How can I make textbox(n).text in visualbasic.net ?

[popeyb]

I'm a beginner in visualbasic.net
I've 50 textbox from 1 to 50 and my question is how can get a value o show a value in a specific textbox?
for example the user enter a number to a text box and I save the user's number to variable X
now I need to show in textbo(x) the number which enered the user or get the value of textbox(x).
Do I need a array of 50 textboxes? how?
please help me on this

[Frinavale]

It would probably be easiest to use an array or generic List(Of TextBoxe) for this project.

I would not drag/drop 50 TextBoxes onto the window.
I would declare a private collection of TextBoxes as a member that is part of the VB.NET code-behind. I would initialize it in the the Load event. After initalizing the collection of TextBoxes, I would add them to the window/page/user-control...say in a Panel that is already part of the window/page/user-control so that I know where they'll end up.

For example:

Class AWindow

  Private _textBoxes As List(Of TextBox)
  
  Public Sub AWindow(ByVal sender As Object, ByVal e As EventArgs) Handles AWindow.Loaded
    _textBoxes = new List(Of TextBox)
    For i As Integer = 0 to 49
      Dim aTextBox As New TextBox
      _textBoxes.Add(aTextBox)
     myPanel.Add(aTextBox) 'myPanel is part of the page
    Next
  End Sub
End Class

Now when the user types a number, you can enter that number into the corresponding TextBox... eg:_textBoxes(user ProvidedNumber) = value.



-Frinny

[popeyb]

Thanks for ur help
sorry but as I said I'm a beginner...
I use visual basic 2010 express
I've already draged and drop 50 textboxes and renamed them to a1...a50
Still should I use your code? where should I write them? in button_click or public class or textbox keypress?????
It would be really helpfull if you could help me more on this...
thanks mate

[Frinavale]

Okay, so you dragged 50 TextBoxes onto the page...

Your code wont be as neat and tidy as the code I suggested but it will work just the same.

Instead of accessing the TextBox in the array at the index that the user provided...have a Select Case or If block that checks the number that the user entered and sets the appropriate TextBox.

The code that I posted would be placed in .vb file that is part of your window. Double click on your window to get to it... but you don't need to use it if you aren't comfortable with it...you could do as I just suggested with the Select Case or If blocks.

-Frinny

[popeyb]

Thanks man

Finally, I could finish it by select case...it took a lot of work but it works perfectly...nex t time I will take a shorter code.
Here I've another question if u could help me again
I need to restart the prgorams from beginig so I can use it for a clear/reset button and in case of error
is there any command that I can use for example

If String.IsNullOr Empty(TextBox1. Text) Then 'restart prgorm'
so I can prevent the visual basic run the next line by restaring program and take it to the begining of form.
hope u got what I meaning

[Frinavale]

I'm not following you...

If you want to clear the TextBoxes, then go through each of them and set their Text property to an empty string.

What I'm not sure of is why you are checking a TextBox's Text property during this process...?

-Frinny

[popeyb]

Sorry dude
I had some internet problem these days...
forget about everything let's focus on this:

I need to restart the program...is ther anyway to do so?

[Frinavale]

Well, one approach would be to use the Shell function to open your program....and after it's opened, close the current instance of the program.

[balame2004]

Better to use LINq query to access controls collection

[Frinavale]

balame2004,

Popeyb has chosen not to use collections of controls in the solution ;)

-Frinny

[popeyb]

still have this problem and I don't know how to solve it...
I nees to restar the prgoram from begeining...