I'd like to raise an event in a user control and handle it on the parent form. I've gotten this to work in communicating from the parent form to the user control. But I don't know how, in the user control, to declare the event on the parent form. And I can't use a derived class/base class because based events can't be raised from derived...
So, here's a workaround, but it doesn't work....the event that is raised is not being picked up by the user control....
===================MAIN PAGE ==========================
=
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Main.aspx.vb" Inherits="Main" %>
<%@ Register Src="UC1.ascx" TagName="UC1" TagPrefix="uc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="
http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<uc1:UC1 ID="UC1_1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="Button" /></div>
</form>
</body>
</html>
‘===================MAIN PAGE CODE BEHIND ================
Partial Class Main
Inherits System.Web.UI.Page
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim exeDM As New EH
exeDM.SendEvent()
End Sub
End Class
‘===================USER CONTROL ================
<%@ Control Language="VB" AutoEventWireup="false" CodeFile="UC1.ascx.vb" Inherits="UC1" %>
Partial Class UC1
Inherits System.Web.UI.UserControl
Private EH1 As New EH
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
AddHandler EH1.Event2, AddressOf ReceiveEvent
End Sub
Private Sub ReceiveEvent(ByVal sender As Object, ByVal e As CommandEventArgs)
MsgBox("received")
End Sub
End Class
‘================ HELPER CLASS =====================
Imports Microsoft.VisualBasic
Public Class EH
Public Event Event2 As CommandEventHandler
Public Sub SendEvent()
Dim args As New CommandEventArgs("Event2",
"EventMessage")
RaiseEvent Event2(Me, args)
End Sub
End Class
‘=========================
==========
==========
====
Any guidance on this would be appreciated.
Thanks!
Let's say you have a textbox (named txtSomeText as an example) in the user control and you want to manipulate it based on a button click event from elsewhere on the page. In your *user control*, do this in the codebehind:
Public ReadOnly Property SomeText() As TextBox
Get
Return Me.txtSomeText
End Get
End Property
Then in your button click event you can get to the textbox like this:
Me.UserControlName.SomeTex
John