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CheckBox.OnPreRender Method

This method supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Registers client script for generating postback prior to rendering on the client if AutoPostBack is true.

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
)
Not applicable.

Parameters

e

An EventArgs that contains the event data.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page language="c#" %>
<!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 CheckBox - OnPreRender - C# Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom CheckBox - OnPreRender - C# Example</h3>

      <aspSample:CustomCheckBoxOnPreRender
        id="CheckBox1"
        runat="server"
        text="CheckBox1" />

    </form>
  </body>
</html>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page language="VJ#" %>
<!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 CheckBox - OnPreRender - VJ# Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom CheckBox - OnPreRender - VJ# Example</h3>

      <aspSample:CustomCheckBoxOnPreRender
        id="CheckBox1"
        runat="server"
        text="CheckBox1" />

    </form>
  </body>
</html>

using System.Web;
using System.Security.Permissions;

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

        // Display a LightGray BackColor for the CheckBox.
        this.BackColor = System.Drawing.Color.LightGray;
        }
    }
}

package  Samples.AspNet.JSL.Controls;

public class CustomCheckBoxOnPreRender
    extends System.Web.UI.WebControls.CheckBox
{
    protected void OnPreRender(System.EventArgs e)
    {
        // Run the OnPreRender method on the base class.
        super.OnPreRender(e);
        // Display a LightGray BackColor for the CheckBox.
        this.set_BackColor(System.Drawing.Color.get_LightGray());
    } //OnPreRender
} //CustomCheckBoxOnPreRender

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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