Concatenation in a VB.net loop.

Question

I'm not sure how to make concatenate inside a loop in the same way as this:

For x As Integer = 1 to 10
    Me.Button & x & .top = 0
Next

instead of:

Me.Button1.top = 0
...
Me.Button10.top = 0

Any suggestions would be much appreciated, Thanks :)

Answer 1

I recommend an array of buttons, my friend :)

It's been a while since I've done VB, but something like:

Dim buttons(10)
buttons(1) = Me.Button1
' Add other buttons here

For x As Integer = 1 to 10
  buttons(x).top = 0
Next

Better yet, if you are creating your buttons dynamically, just store the array of buttons instead of each button as a member of the form object.

Answer 2

To do this in VB you would have to add each of the buttons to a collection and then loop over the collection. Non dynamic languages don't have very many conventions for looping over variable variable names.

Answer 3

Maybe you can do something like this:

For x As Integer = 1 to 10 
    Me.FindControl("Button" & x).top = 0 
Next 

Answer 4

Or... no array

dim ButtonPrefix as string = "Button" 
dim myButton as Button
For x as Integer = 1 to 10
   myButton = me.FindControl(ButtonPrefix & x)
   myButton.top = 0
Next

Also, top isn't a valid member of Button. Did you mean text?

Answer 5

 Dim buttonarray(10) As Button
 Dim x As Integer

 buttonarray(0) = Button1
 buttonarray(1) = Button2
 'Etc

  For x = 0 To 10
     buttonarray(x).Top = 0
  Next