Creating controls on the fly

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

I want to create controls on fly. Specifically, I want to create some
ASP.Net Link Buttons dynamically. They would also need click events written
on the fly also. I'm pretty sure you can create controls on the fly but not
sure about events. Does anyone know? Anyone have any examples?
 
Cor,

I notice the "Adding EventHandlers example" works as you posted it but when
I put the code to dynamically create the control on a button click, the event
handler doesn't execute when I click it. Do you know why?

For example:

Private Sub Page_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyBase.Load

End Sub
Private Sub mybutton_Click _
(ByVal sender As Object, ByVal e As System.EventArgs)
Dim mylabel As New Label
Me.Panel1.Controls.Add(New LiteralControl("<BR><BR>"))
Me.Panel1.Controls.Add(mylabel)
mylabel.Text = "The day is: " & DirectCast(sender, Button).Text
End Sub


Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Dim mybutton As Button
Dim i As Integer
For i = 0 To New Date().DaysInMonth _
(New Date().Year, New Date().Month) - 1
mybutton = New Button
mybutton.BackColor = Drawing.Color.White
mybutton.Text = (i + 1).ToString
mybutton.Width = New Unit(30)
Me.Panel1.Controls.Add(mybutton)
AddHandler mybutton.Click, AddressOf mybutton_Click
If (i + 1) Mod 5 = 0 Then
Me.Panel1.Controls.Add(New LiteralControl("<BR>"))
End If
Next
End Sub
 
Clear-RCIC,

There is nothing in the ASPX page (let say the template) and it is therefore
by every visit build new. What you want can you do by instance like this.

\\\\
Private Sub Page_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
If CBool(Session.Item("set")) Then
Button1_Click(Nothing, Nothing)
End If
End Sub
Private Sub mybutton_Click _
(ByVal sender As Object, ByVal e As System.EventArgs)
Dim mylabel As New Label
Me.Panel1.Controls.Add(New LiteralControl("<BR><BR>"))
Me.Panel1.Controls.Add(mylabel)
mylabel.Text = "The day is: " & DirectCast(sender, Button).Text
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
Dim mybutton As Button
Dim i As Integer
For i = 0 To New Date().DaysInMonth _
(New Date().Year, New Date().Month) - 1
Session.Item("set") = True
mybutton = New Button
mybutton.BackColor = Drawing.Color.White
mybutton.Text = (i + 1).ToString
mybutton.Width = New Unit(30)
Me.Panel1.Controls.Add(mybutton)
AddHandler mybutton.Click, AddressOf mybutton_Click
If (i + 1) Mod 5 = 0 Then
Me.Panel1.Controls.Add(New LiteralControl("<BR>"))
End If
Next
Button1.Visible = False
End Sub
///
I hope this helps,

Cor
 
Thanks. That seems to work but I don't understand why. It looks like you
are setting a boolean with :
Session.Item("set")

But I don't see what calling the button and passing "Nothing" does:
Button1_Click(Nothing, Nothing)
 
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