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TextBox.Render Method

Renders the TextBox control to the specified HtmlTextWriter object.

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

protected internal override void Render (
	HtmlTextWriter writer
)
protected void Render (
	HtmlTextWriter writer
)
protected internal override function Render (
	writer : HtmlTextWriter
)

Parameters

writer

The HtmlTextWriter that receives the rendered output.

The Render method renders the begin tag and end tag of the TextBox control to the HtmlTextWriter object for output on the client. If the TextMode property is set to MultiLine, the content of the TextBox control is rendered as an HTML <textarea> element.

The Render method is used primarily by control developers extending the functionality of the TextBox control.

The following code example demonstrates how to override the Render method in a custom server control so that the TextBox control is always displayed with an image.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<HTML>
	<HEAD>
		<title>Custom TextBox - Render - C# Example</title>
	</HEAD>
	<body>
		<form id="Form1" method="post" runat="server">
			<h3>Custom TextBox - Render - C# Example</h3>
			
			<aspSample:CustomTextBoxRender 
			  id="TextBox1" 
			  runat="server">Hello World!
			</aspSample:CustomTextBoxRender>
			
		</form>
	</body>
</HTML>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
	<HEAD>
		<title>Custom TextBox - Render - VJ# Example</title>
	</HEAD>
	<body>
		<form id="Form1" method="post" runat="server">
			<h3>Custom TextBox - Render - VJ# Example</h3>
			
			<aspSample:CustomTextBoxRender 
			  id="TextBox1" 
			  runat="server"
			  text="Hello World!">
			</aspSample:CustomTextBoxRender>
			
		</form>
	</body>
</HTML>

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

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomTextBoxRender : System.Web.UI.WebControls.TextBox
  {
    protected override void Render(System.Web.UI.HtmlTextWriter writer)
    {
      // Create and render a new Image Web control.
      System.Web.UI.WebControls.Image image = new System.Web.UI.WebControls.Image();
      image.ID = "Image1";
      image.ImageUrl = "image.jpg";	
      image.AlternateText = "Image for TextBox1.";
      image.RenderControl(writer);

      // Create a BR tag.
      writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Br);

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

package Samples.AspNet.JSL.Controls; 

public class CustomTextBoxRender
    extends System.Web.UI.WebControls.TextBox
{
    protected void Render(System.Web.UI.HtmlTextWriter writer)
    {
        // Create and render a new Image Web control.
        System.Web.UI.WebControls.Image image = new System.Web.UI.
            WebControls.Image();
        image.set_ID("Image1");
        image.set_ImageUrl("image.jpg");
        image.set_AlternateText("Image for TextBox1.");
        image.RenderControl(writer);
        // Create a BR tag.
        writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Br);
        // Call the base class's Render method.
        super.Render(writer);
    } //Render
} //CustomTextBoxRender

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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