ImageButton.TagKey Property
Assembly: System.Web (in system.web.dll)
The TagKey property is used primarily by control developers when deriving a custom class from the ImageButton control.
Use the TagKey property to determine the HtmlTextWriterTag value associated with an ImageButton control. This property overrides the base implementation to always return HtmlTextWriterTag.Input.
The following code example demonstrates how to override the TagKey method in a custom ImageButton control so that it always returns an Input tag.
Note |
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| The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. The first part of the code sample must be copied into an empty text file that has an .aspx extension. The second part must be in a .cs file (for C#) or a .vb file (for Visual Basic). For more information on the Web Forms code model, see ASP.NET Web Page Code Model. |
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
<HEAD>
<title>Custom ImageButton - TagKey - VJ# Example</title>
<script runat="server">
void ImageButton1_Command(Object sender, CommandEventArgs e)
{
// Redirect to the Microsoft home page.
get_Response().Redirect("http://www.microsoft.com/");
} //ImageButton1_Command
</script>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom ImageButton - TagKey - VJ# Example</h3>
<aspSample:CustomImageButtonTagKey
id="ImageButton1"
runat="server"
OnCommand="ImageButton1_Command"
AlternateText="Microsoft Home"
ImageUrl="http://www.microsoft.com/homepage/gif/bnr-microsoft.gif" />
</form>
</body>
</HTML>
...package Samples.AspNet.JSL.Controls;
public class CustomImageButtonTagKey
extends System.Web.UI.WebControls.ImageButton
{
/** @property
*/
protected System.Web.UI.HtmlTextWriterTag get_TagKey()
{
// Specify that only the Input HTML tag can be passed to the
// HtmlTextWriter.
return System.Web.UI.HtmlTextWriterTag.Input;
} //get_TagKey
} //CustomImageButtonTagKey
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.
Note