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Button.AddAttributesToRender Method

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

Adds the attributes of the Button control to the output stream for rendering on the client.

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

protected override void AddAttributesToRender (
	HtmlTextWriter writer
)
protected void AddAttributesToRender (
	HtmlTextWriter writer
)
protected override function AddAttributesToRender (
	writer : HtmlTextWriter
)

Parameters

writer

An System.Web.UI.HtmlTextWriter that contains the output stream to render on the client.

The following code example demonstrates how to override the AddAttributesToRender method in a custom server control, so that the Button text always displays in red.

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

      <aspSample:CustomButtonAddAttributesToRender
        id="Button1"
        runat="server"
        Text="Button" />

    </form>
  </body>
</HTML>
...using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
    public sealed class CustomButtonAddAttributesToRender : System.Web.UI.WebControls.Button
    {
    protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer) 
    {
      // Add a client-side onclick event to the button.
      writer.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Onclick, "alert('Hello World');");

      // Update the text of the button to be shown in the color Red
      writer.AddStyleAttribute(System.Web.UI.HtmlTextWriterStyle.Color, "Red");

      // Call the base's AddAttributesToRender method
      base.AddAttributesToRender(writer);
    }
  }
}

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

      <aspSample:CustomButtonAddAttributesToRender
        id="Button1"
        runat="server"
        Text="Button" />

    </form>
  </body>
</HTML>
...package Samples.AspNet.JSL.Controls;

public class CustomButtonAddAttributesToRender 
    extends System.Web.UI.WebControls.Button
{
    protected void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer)
    {
        // Add a client-side onclick event to the button.
        writer.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Onclick, 
            "alert('Hello World');");
        // Update the text of the button to be shown in the color Red
        writer.AddStyleAttribute(System.Web.UI.HtmlTextWriterStyle.Color, 
            "Red");
        // Call the base's AddAttributesToRender method
        super.AddAttributesToRender(writer);
    } //AddAttributesToRender
} //CustomButtonAddAttributesToRender

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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