HtmlInputRadioButton.OnPreRender Method
.NET Framework 2.0
Raises the PreRender event and registers the HtmlInputRadioButton control as one that requires postback handling.
Namespace: System.Web.UI.HtmlControls
Assembly: System.Web (in system.web.dll)
Assembly: System.Web (in system.web.dll)
The following code example demonstrates how to override the OnPreRender method so that it adds a Title attribute in a custom HtmlInputRadioButton server control.
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<HTML>
<HEAD><title>Custom HtmlInputRadioButton - OnPreRender - VJ# Example</title>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
Div1.set_InnerHtml("");
} //Page_Load
void HtmlInputRadioButtonGroup1_ServerChange(Object sender,
System.EventArgs e)
{
// Diplay the value of the selected HtmlInputRadioButton control.
System.Web.UI.HtmlControls.HtmlInputRadioButton
htmlInputRadioButtonGroup1 = (System.Web.UI.HtmlControls.
HtmlInputRadioButton)sender;
Div1.set_InnerHtml("You change your selection to: "
+ htmlInputRadioButtonGroup1.get_Value());
} //HtmlInputRadioButtonGroup1_ServerChange
</script>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom HtmlInputRadioButton - OnPreRender - VJ# Example</h3>
<aspSample:CustomHtmlInputRadioButtonOnPreRender
id="HtmlInputRadioButton1"
name="HtmlInputRadioButtonGroup1"
runat="server"
type="radio" checked
onserverchange="HtmlInputRadioButtonGroup1_ServerChange"
value="HtmlInputRadioButton1">HtmlInputRadioButton1
</aspSample:CustomHtmlInputRadioButtonOnPreRender>
<br>
<aspSample:CustomHtmlInputRadioButtonOnPreRender
id="HtmlInputRadioButton2"
name="HtmlInputRadioButtonGroup1"
runat="server"
type="radio"
onserverchange="HtmlInputRadioButtonGroup1_ServerChange"
value="HtmlInputRadioButton2">HtmlInputRadioButton2
</aspSample:CustomHtmlInputRadioButtonOnPreRender>
<p>
<input type="submit" value="Submit" id="Submit1" name="Submit1" runat="server">
</p>
<DIV
id="Div1"
runat="server"
style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px"
ms_positioning="FlowLayout" />
</form>
</body>
</HTML>
package Samples.AspNet.JSL.Controls;
public class CustomHtmlInputRadioButtonOnPreRender
extends System.Web.UI.HtmlControls.HtmlInputRadioButton
{
protected void OnPreRender(System.EventArgs e)
{
// Run the OnPreRender method on the base class.
super.OnPreRender(e);
// Add a Title attribute.
this.get_Attributes().Add("title", "Option " + this.get_Value());
} //OnPreRender
} //CustomHtmlInputRadioButtonOnPreRender
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
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