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HtmlButton.RenderAttributes Method

Renders the HtmlButton control's attributes to the specified HtmlTextWriter object.

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

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

Parameters

writer

The HtmlTextWriter that contains the output stream to render on the client.

The RenderAttributes method writes the onclick attribute of the rendered HtmlButton control, and then calls the base HtmlControl.RenderAttributes method.

The RenderAttributes method is used primarily by control developers extending the functionality of the HtmlButton control.

The following code example demonstrates how to override the RenderAttributes method in a custom server control so that a title is always displayed for the HtmlButton control.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<HTML>
  <HEAD>
    <title>Custom HtmlButton - RenderAttributes - C# Example</title>
    <script runat="server">
      void Page_Load(Object sender, EventArgs e)
      {
        HtmlButton1.Attributes.Add("onclick","alert('Hello client-side world.');");
      }

      void HtmlButton1_ServerClick(Object sender, EventArgs e)
      {
        Div1.InnerHtml = "Hello server-side world.";
      }
    </script>
  </HEAD>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom HtmlButton - RenderAttributes - C# Example</h3>

      <aspSample:CustomHtmlButtonRenderAttributes
        id="HtmlButton1"
        runat="server"
        type="button"
        onserverclick="HtmlButton1_ServerClick"
        name="HtmlButton1">Html Button</aspSample:CustomHtmlButtonRenderAttributes>&nbsp;&nbsp;

      <DIV id="Div1" runat="server"
        style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px"
        ms_positioning="FlowLayout" />
    </form>
  </body>
</HTML>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
  <HEAD>
    <title>Custom HtmlButton - RenderAttributes - VJ# Example</title>
    <script runat="server">
        
    void Page_Load(Object sender, EventArgs e)
    {
        HtmlButton1.get_Attributes().Add("onclick",
            "alert('Hello client-side world.');");
    } //Page_Load

    void HtmlButton1_ServerClick(Object sender, EventArgs e)
    {
        Div1.set_InnerHtml("Hello server-side world.");
    } //HtmlButton1_ServerClick
    </script>
  </HEAD>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom HtmlButton - RenderAttributes - VJ# Example</h3>

      <aspSample:CustomHtmlButtonRenderAttributes
        id="HtmlButton1"
        runat="server"
        type="button"
        onserverclick="HtmlButton1_ServerClick"
        name="HtmlButton1">Html Button</aspSample:CustomHtmlButtonRenderAttributes>&nbsp;&nbsp;

      <DIV id="Div1" runat="server"
        style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px"
        ms_positioning="FlowLayout" />
    </form>
  </body>
</HTML>

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

namespace Samples.AspNet.CS.Controls
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
    public sealed class CustomHtmlButtonRenderAttributes : System.Web.UI.HtmlControls.HtmlButton
    {
        protected override void RenderAttributes(System.Web.UI.HtmlTextWriter writer)
        {
            
            // Call the base class's RenderAttributes method.
            base.RenderAttributes(writer);

            // Write out the HtmlButton control's Title tag.
            writer.Write(" Title=\"Text from RenderAttributes.\"");
        }
    }
}

package Samples.AspNet.JSL.Controls;

public class CustomHtmlButtonRenderAttributes
    extends System.Web.UI.HtmlControls.HtmlButton
{
    protected void RenderAttributes(System.Web.UI.HtmlTextWriter writer)
    {

        // Call the base's RenderAttributes method.
        super.RenderAttributes(writer);

        // Write out Title tag
        writer.Write(" Title=\"Text from RenderAttributes.\"");

    } //RenderAttributes
} //CustomHtmlButtonRenderAttributes

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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