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Old 03-31-2012, 06:19 AM
neo_matrix neo_matrix is offline
Join Date: Mar 2009
Posts: 31
Default 15 textboxes want to use 5 only ?!?!

Hi all, does anyone know why this is not working for me?

I have 15 textboxes i want to put 5 random numbers from 1 to 48 in 5 of this textboxes.

my CODE:

Dim lstInt As New List(Of Integer)
Dim lstTB As New List(Of TextBox)
Dim rndm As New Random

For Each ctrl In Controls.OfType(Of TextBox)()

Private Sub btdraw1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btdraw1.Click
Dim lstPicked As New List(Of Integer)

For i As Integer = 1 To 48
Dim index As Integer = rndm.Next(0, lstInt.Count)

For i As Integer = 0 To 5
CType(lstTB(i), TextBox).Text = lstPicked(i).ToString

AM I DOING SOMETHING WRONG THERE error message what i get is this:
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

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Old 03-31-2012, 09:11 AM
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Gruff Gruff is offline
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Inside your loop 1 to 48 you are trying to grab a value from lstInt() when lstInt is empty. You can easily see this if you step through your code in debug mode.
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