HtmlInputButton.OnPreRender Method
.NET Framework 3.0
Raises the OnPreRender event and registers client script for generating postback.
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 always displays a custom HtmlInputButton control with bold text.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<!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>
<title>Custom HtmlInputButton - OnPreRender - VJ# Example</title>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
HtmlInputButton1.get_Attributes().Add("onclick",
"alert('Hello client-side world.');");
} //Page_Load
void HtmlInputButton1_ServerClick(Object sender, EventArgs e)
{
Div1.set_InnerHtml("Hello server-side world.");
} //HtmlInputButton1_ServerClick
</script>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom HtmlInputButton - OnPreRender - VJ# Example</h3>
<aspSample:CustomHtmlInputButtonOnPreRender
id="HtmlInputButton1"
runat="server"
type="button"
onserverclick="HtmlInputButton1_ServerClick"
value="Html Input Button"
name="HtmlInputButton1">
<div id="Div1" runat="server"
style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px" />
</form>
</body>
</html>
package Samples.AspNet.JSL.Controls;
public class CustomHtmlInputButtonOnPreRender
extends System.Web.UI.HtmlControls.HtmlInputButton
{
protected void OnPreRender(System.EventArgs e)
{
// Call the base OnPreRender method.
super.OnPreRender(e);
// Always display the HtmlButton with bold text.
this.get_Style().Add("font-weight", "bold");
} //OnPreRender
} //CustomHtmlInputButtonOnPreRender
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