Click event cannot be fired on buttons created dynamically in VB.Net ASP.Net

Question

I'm creating a code in Page_PreRender function to dynamically creates some labels and buttons:

Dim btnExcludeDr As New Button()
btnExcludeDr.ID = "btnExcludeDr"
btnExcludeDr.Text = "Rate Driver"
form1.Controls.Add(btnExcludeDr)
AddHandler btnExcludeDr.Click, AddressOf Me.cmdExcludeDrv_Click

And the event which must be fired for each btnExcludeDr button is:

Protected Sub cmdExcludeDrv_Click(ByVal sender As Object, ByVal e As System.EventArgs)
   MsgBox("hello")
End Sub

But the event is not fired. Do you have any solution? thank you !

umutesen · Accepted Answer · 2016-10-21 08:51:59Z

1

The best place to create your dynamic controls is in the Page_Init function that the page code-behind class provides.

Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit
    Dim btnExcludeDr As New Button()
    btnExcludeDr.ID = "btnExcludeDr"
    btnExcludeDr.Text = "Rate Driver"
    form1.Controls.Add(btnExcludeDr)
    AddHandler btnExcludeDr.Click, AddressOf Me.cmdExcludeDrv_Click
End Sub


Protected Sub cmdExcludeDrv_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    MsgBox("hello")
End Sub

edited Oct 21, 2016 at 8:51

answered Oct 21, 2016 at 8:41

umutesen

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4 Comments

Abdelouhab ELKADIRI Over a year ago

Page_Load or Page_Init ?? I saw you created it in Page_Load !

umutesen Over a year ago

Method signature does not matter - the compiler only cares about Me.PreInit. I have changed the method signature label to reflect this.

Abdelouhab ELKADIRI Over a year ago

I asked you because the code I have in my page contains both of these two methods (Page_Init and Page_Load) and they don't have Handles Me.PreInit !

umutesen Over a year ago

You can use Page_event convention when you have AutoEventWireup decleration configured in aspx view. Please see this for more information msdn.microsoft.com/en-us/library/6w2tb12s.aspx

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