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CheckBox.OnPreRender Method

This API 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
)

Parameters

e
Type: System.EventArgs

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>
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;
        }
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
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