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ConstructorNeedsTagAttribute Constructor (Boolean)

Initializes a new instance of the ConstructorNeedsTagAttribute class.

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

public ConstructorNeedsTagAttribute(
	bool needsTag
)

Parameters

needsTag
Type: System.Boolean

true to add a tag to a control; otherwise, false.

The following code example creates a simple custom control whose tag name is defined at run time. The following is the command line used to build the executable.

csc /t:library /out:myWebAppPath/Bin/cs_myConstructorNeedsTagAtt.dll constructorNeedsTagAtt.cs
/* File Name: constructorneedstagatt.cs. */ 

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;

namespace MyUserControl 
{
  // Attach the 'ConstructorNeedsTagAttribute' to 'Simple' class. 
  [ConstructorNeedsTagAttribute(true)]
  public class Simple : WebControl 
  {
    private String NameTag = "";

    public Simple(String tag)
    {
      this.NameTag = tag;
    } 

    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
    protected override void Render(HtmlTextWriter output) 
    {
      output.Write("<br>The TagName used for the 'Simple' control is "+"'"+NameTag+"'");
    }
  }  
}

The following code example uses the previous custom control. Notice that the values shown in the Register directive reflect the previous command line.

<%@ Register TagPrefix='MyCurrentUserControl' Namespace='MyUserControl' Assembly='cs_myConstructorNeedsTagAtt'%>
 <html>
  <body>
  <form method="POST" runat="server">
  <MyCurrentUserControl:Simple runat="server" />
  </form>
  </body>
 </html>

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

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