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LinkButton.OnPreRender Method

Raises the PreRender event.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

protected internal override void OnPreRender (
	EventArgs e
)
protected void OnPreRender (
	EventArgs e
)
protected internal override function OnPreRender (
	e : EventArgs
)

Parameters

e

An EventArgs object that contains the event data.

The OnPreRender method notifies the LinkButton control to perform any necessary prerendering steps prior to saving view state and rendering content to the client.

The following code example demonstrates how to override the OnPreRender method so that a border is never displayed in a custom LinkButton control.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<HTML>
	<HEAD>
		<title>Custom LinkButton - OnPreRender - C# Example</title>
    <script runat="server">
      void LinkButton1_Command(Object sender, CommandEventArgs e) 
      {
        // Redirect to the Microsoft home page.
        Response.Redirect("http://www.microsoft.com/");
      }
    </script>
	</HEAD>
	<body>
		<form id="Form1" method="post" runat="server">
			<h3>Custom LinkButton - OnPreRender - C# Example</h3>
			
			<aspSample:CustomLinkButtonOnPreRender 
			  id="LinkButton1" 
			  runat="server" 
			  OnCommand="LinkButton1_Command" 
			  ToolTip="Microsoft Home">Microsoft Corp.
			</aspSample:CustomLinkButtonOnPreRender>
			
		</form>
	</body>
</HTML>
...using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomLinkButtonOnPreRender : System.Web.UI.WebControls.LinkButton
  {
    protected override void OnPreRender(System.EventArgs e)
    {
      // Run the OnPreRender method on the base class.
      base.OnPreRender(e);

      // Always display the LinkButton without a border.
      this.BorderWidth =  System.Web.UI.WebControls.Unit.Point(0);
    }
  }
}

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
	<HEAD>
		<title>Custom LinkButton - OnPreRender - VJ# Example</title>
    <script runat="server">
        void LinkButton1_Command(Object sender, CommandEventArgs e) 
        {
            // Redirect to the Microsoft home page.
            get_Response().Redirect("http://www.microsoft.com/");
        } //LinkButton1_Command
    </script>
	</HEAD>
	<body>
		<form id="Form1" method="post" runat="server">
			<h3>Custom LinkButton - OnPreRender - VJ# Example</h3>
			
			<aspSample:CustomLinkButtonOnPreRender 
			  id="LinkButton1" 
			  runat="server" 
			  OnCommand="LinkButton1_Command" 
			  ToolTip="Microsoft Home">Microsoft Corp.
			</aspSample:CustomLinkButtonOnPreRender>
			
		</form>
	</body>
</HTML>
...package Samples.AspNet.JSL.Controls;
 
public class CustomLinkButtonOnPreRender
    extends System.Web.UI.WebControls.LinkButton
{
    protected void OnPreRender(System.EventArgs e)
    {
        // Run the OnPreRender method on the base class.
        super.OnPreRender(e);
        // Always display the LinkButton without a border.
        this.set_BorderWidth(System.Web.UI.WebControls.Unit.Point(0));
    } //OnPreRender
} //CustomLinkButtonOnPreRender

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.

.NET Framework

Supported in: 2.0, 1.1, 1.0
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