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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="ChangeEvents" %>
<!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>Change Events</title>
</head>
<body>
<form id="form1" runat="server" >
<div>
<select runat="server"
id="List1"
size="5" multiple
Name="List1"
onserverchange="List1_ServerChange">
<option>Option 1</option>
<option>Option 2</option>
</select>
<br/>
<input type="text"
runat="server"
ID="Textbox1"
Size="10"
Name="Textbox1"
OnServerChange="Ctrl_ServerChange"><br/>
<input type="checkbox"
runat="server"
ID="Checkbox1"
Name="Checkbox1"
OnServerChange="Ctrl_ServerChange">Option text<br/>
<input type="submit"
runat="server"
ID="Submit1"
Name="cmdSubmit"
value="Submit Query"
onserverclick="Submit1_ServerClick">
</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 ChangeEvents : System.Web.UI.Page
{
protected void Page_Load(object sender, System.EventArgs e)
{
if (!Page.IsPostBack)
{
List1.Items.Add("Option 3");
List1.Items.Add("Option 4");
List1.Items.Add("Option 5");
}
}
protected void Ctrl_ServerChange(object sender, System.EventArgs e)
{
Response.Write("<li>ServerChange detected for " + sender + "</li>");
}
protected void List1_ServerChange(object sender, EventArgs e)
{
Response.Write("<li>ServerChange detected for List1. " + "The selected items are:</li><br/>");
foreach (ListItem li in List1.Items)
{
if (li.Selected)
Response.Write(" - " + li.Value + "<br/>");
}
}
protected void Submit1_ServerClick(object sender, EventArgs e)
{
Response.Write("<li>ServerClick detected for Submit1.</li>");
}
}
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