im making a project for university, for which i use windows forms. i have to create a program, where you can generate an several amount of textboxes and calculate all values. the calcutation is about the sum and average of every value combined. therefore i have two buttons, one to create the textboxes and another one to do the calculation (doTheMath_Click).
heres my code so far:
button for the calculation:
private void doTheMath_Click(object sender, EventArgs e)
{
int radius = int.Parse(numberofnumbers.Text)
int sum = 0;
for (int i = 0; i < zahlen.Length; i++)
{
sum += numbers[i];
}
double average = (double)sum / (double)radius;
total.Text = sum.ToString();
averagee.Text = average.ToString();;
}
int newtextboxn = 8;
int alingment = 200;
public TextBox addnewtextbox()
{
TextBox textbox = new TextBox();
this.Controls.Add(textbox);
if (newtextboxn % 18 == 0)
{
alingment += 200;
newtextboxn = 8;
textbox.Top = newtextboxn * 27;
textbox.Left = alingment;
}
else
{
textbox.Top = newtextboxn * 27;
textbox.Left = alingment;
}
newtextboxn = newtextboxn + 1;
return textbox;
}
button to print the textbox:
public void printTextbox(int radius)
{
for (int i = 0; i < radius; i++)
{
addnewtextbox();
}
}
private void printTheBox_Click(object sender, EventArgs e)
{
int radius = int.Parse(numberofnumbers.Text);
printTextboxandLabels(radius);
}
I had the idea to save the values of the textboxes in an array, but i dont know if it would work, because the array length should also be dynamically and i also dont know, how to initialize the array in the end. My other idea was to save the values in a list, but theres the same problem about the initialization.
i hope, that my problem is understandable and that you can help me.
i already surfed around stackoverflow, but i didnt found an idea to solve my problem.
thx
Just create a List where you store the created set of textboxes. Then you can use the code to loop over this list and retrieve the content of each textbox.
List<TextBox> textboxslist = new List<TextBox>();
and inside addnewtextbox() method fill textboxlist using The Add method.
textboxlist.Add(textbox);
then inside loop code in doTheMath_Click button you can access the values of each textbox by using Text Property.
for (int i = 0; i < textboxlist.Count; i++) {
int textboxvalue = int.Parse(textboxlist[i].Text);
sum += textboxvalue;
}
Related
Good to know is that I just started programming, so go easy on me ;)
In my program I make a board consisting of several buttons (btn[i, j]), which I create by using two for loops. These buttons are given a coordinate pair/index [i, j], then I pass this to a 2d array called valueBtn and I give that coordinate pair a value on the corresponding index.
public void board(object obj, EventArgs ea)
{
int n = 6;
Button[,] btn = new Button[n, n];
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
int p = 60 * i + 100;
int q = 60 * j + 100;
btn[i, j] = new Button();
btn[i, j].Location = new Point(p, q);
btn[i, j].Size = new Size(60, 60);
int[,] valueBtn = new int[n, n];
valueBtn[i, j] = 0;
this.Controls.Add(btn[i, j]);
}
}
btn[i, j].Click += btnPress;
}
Next I have a new method btnPress which is linked to the EventHandler btn[i, j].Click. The intention is that in this method I find out which button has been pressed, and which coordinates/index belongs to this so that I can find the corresponding value in the 2d array valueBtn and eventually draw this value in a new function drawValue.
public void btnPress(object sender, EventArgs ea)
{
Button pressedBtn = sender as Button;
// Here I want to know which button is pressed and the index [i,j] of the button
// so that I can find the value that belongs to the button in the 2d valueBtn array
.
.
.
this.Paint += drawValue;
}
I've tried a lot with references to the EventHandler, but I just can't figure it out.
Thank you very much in advance for your time and help!
You can set the Text property of each button like btn[i, j].Text = some i j combination. and then get it in btnPress method like this string s = (sender as Button).Text;. You can also use Tag property, so basically concept is same.
I have code that creates a row of 5 pictureboxes at runtime. I have added (I think) the code to add a click event handler to each picturebox as it is created.
int xPos = 95;
for (int index = 0; index < 5; index++)
{
keepImage[index] = new PictureBox();
keepImage[index].Width = 120;
keepImage[index].Height = 41;
keepImage[index].Left = xPos;
keepImage[index].Top = 360;
keepImage[index].Click += new EventHandler(keepImage_Click);
keepImage[index].BackColor = Color.Transparent;
keepImage[index].SizeMode = PictureBoxSizeMode.CenterImage;
this.Controls.Add(keepImage[index]);
xPos += 125;
}
The code works - it creates and displays the pictureboxes. I have been looking on here to find out how to find which one of the pictureboxes is clicked on...
public void keepImage_Click(object sender, EventArgs e)
{
PictureBox index = sender as PictureBox;
// identify which button was clicked and perform necessary actions
Debug.Write(index);
}
This code was taken from a solution found on here, but how do I adapt it for my needs? I have tried but so far, no luck.
At runtime the debug shows System.Windows.Forms.PictureBox, SizeMode: CenterImage but not the actual index.
Thanks for any suggestions.
EDIT
After trying one of the solutions mentioned in the comments, I now get the following error...
You can follow second approach from Get the index of array of picturebox clicked. But there is a typo issue with this answer it should be (sender as PictureBox).
So in your case, you can use Control.Tag property to store index of pictures as:
int xPos = 95;
for (int index = 0; index < 5; index++)
{
//Other codes
keepImage[index].Tag = index; //Set tag from index
this.Controls.Add(keepImage[index]);
xPos += 125;
}
Then click event would be like:
public void keepImage_Click(object sender, EventArgs e)
{
int index = int.Parse((sender as PictureBox).Tag.ToString());
Debug.Write(index);
}
Is there any way to dynamically create and display 'n' Labels with 'n' corresponding Textboxs when we know value of 'n' after for example, clicking "Display" button.
Let me know if anything make you don't understand my question. Thank you!
I am working with VS C# Express 2010 Windows Form.
I would create a user control which holds a Label and a Text Box in it and simply create instances of that user control 'n' times. If you want to know a better way to do it and use properties to get access to the values of Label and Text Box from the user control, please let me know.
Simple way to do it would be:
int n = 4; // Or whatever value - n has to be global so that the event handler can access it
private void btnDisplay_Click(object sender, EventArgs e)
{
TextBox[] textBoxes = new TextBox[n];
Label[] labels = new Label[n];
for (int i = 0; i < n; i++)
{
textBoxes[i] = new TextBox();
// Here you can modify the value of the textbox which is at textBoxes[i]
labels[i] = new Label();
// Here you can modify the value of the label which is at labels[i]
}
// This adds the controls to the form (you will need to specify thier co-ordinates etc. first)
for (int i = 0; i < n; i++)
{
this.Controls.Add(textBoxes[i]);
this.Controls.Add(labels[i]);
}
}
The code above assumes that you have a button btnDisplay and it has a onClick event assigned to btnDisplay_Click event handler. You also need to know the value of n and need a way of figuring out where to place all controls. Controls should have a width and height specified as well.
To do it using a User Control simply do this.
Okay, first of all go and create a new user control and put a text box and label in it.
Lets say they are called txtSomeTextBox and lblSomeLabel. In the code behind add this code:
public string GetTextBoxValue()
{
return this.txtSomeTextBox.Text;
}
public string GetLabelValue()
{
return this.lblSomeLabel.Text;
}
public void SetTextBoxValue(string newText)
{
this.txtSomeTextBox.Text = newText;
}
public void SetLabelValue(string newText)
{
this.lblSomeLabel.Text = newText;
}
Now the code to generate the user control will look like this (MyUserControl is the name you have give to your user control):
private void btnDisplay_Click(object sender, EventArgs e)
{
MyUserControl[] controls = new MyUserControl[n];
for (int i = 0; i < n; i++)
{
controls[i] = new MyUserControl();
controls[i].setTextBoxValue("some value to display in text");
controls[i].setLabelValue("some value to display in label");
// Now if you write controls[i].getTextBoxValue() it will return "some value to display in text" and controls[i].getLabelValue() will return "some value to display in label". These value will also be displayed in the user control.
}
// This adds the controls to the form (you will need to specify thier co-ordinates etc. first)
for (int i = 0; i < n; i++)
{
this.Controls.Add(controls[i]);
}
}
Of course you can create more methods in the usercontrol to access properties and set them. Or simply if you have to access a lot, just put in these two variables and you can access the textbox and label directly:
public TextBox myTextBox;
public Label myLabel;
In the constructor of the user control do this:
myTextBox = this.txtSomeTextBox;
myLabel = this.lblSomeLabel;
Then in your program if you want to modify the text value of either just do this.
control[i].myTextBox.Text = "some random text"; // Same applies to myLabel
Hope it helped :)
Here is a simple example that should let you keep going add somethink that would act as a placeholder to your winform can be TableLayoutPanel
and then just add controls to it
for ( int i = 0; i < COUNT; i++ ) {
Label lblTitle = new Label();
lblTitle.Text = i+"Your Text";
youlayOut.Controls.Add( lblTitle, 0, i );
TextBox txtValue = new TextBox();
youlayOut.Controls.Add( txtValue, 2, i );
}
Suppose you have a button that when pressed sets n to 5, you could then generate labels and textboxes on your form like so.
var n = 5;
for (int i = 0; i < n; i++)
{
//Create label
Label label = new Label();
label.Text = String.Format("Label {0}", i);
//Position label on screen
label.Left = 10;
label.Top = (i + 1) * 20;
//Create textbox
TextBox textBox = new TextBox();
//Position textbox on screen
textBox.Left = 120;
textBox.Top = (i + 1) * 20;
//Add controls to form
this.Controls.Add(label);
this.Controls.Add(textBox);
}
This will not only add them to the form but position them decently as well.
You can try this:
int cleft = 1;
intaleft = 1;
private void button2_Click(object sender, EventArgs e)
{
TextBox txt = new TextBox();
this.Controls.Add(txt);
txt.Top = cleft * 40;
txt.Size = new Size(200, 16);
txt.Left = 150;
cleft = cleft + 1;
Label lbl = new Label();
this.Controls.Add(lbl);
lbl.Top = aleft * 40;
lbl.Size = new Size(100, 16);
lbl.ForeColor = Color.Blue;
lbl.Text = "BoxNo/CardNo";
lbl.Left = 70;
aleft = aleft + 1;
return;
}
private void btd_Click(object sender, EventArgs e)
{
//Here you Delete Text Box One By One(int ix for Text Box)
for (int ix = this.Controls.Count - 2; ix >= 0; ix--)
//Here you Delete Lable One By One(int ix for Lable)
for (int x = this.Controls.Count - 2; x >= 0; x--)
{
if (this.Controls[ix] is TextBox)
this.Controls[ix].Dispose();
if (this.Controls[x] is Label)
this.Controls[x].Dispose();
return;
}
}
I am trying to write a code in order to create dynamic textboxes.
I have Function class and have a second form in my program named ProductForm.cs
What I wanna do is to read some data with a function named GetSpecs in my Function.cs and than inside GetSpecs I want to call a function in another class and send data to my other function under ProductForm.cs class.
I am getting blank form at the end.
a part of my GetSpecs function:
private String GetSpecs(String webData)
{
......
ProductForm form2 = new ProductForm();
form2.CreateTextBox(n);
}
ProductForm.cs
public void CreateTextBox(int i)
{
ProductForm form2 = new ProductForm();
form2.Visible = true;
form2.Activate();
int x = 10;
int y = 10;
int width = 100;
int height = 20;
for (int n = 0; n < i; n++)
{
for (int row = 0; row < 4; row++)
{
String name = "txtBox_" + row.ToString();
TextBox tb = new TextBox();
tb.Name = name;
tb.Location = new Point(x, y);
tb.Height = height;
tb.Width = width + row * 2;
x += 25 + row * 2;
this.Controls.Add(tb);
}
y += 25;
}
}
I get a blank form of ProductForm. Textboxes are not created or I cannot see them.
If I put textbox inside
private void ProductForm_Load(object sender, EventArgs e)
I can see textboxes.
You're creating showing a brand new ProductForm instance (in the form2 variable), then adding controls to this (which is never shown).
You are adding the controls to the current form: this.Controls.Add(tb);, you need to add them to the other form:
form2.Controls.Add(tb);
So I need a way for when a person clicks on a textbox inan 8x8 grid of textboxes, the text in the textbox they have clicked on is changed to something. My grid is set up in a variable called textboxes[,] so if you type textboxes[0,0] you get the first box in the grid. As of now, with my very limited knowledge, I have this.
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
textboxes[i, j].Click += new EventHandler(textboxes_Click);
}
}
Then I can handle whenever one of the boxes is clicked. If you have a better way of doing this, I would love to hear it.I just dont know how to access the box that was clicked, mainly the text. Hope I have explained this well enough. Thanks for all the help!
-Lewis
Your approach is good. You only have to define some additional information to handle it in the event, as follows:
We can define a class to store the textbox position:
public class GridIndex
{
//stores the position of a textbox
public int ipos { get; set; }
public int jpos { get; set; }
}
Your piece of code sightly modified:
for (int i = 0; i < 8; i++)
for (int j = 0; j < 8; j++)
{
textboxes[i, j].Click += new System.EventHandler(this.textBox_Click);
textboxes[i, j].Tag = new GridIndex() { ipos = i, jpos = j };
}
And then your handler:
private void textBox_Click(object sender, EventArgs e)
{
TextBox textBox = sender as TextBox;
if (textBox != null)
{
//Here your have the text of the clicked textbox
string text = textBox.Text;
//And here the X and Y position of the clicked textbox
int ipos = (textBox.Tag as GridIndex).ipos;
int jpos = (textBox.Tag as GridIndex).jpos;
}
}
Edit: I did some changes to the code, please, review.
Your EventHandler has an object called sender as parameter. You have to cast it to an TextBox, then you can get the text of the textbox.
Your event handler has the signature:
void Handler(object sender, EventArgs args)
Where sender is a reference to the TextBox that was clicked. If you also need to know i * j at this point I'd created a class that derives from TextBox which has those numbers stored within it.
You can get the text box values by writting the following code
TextBox txt= (TextBox)sender;
string text = txt.Text.ToString();
MessageBox.show(text);
Hope this will be help full for u