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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>

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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