Windows Form with Variable number of Fields

[jmarkus]

I would like to generate a Form using code based on a variable number of fields. Essentially I am creating code a simple dialog box which sometimes might have 5 fields and sometimes 15. Currently I only know how to manually set each field using:

Me.TextBox1 = New System.Windows.Forms.TextBox()
Me.Label1 = New System.Windows.Forms.Label()
Me.TextBox2 = New System.Windows.Forms.TextBox()
Me.Label2 = New System.Windows.Forms.Label()
.
.
.
etc...

But what I would really like is to index Me.TextBox? and Me.Label? so I can manipulate it in a loop.

Is this possible?

Thanks,
Jeff

 

[denimined]

You use the Load function to instantiate new controls - usually into a control array. (VB6) Once instantiated, you can set things up on the control properties, just like any other control. (Note that control arrays start from index 0.)

What we tend to do is define the controls for element 0, placing them on the form. Subsequent controls are placed in a vertical stack.
Finally, be sure to adjust your form size to accommodate the new controls.

iGrids = UBound(asctmRepGrid)
For iCurrent = 1 To iGrids
  Call Load(cmdTab(iCurrent))

  cmdTab(iCurrent).Top = cmdTab(iCurrent - 1).Top + cmdTab(iCurrent - 1).Height
  cmdTab(iCurrent).Caption = asctmRepGrid(iCurrent).cTabCaption
  cmdTab(iCurrent).Visible = True
Next

 

[denimined]

Crud - sorry. I thought I was in the VB6 forum.
Basically the same idea, but in .NET you do not have control arrays so you have to generated unique names for each of the new controls. Also, you need to define the address of the handler for the control.

There's an example here:
[tt]

http://stackoverflow.com/questions/11312239/how-to-programmatically-add-controls-to-a-form-in-vb-net

[/tt]

 

[Andrzejek]

You may also consider using a grid instead. DataGridView maybe?

Have fun.

---- Andy

A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station.

 

[jebenson]

Yes it is possible. Here's some code to get you started.

Dim tb(4) TextBox 'array of TextBox

For i As Integer = 0 to 4 'loop 5 times

tb(i) = New TextBox​

tb(i).Name = "TextBox" & i.ToString​

Me.Controls.Add(tb(i))​

tb(i).Left = 10​

If i = 0 Then

tb(i).Top = 10​

Else

tb(i).top = 10 + tb.Height * i​

EndIf​

tb(i).Show​

Next

This creates an array of 5 TextBox objects, instantiates them and adds them to the form. You can then access them in code with either the Name (TextBox0, TextBox1, etc.), or by the array (tb(0), tb(1), etc.).


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