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LinkButton Class

Displays a hyperlink-style button control on a Web page.

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

public class LinkButton : WebControl, IButtonControl, IPostBackEventHandler
public class LinkButton extends WebControl implements IButtonControl, IPostBackEventHandler
public class LinkButton extends WebControl implements IButtonControl, IPostBackEventHandler

Use the LinkButton control to create a hyperlink-style button on the Web page. The LinkButton control has the same appearance as a HyperLink control, but has the same functionality as a Button control. If you want to link to another Web page when the control is clicked, consider using the HyperLink control.

NoteNote

The LinkButton control renders JavaScript to the client browser. The client browser must have JavaScript enabled for this control to function properly. For more information on client script, see Client Script in ASP.NET Web Pages.

You can create either a Submit button or a Command button. A Submit button does not have a command name associated with it. The button simply posts the Web page back to the server. By default, a LinkButton control is a Submit button. You can provide an event handler for the Click event to programmatically control the actions performed when the Submit button is clicked. On the other hand, a Command button has a command name associated with the button, such as Sort. Set the CommandName property to specify the command name. This allows you to create multiple LinkButton controls on a Web page and programmatically determine which LinkButton control is clicked. You can also use the CommandArgument property with a Command button to provide additional information about the command to perform, such as specifying ascending order. You can also provide an event handler for the Command event to programmatically control the action performed when the Command button is clicked.

Caution noteCaution

This control can be used to display user input, which might include malicious client script. Check any information that is sent from a client for executable script, SQL statements, or other code before displaying it in your application. ASP.NET provides an input request validation feature to block script and HTML in user input. Validation server controls are also provided to assess user input. For more information, see Validation Server Control Syntax.

By default, page validation is performed when a LinkButton control is clicked. Page validation determines whether the input controls associated with a validation control on the page all pass the validation rules specified by the validation control. To prevent page validation from occurring, set the CausesValidation property to false.

Accessibility

The markup rendered by default for this control might not conform to accessibility standards such as the Web Content Accessibility Guidelines 1.0 (WCAG) priority 1 guidelines. For details about accessibility support for this control, see ASP.NET Controls and Accessibility.

The following example demonstrates how to create a LinkButton control that displays text in a Label control when the link is clicked.

<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>

   <script language="C#" runat="server">
 
      void LinkButton_Click(Object sender, EventArgs e) 
      {
         Label1.Text="You clicked the link button";
      }
 
   </script>
 
</head>
<body>
 
   <form runat=server>

      <h3>LinkButton Example</h3>
 
      <asp:LinkButton id="LinkButton1" 
           Text="Click Me" 
           Font-Name="Verdana" 
           Font-Size="14pt" 
           OnClick="LinkButton_Click" 
           runat="server"/>
         
      <p>
 
      <asp:Label id=Label1 runat=server />
         
   </form>
 
</body>
</html>


System.Object
   System.Web.UI.Control
     System.Web.UI.WebControls.WebControl
      System.Web.UI.WebControls.LinkButton

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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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