Explain different types of directives in .NET [Resolved]

@Page: Defines page-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .aspx files <%@ Page AspCompat="TRUE" language="C#" %>

@Control:Defines control-specific attributes used by the ASP.NET page parser and compiler. Can be included only in .ascx files. <%@ Control Language="VB" EnableViewState="false" %>

@Import: Explicitly imports a namespace into a page or user control. The Import directive cannot have more than one namespace attribute. To import multiple namespaces, use multiple @Import directives. <% @ Import Namespace="System.web" %>

@Implements: Indicates that the current page or user control implements the specified .NET framework interface.<%@ Implements Interface="System.Web.UI.IPostBackEventHandler" %>

@Register: Associates aliases with namespaces and class names for concise notation in custom server control syntax.<%@ Register Tagprefix="Acme" Tagname="AdRotator" Src="AdRotator.ascx" %>

@Assembly: Links an assembly to the current page during compilation, making all the assembly's classes and interfaces available for use on the page. <%@ Assembly Name="MyAssembly" %><%@ Assembly Src="MySource.vb" %>

@OutputCache: Declaratively controls the output caching policies of an ASP.NET page or a user control contained in a page<%@ OutputCache Duration="#ofseconds" Location="Any | Client | Downstream | Server | None" Shared="True | False" VaryByControl="controlname" VaryByCustom="browser | customstring" VaryByHeader="headers" VaryByParam="parametername" %>

@Reference: Declaratively indicates that another user control or page source file should be dynamically compiled and linked against the page in which this directive is declared.

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Shweta_Pinky, if this helps please login to Mark As Answer. | Alert Moderator

Hi Shweta,
11 types of directives are there .
But most common directive is @page directive
1)@Page:Defines page-specific attributes used by the ASP.NET page parser and compiler and can be included only in .aspx files.

2)@Assembly:Links an assembly to the current page or user control declaratively

3)@Control: Defines control-specific attributes used by the ASP.NET page parser and compiler and can be included only in .ascx files (user controls).


4)@Outputcache:Controls the output caching policies of a page or user control declaratively.


5)@Reference: Links a page, user control, or COM control to the current page or user control declaratively.


6)@Implements: Indicates that a page or user control implements a specified .NET Framework interface declaratively.


7)@Import: Imports a namespace into a page or user control explicitly.


8)@Master: Identifies a page as a master page and defines attributes used by the ASP.NET page parser and compiler and can be included only in .master files.


9)@MasterType: Defines the class or virtual path used to type the Master property of a page.


10)@Previouspagetype: Creates a strongly typed reference to the source page from the target of a cross-page posting.

11)@Register: Associates aliases with namespaces and classes, which allow user controls and custom server controls to be rendered when included in a requested page or user control.

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Aswini Aluri

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