Mega Code Archive
Handling Postback Events
<![CDATA[
File: CustomLinkButton.cs
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace myControls
{
public class CustomLinkButton : WebControl, IPostBackEventHandler
{
public event EventHandler Click;
private string _Text;
public string Text
{
get { return _Text; }
set { _Text = value; }
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
string eRef = Page.ClientScript.GetPostBackClientHyperlink(this, String.Empty);
writer.AddAttribute(HtmlTextWriterAttribute.Href, eRef);
base.AddAttributesToRender(writer);
}
protected override HtmlTextWriterTag TagKey
{
get
{
return HtmlTextWriterTag.A;
}
}
protected override void RenderContents(HtmlTextWriter writer)
{
writer.Write(_Text);
}
public void RaisePostBackEvent(string eventArgument)
{
if (Click != null)
Click(this, EventArgs.Empty);
}
}
}
File: Default.aspx
<%@ Page Language="C#" %>
<%@ Register TagPrefix="custom" Namespace="myControls" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void CustomLinkButton1_Click(object sender, EventArgs e)
{
lblResults.Text = txtUserName.Text;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show CustomLinkButton</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label
id="lblUserName"
Text="User Name:"
AssociatedControlID="txtUserName"
Runat="server" />
<asp:TextBox
id="txtUserName"
Runat="server" />
<br /><br />
<custom:CustomLinkButton
id="CustomLinkButton1"
Text="Submit"
OnClick="CustomLinkButton1_Click"
runat="server" />
<hr />
<asp:Label
id="lblResults"
EnableViewState="false"
Runat="server" />
</div>
</form>
</body>
</html>
]]>