TagPrefixAttribute Constructor (String, String)

 

Initializes a new instance of the TagPrefixAttribute class.

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

public TagPrefixAttribute(
	string namespaceName,
	string tagPrefix
)

Parameters

namespaceName
Type: System.String

A string that identifies the custom control namespace.

tagPrefix
Type: System.String

A string that identifies the custom control prefix.

Exception Condition
ArgumentException

The namespaceName or the tagPrefix is null or an empty string ("").

In defining your custom control, and prior to any code, you should invoke this class constructor as follows:

[assembly:TagPrefix(namespace, tag)]

The following code example shows how to define an assembly-level attribute that enables you to specify a tag prefix alias for a custom control. This attribute is used by tools such as Microsoft Visual Studio to automatically generate a @ Register directive in Web pages where the custom controls are used.


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

[assembly:TagPrefix("CustomControls", "custom")]


namespace CustomControls
{

	// Simple custom control
	public class MyCS_Control : Control
      {
            private String message = "Hello";

            public virtual String Message
            {
                  get
                  {
                        return message;
                  }
                  set
                  {
                        message = value;
                  }
            }

            [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")] 
            protected override void Render( HtmlTextWriter writer)
            {
            writer.Write("<span style='background-color:aqua; font:8pt tahoma, verdana;'> "
                        + this.Message + "<br>" + "C# version. The time on the server is " + System.DateTime.Now.ToLongTimeString()
                        + "</span>");

            }

      }

}

.NET Framework
Available since 1.1
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