Get event dispacher from event argument : Events « ASP.net Controls « ASP.NET Tutorial
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- ASP.net Controls
- Events
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="EventTracker" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>List of events:</h3>
<asp:ListBox id="lstEvents"
runat="server"
Height="107px"
Width="355px">
</asp:ListBox><br/>
<br/><br/>
<h3>Controls being monitored for change events:</h3>
<asp:TextBox id="txt"
runat="server"
AutoPostBack="True"
OnTextChanged="CtrlChanged"></asp:TextBox><br/>
<br/>
<asp:CheckBox id="chk"
runat="server"
AutoPostBack="True"
OnCheckedChanged="CtrlChanged">
</asp:CheckBox><br/>
<br/>
<asp:RadioButton id="opt1"
runat="server"
GroupName="Sample"
AutoPostBack="True"
OnCheckedChanged="CtrlChanged">
</asp:RadioButton>
<asp:RadioButton id="opt2"
runat="server"
GroupName="Sample"
AutoPostBack="True"
OnCheckedChanged="CtrlChanged">
</asp:RadioButton>
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class EventTracker : System.Web.UI.Page
{
protected void CtrlChanged(Object sender, EventArgs e)
{
string ctrlName = ((Control)sender).ID;
lstEvents.Items.Add(ctrlName + " Changed");
lstEvents.SelectedIndex = lstEvents.Items.Count - 1;
}
}