(rc.Left + rc.Width / 2, rc.Top + rc.Height / 2), new Size(1, 1));
rc2.Inflate((int)szF.Width, (int)szF.Height);
e.Graphics.DrawString(i.ToString(), this.Font, Brushes.Black, rc2, sf);
i++;
}
locY = 200;
}
}
}

Change color of only part of text inside a data grid view cell by using c#

I want to change color the given search text in the DataGridView but the data is in Arabic. I have tried CellPainting event to find the bounds of the search text and draw FillRectangle, but I want to change color not highlight for search text.
Here are two figures:
The first figure I want is the same:
The second figure of the form I used:
This is the code that I used
if ((e.RowIndex <= -1 ? false : e.ColumnIndex > -1))
{
string str = txtSearch.Text.Trim();
if (!string.IsNullOrWhiteSpace(str))
{
string[] strArrays = str.Split(new char[] { ' ' });
List<Rectangle> rectangles = new List<Rectangle>();
string[] strArrays1 = strArrays;
for (int i = 0; i < (int)strArrays1.Length; i++)
{
string str1 = strArrays1[i];
string str2 = e.FormattedValue.ToString();
int num = str2.ToLower().IndexOf(str1.ToLower());
if (num >= 0)
{
e.Handled = true;
e.PaintBackground(e.CellBounds, true);
Rectangle y = new Rectangle();
Rectangle cellBounds = e.CellBounds;
y.Y = cellBounds.Y + 2;
cellBounds = e.CellBounds;
y.Height = cellBounds.Height - 5;
string str3 = str2.Substring(0, num);
string str4 = str2.Substring(num, str1.Length);
Graphics graphics = e.Graphics;
Font font = e.CellStyle.Font;
cellBounds = e.CellBounds;
Size size = TextRenderer.MeasureText(graphics, str2, font, cellBounds.Size);
Graphics graphic = e.Graphics;
Font font1 = e.CellStyle.Font;
cellBounds = e.CellBounds;
Size size1 = TextRenderer.MeasureText(graphic, str3, font1, cellBounds.Size);
Graphics graphics1 = e.Graphics;
Font font2 = e.CellStyle.Font;
cellBounds = e.CellBounds;
Size size2 = TextRenderer.MeasureText(graphics1, str4, font2, cellBounds.Size);
cellBounds = e.CellBounds;
int width = (cellBounds.Width - size.Width) / 2;
int x = e.CellBounds.X;
cellBounds = e.CellBounds;
int width1 = x + cellBounds.Width;
y.X = width1 - size1.Width - size2.Width + 5 - width;
y.Width = size2.Width;
rectangles.Add(y);
}
}
if (rectangles.Count > 0)
{
SolidBrush solidBrush = new SolidBrush(Color.Yellow);
foreach (Rectangle rectangle in rectangles)
{
e.Graphics.FillRectangle(solidBrush, rectangle);
}
solidBrush.Dispose();
e.PaintContent(e.CellBounds);
}
}
}

Graphics.FillRectangle will not change the ForeColor.I have modified then CellPainting event.I am using the Graphics.DrawString for changing the ForeColor.
if ((e.RowIndex <= -1 ? false : e.ColumnIndex > -1))
{
string str = txtSearch.Text.Trim();
if (!string.IsNullOrWhiteSpace(str))
{
string[] strArrays = str.Split(new char[] { ' ' });
string[] strArrays1 = strArrays;
for (int i = 0; i < (int)strArrays1.Length; i++)
{
string str1 = strArrays1[i];
string str2 = e.FormattedValue.ToString();
int num = str2.ToLower().IndexOf(str1.ToLower());
if (num >= 0)
{
e.Handled = true;
e.PaintBackground(e.CellBounds, true);
Size size = TextRenderer.MeasureText(e.Graphics, str2, e.CellStyle.Font, e.CellBounds.Size);
Size searchSize = TextRenderer.MeasureText(e.Graphics, str1, e.CellStyle.Font, e.CellBounds.Size);
List<int> indexes = str2.AllIndexesOf(str1).ToList<int>();
string leadingPart = string.Empty;
string printString = string.Empty;
for (int index = 0; index < str2.Length; index++)
{
if (indexes.Contains(index))//Search string starts here
{
leadingPart = str2.Substring(0, index);//leading part of the string
Size leadingSize = TextRenderer.MeasureText(e.Graphics, leadingPart, e.CellStyle.Font, e.CellBounds.Size);
Rectangle rect = new Rectangle(new Point(e.CellBounds.X + leadingSize.Width, e.CellBounds.Y + 4), searchSize);
SolidBrush brush = new SolidBrush(Color.Green);
e.Graphics.DrawString(str1, e.CellStyle.Font, brush, rect);
brush.Dispose();
index += str1.Length - 1;
}
else
{
int nextIndex = indexes.FirstOrDefault(x => x > index);
leadingPart = str2.Substring(0, index);
printString = index < nextIndex ? str2.Substring(index, nextIndex - index) : str2.Substring(index);
Size leadingSize = TextRenderer.MeasureText(e.Graphics, leadingPart, e.CellStyle.Font, e.CellBounds.Size);
Size printSize = TextRenderer.MeasureText(e.Graphics, printString, e.CellStyle.Font, e.CellBounds.Size);
Rectangle rect;
if (index > 0)
rect = new Rectangle(new Point(e.CellBounds.X + leadingSize.Width, e.CellBounds.Y + 4), printSize);//4 is for adjusting the text top position
else
rect = new Rectangle(new Point(e.CellBounds.X, e.CellBounds.Y + 4), printSize);
SolidBrush brush = new SolidBrush(Color.Black);
e.Graphics.DrawString(printString, e.CellStyle.Font, brush, rect);
brush.Dispose();
index += printString.Length - 1;
}
}
}
}
}
}
Note that AllIndexesOf is an extension method for finding all the occurrences of a particular string in a given long string, which I got from this post.
public static IEnumerable<int> AllIndexesOf(this string sourceString, string subString)
{
return Regex.Matches(sourceString, subString,RegexOptions.IgnoreCase).Cast<Match>().Select(m => m.Index);
}
Hope this helps.

Place a grid of labels on a form

I'm trying to place a grid of labels on my winforms app. First, I'm populating a list of label objects of size (200 x 50) and then trying to place them so that when x reaches the width of the form (581), I increment y by 50 + 1
Here is my code:
private List<Label> _labels;
private int xOffset = 10;
private int yOffset = 10;
public Form1()
{
InitializeComponent();
_labels = new List<Label>();
for(var i = 0; i <= 20; i++)
_labels.Add(new Label() { Name = "lbl" + i, Height = 50, Width = 200, MinimumSize = new Size(200, 50), BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D, Text = "Label "+i});
// 581, 517
var x = 0;
var y = 0;
foreach (var lbl in _labels)
{
if (x >= 580)
{
x = 0;
y = y + lbl.Height + 2;
lbl.Location = new Point(x, y);
}
this.Controls.Add(lbl);
x += x + lbl.Width;
}
}
It's only placing the even labels from the list on new lines. I'm not sure what I'm doing wrong.
I'm trying to place all of the labels in a grid like design. When one row is full, go to the next row and continue placing labels from the list on that new "row"

You need to move the Location setting code out of the resetting loop:
foreach (var lbl in _labels)
{
if (x >= 580)
{
x = 0;
y = y + lbl.Height + 2;
}
lbl.Location = new Point(x, y);
this.Controls.Add(lbl);
x += lbl.Width;
}

The problematic part is here
x += x + lbl.Width; //+= x
change it to
x += lbl.Width;
Get the
lbl.Location = new Point(x, y);
out of the if statement
if (x >= 580)
{
x = 0;
y = y + lbl.Height + 2;
//lbl.Location = new Point(x, y);
}
lbl.Location = new Point(x, y);
this.Controls.Add(lbl);
x += lbl.Width;

Try this using a Docked FlowLayoutPanel:
public partial class Form1 : Form
{
List<Label> labels;
public Form1()
{
InitializeComponent();
this.labels=new List<Label>();
AddLabelsToFrom(20);
}
void AddLabelsToFrom(int count)
{
for (int i=0; i<count; i++)
{
var lbl=new Label() { Name="lbl"+i, Height=50, Width=200, MinimumSize=new Size(200, 50), BorderStyle=System.Windows.Forms.BorderStyle.Fixed3D, Text="Label "+i };
labels.Add(lbl);
flowLayoutPanel1.Controls.Add(lbl);
}
}
}

void SetGridLabel()
{
for (int i = 0; ; i++)
{
for (int j = 0; ; j++)
{
Label L = new Label();
L.TextAlign = ContentAlignment.MiddleCenter;
L.AutoSize = false;
L.Size = new Size(70, 70);
L.Text = "Test_" + j + "_" + i;
L.Location = new Point(j * L.Size.Width, i * L.Size.Height);
if ((i + 1) * L.Size.Height > this.Size.Height)
return;
if ((j + 1) * L.Size.Width > this.Size.Width)
break;
this.Controls.Add(L);
}
}
}

private List<Label> _labels;
public Form1()
{
InitializeComponent();
_labels = new List<Label>();
for (var i = 0; i <= 20; i++)
_labels.Add(new Label()
{
Name = "lbl" + i, Height = 50,Width = 200,
Size = MinimumSize = new Size(200, 50),
Location = new Point(i * 200 % 600, 50 * (i * 200 / 600)),
BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D,
Text = "Label " + i
});
foreach (var lbl in _labels) this.Controls.Add(lbl);
}

How to assign table cell width on runtime dynamically in C#?

I have a function in devexpress report which creates table from SQL query dynamically:
readonly int[] cellWidth = { 5, 20, 30, 40, 50, 60 };// { 16, 100, 100, 30, 20, 16 };
private XRTable CreateXRTableDetail(DataTable dtAra)
{
XRTable table = new XRTable();
table.BeginInit();
table.LocationFloat = new DevExpress.Utils.PointFloat(0, 5F);
table.Borders = BorderSide.All;
int tableHeight = 0;
int tableWidth = 0;
for (int i = -1; i < 4; i++)
{
XRTableRow row = new XRTableRow();
for (int j = 0; j < 6; j++)
{
XRTableCell cell = new XRTableCell();
cell.Padding = 1;
Unit width = new Unit(cellWidth[j], UnitType.Pixel);
cell.Width = (int)width.Value;
cell.Weight = 1;
cell.TextAlignment = TextAlignment.MiddleCenter;
tableWidth += cell.Width;
if (i == -1)//Header
{
row.Height = 15;
cell.Text = dtAra.Columns[j].ColumnName;
cell.BackColor = Color.Gainsboro;
cell.Font = new Font("tahoma", 6);
}
else
{
row.Height = 40;
cell.Text = dtAra.Rows[i][j].ToString();
cell.Font = new Font("tahoma", 5);
}
row.Cells.Add(cell);
}
tableHeight += row.Height;
table.Rows.Add(row);
}
tableWidth = tableWidth / table.Rows.Count;
table.Size = new Size(tableWidth, tableHeight);
table.EndInit();
return table;
}
I assing cell widths from cellWidth array but all columns are initialising with same width.
How can I set cell width as I want?

Try this:
int width = 40;
cell.SizeF = new SizeF(cell.SizeF.Width + width, cell.SizeF.Height);

Getting exception "Parameter is not valid" when minimizing the form to the taskbar

It happen only when I resize the form when the program is running.
I click the "-" and the program is minimised to the taskbar, then I see the error/exception message.
protected override void OnLayout(LayoutEventArgs levent)
{
base.OnLayout(levent);
if (!_addingLines)
SplitText(this.Text);
if (_backBmpBU != null)
this._backBmp = MakeBackBmp(_backBmpBU);
if (this.BitmapModus)
{
UpdateBitmap();
}
}
private void UpdateBitmap()
{
if (_lines != null && _lines.Length > 0)
{
SizeF sz = new SizeF(0, 0);
float lineOrigHeight = sz.Height;
using (Graphics g = this.CreateGraphics())
{
sz = g.MeasureString("Teststring", this.Font);
if (this._additionalSpaceBetweenLines > 0)
sz = new SizeF(sz.Width, sz.Height + this._additionalSpaceBetweenLines);
}
this._textHeight = sz.Height * _lines.Length;
if (_bmp != null)
{
_bmp.Dispose();
_bmp = null;
}
try
{
if (this._textHeight > MAXHEIGHT)
throw new Exception("Text too long, for BitmapMode.");
_bmp = new Bitmap(this.ClientSize.Width, (int)Math.Ceiling(this._textHeight));
using (Graphics g = Graphics.FromImage(_bmp))
{
//set it to value you like...
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.None;
using (SolidBrush b = new SolidBrush(this.ForeColor))
{
for (int i = 0; i < _lines.Length; i++)
{
SolidBrush bb = b;
if (TrimText)
_lines[i] = _lines[i].Trim();
sz = g.MeasureString(_lines[i], this.Font);
lineOrigHeight = sz.Height;
if (this._additionalSpaceBetweenLines > 0)
sz = new SizeF(sz.Width, sz.Height + this._additionalSpaceBetweenLines);
_posX = 0;
if (this.TextLayoutCentered)
_posX = (this.ClientSize.Width - sz.Width) / 2.0F;
bool drect = false;
bool colw = false;
int indx = -1;
int length = 0;
string textToFind = "";
Color fc = this.ForeColor;
Color bc = Color.Transparent;
Color rc = Color.Transparent;
if (Words != null && Words.Count > 0)
{
for (int ii = 0; ii < Words.Count; ii++)
{
if (_lines[i].Contains(Words[ii].WordOrText))
{
bb = new SolidBrush(Words[ii].ForeColor);
if (Words[ii].DrawRect)
drect = true;
if (Words[ii].ColorOnlyThisWord)
colw = true;
indx = _lines[i].IndexOf(Words[ii].WordOrText);
length = Words[ii].WordOrText.Length;
textToFind = Words[ii].WordOrText;
fc = Words[ii].ForeColor;
bc = Words[ii].BackColor;
rc = Words[ii].RectColor;
drect = Words[ii].DrawRect;
}
}
}
if (colw)
{
//reset b and create a new color brush
if (bb.Equals(b) == false)
bb.Dispose();
bb = b;
string ftext = _lines[i];
float cPosX = _posX;
using (SolidBrush bbb = new SolidBrush(fc))
{
while (indx > -1)
{
if (indx > 0)
g.DrawString(ftext.Substring(0, indx), this.Font, bb, new PointF(cPosX, sz.Height * i + _additionalSpaceBetweenLines / 2F));
cPosX += g.MeasureString(ftext.Substring(0, indx), this.Font).Width;
SizeF sfWord = g.MeasureString(ftext.Substring(indx, length), this.Font);
if (bc.ToArgb().Equals(Color.Transparent.ToArgb()) == false)
{
using (SolidBrush bbbb = new SolidBrush(bc))
g.FillRectangle(bbbb, cPosX, sz.Height * i + _additionalSpaceBetweenLines / 2F, sfWord.Width, sfWord.Height);
}
g.DrawString(ftext.Substring(indx, length), this.Font, bbb, new PointF(cPosX, sz.Height * i + _additionalSpaceBetweenLines / 2F));
cPosX += sfWord.Width;
ftext = ftext.Substring(indx + length);
if (textToFind.Length > 0)
indx = ftext.IndexOf(textToFind);
else
indx = -1;
}
if (ftext.Length > 0)
g.DrawString(ftext, this.Font, bb, new PointF(cPosX, sz.Height * i + _additionalSpaceBetweenLines / 2F));
}
}
else
{
if (bc.ToArgb().Equals(Color.Transparent.ToArgb()) == false)
{
using (SolidBrush bbbb = new SolidBrush(bc))
g.FillRectangle(bbbb, _posX, sz.Height * i + _additionalSpaceBetweenLines / 2F, sz.Width, lineOrigHeight);
}
g.DrawString(_lines[i], this.Font, bb, new PointF(_posX, sz.Height * i + _additionalSpaceBetweenLines / 2F));
}
if (drect)
{
if (rc.ToArgb().Equals(Color.Transparent.ToArgb()) == false)
using (Pen p = new Pen(rc))
g.DrawRectangle(p, _posX, sz.Height * i + _additionalSpaceBetweenLines / 2F, sz.Width, lineOrigHeight);
}
if (bb.Equals(b) == false)
bb.Dispose();
if (DrawRect)
{
using (Pen p = new Pen(this.ForeColor))
{
if (DrawRectAroundText)
g.DrawRectangle(p, _posX, sz.Height * i + _additionalSpaceBetweenLines / 2F, sz.Width, lineOrigHeight);
else
g.DrawRectangle(p, 0, sz.Height * i + _additionalSpaceBetweenLines / 2F, this.ClientSize.Width - 1, lineOrigHeight);
}
}
}
}
}
}
catch (Exception ex)
{
if (_bmp != null)
{
_bmp.Dispose();
_bmp = null;
}
this.BitmapModus = false;
//MessageBox.Show(ex.Message + " switching to Dynamic-Draw-Mode.");
OnSwitchModeOnError();
}
}
}
When the program is running and i minimize the form to the taskbar im getting exception:
Parameter is not valid
The full exception message:
System.ArgumentException was caught
HResult=-2147024809
Message=Parameter is not valid.
Source=System.Drawing
StackTrace:
at System.Drawing.Bitmap..ctor(Int32 width, Int32 height, PixelFormat format)
at System.Drawing.Bitmap..ctor(Int32 width, Int32 height)
at ScrollLabelTest.ScrollLabel.UpdateBitmap() in e:\scrolllabel\ScrollLabel\ScrollLabel\ScrollLabel.cs:line 601
InnerException:

I had the same problem, with a huge list of errors in the Just-In-Time-Debugger. After several hours of searching I found my own way. Try this, no more exceptions!!
private void picMinimize_Click(object sender, EventArgs e)
{
try
{
panelUC.Visible = false; //change visible status of your form, etc.
this.WindowState = FormWindowState.Minimized; //minimize
minimizedFlag = true; //set a global flag
}
catch (Exception)
{
}
}
private void mainForm_Resize(object sender, EventArgs e)
{
//check if form is minimized, and you know that this method is only called if and only if the form get a change in size, meaning somebody clicked in the taskbar on your application
if (minimizedFlag == true)
{
panelUC.Visible = true; //make your panel visible again! thats it
minimizedFlag = false; //set flag back
}
}
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