I'm trying to dynamically add 5 buttons to my custom module but I get an error saying that they have the same ID, but they don't, I notice that the page_load is called a lot of times, why is it called so many times?

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)

Try

Dim objModules As ModuleController = New ModuleController

If Not Page.IsPostBack Then

If (Not (CType(Settings("showform"), String)) Is Nothing) Then

If (CType(Settings("showform"), String) = "No") Then

' Do not allow messages to be added

FormView1.Visible = False

lblAddMessage.Visible = False

End If

End If

Dim n As Integer = 0

For n = 0 To 5

Dim b As Button = New Button()

b.ID = "MyBtn" & n

b.Text = n.ToString

BtnPlaceHolder.Controls.Add(b)

Next

Else

Me.GridView1.DataBind()

End If

Catch ex As Exception

Exceptions.ProcessModuleLoadException(Me, ex)

End Try

End Sub

So if you always want five buttons, I'm not sure why you wouldn't just put five buttons on your design surface.  If you want to do it in code, though, you certainly can.

Remember, VB is zero based, so in your example, you are setting n=0 and then looping from 0 to 5.  This will actually give you six buttons since 0 counts.  I presume you really want the buttons to be 1-5 so here's how you do it.

     Dim n As Integer = 1
     For n = 1 To 5
         Dim b As Button = New Button()
         b.ID = "MyBtn" & CType(n, String)
         b.Text = n.ToString
         BtnPlaceHolder.Controls.Add(b)
     Next

You could also do this, but if you do, your button text will start with 0.