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TextBox.AddAttributesToRender Method

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

Adds HTML attributes and styles that need to be rendered to the specified HtmlTextWriter instance.

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

protected override void AddAttributesToRender(
	HtmlTextWriter writer


Type: System.Web.UI.HtmlTextWriter

An HtmlTextWriter that represents the output stream to render HTML content on the client.

This method is used primarily by control developers to insert the additional attributes and styles to the HtmlTextWriter output stream for a TextBox control. This method overrides WebControl.AddAttributesToRender.

The following code example demonstrates how to override the AddAttributesToRender method in a custom server control, so that the TextBox control text always appears bold.

Security noteSecurity Note:

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
<html xmlns="" >
        <title>Custom TextBox - AddAttributesToRender - C# Example</title>
        <form id="Form1" method="post" runat="server">
            <h3>Custom TextBox - AddAttributesToRender - C# Example</h3>

              runat="server">Hello World!

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

namespace Samples.AspNet.CS.Controls
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomTextBoxAddAttributesToRender : System.Web.UI.WebControls.TextBox
    protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer)
      // Show the TextBox text as Bold.
      writer.AddStyleAttribute(System.Web.UI.HtmlTextWriterStyle.FontWeight, "bold");

      // Call the base AddAttributesToRender method. 

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0