I'm having a problem getting an Eventhandler to fire when wired up using
Addhandler. If I add the Eventhandler via an attribute inside the control
tag (OnButtonClicked="TestEventControl1_ButtonClicked")it works fine.
However if I wire up using Addhandler ( AddHandler
TestEventControl1.ButtonClicked, AddressOf
TestEventControl1_ButtonClicked)the eventhandler never gets called. Any
ideas?
Here's the code
<%@ Register TagPrefix="cc1" Namespace="BEControls" Assembly="BEControls" %>
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm2.aspx.vb"
Inherits="TestSite.WebForm2"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:Label id=Label1 runat="server">Label</asp:Label>
<cc1:TestEventControl id=TestEventControl1 runat="server" Text="Test Click Event"
OnButtonClicked="TestEventControl1_ButtonClicked" >
</cc1:TestEventControl>
</form>
</body>
</HTML>
Public Class WebForm2
Inherits System.Web.UI.Page
Protected WithEvents Label1 As System.Web.UI.WebControls.Label
Protected WithEvents TestEventControl1 As BEControls.TestEventControl
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
If Not IsPostBack Then
' The following does not work
AddHandler TestEventControl1.ButtonClicked, AddressOf
TestEventControl1_ButtonClicked
End If
End Sub
Protected Sub TestEventControl1_ButtonClicked(ByVal sender As Object,
ByVal e As EventArgs)
Label1.Text = "Click Event was Handled"
End Sub
End Class
// TestEventControl Code
Imports System.ComponentModel
Imports System.Web.UI
Public Class TestEventControl
Inherits System.Web.UI.WebControls.WebControl
Implements IPostBackEventHandler, INamingContainer
Public Event ButtonClicked As EventHandler
Dim _text As String
Property [Text]() As String
Get
Return _text
End Get
Set(ByVal Value As String)
_text = Value
End Set
End Property
Protected Overrides Sub Render(ByVal output As
System.Web.UI.HtmlTextWriter)
output.AddAttribute(HtmlTextWriterAttribute.Name, Me.UniqueID)
output.AddAttribute(HtmlTextWriterAttribute.Id, Me.UniqueID)
output.AddAttribute(HtmlTextWriterAttribute.Value, Me.UniqueID)
output.AddAttribute(HtmlTextWriterAttribute.Type, "image")
output.AddAttribute(HtmlTextWriterAttribute.Src,
"/TestSite/images/next.gif")
output.AddAttribute(HtmlTextWriterAttribute.Onclick,
Page.GetPostBackEventReference(Me, "selected"))
output.RenderBeginTag(HtmlTextWriterTag.Input)
output.RenderEndTag()
output.Write("<h1>" & [Text] & "</h1>")
End Sub
Public Sub OnButtonClicked(ByVal e As EventArgs)
RaiseEvent ButtonClicked(Me, e)
End Sub
Public Sub RaisePostBackEvent(ByVal eventArgument As String)
Implements System.Web.UI.IPostBackEventHandler.RaisePostBackEvent
OnButtonClicked(New EventArgs())
End Sub
End Class
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