DropDownList in UpdatePanel

Question

In my project I have placed a dropdownlist in an updatepanel.what I wanted to do is to select a value from dropdownlist and use it in a session.

but whatever I do, it

Answer 1

thanks a lot I solved problem by controlling variables in Page_Load event.

If Label1.Text = 1 Then
    Dim tempcontrol2 As Control = LoadControl("Page1.ascx")
    PlaceHolder1.Controls.Add(tempcontrol2)

ElseIf Label1.Text = 2 Then
    Dim tempcontrol2 As Control = LoadControl("Page2.ascx")
    PlaceHolder1.Controls.Add(tempcontrol2)
End If

thank u for all answers