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ASP.NET Directives
  ASP.NET @ Webpage Directives
  ASP.NET @ Application Directives
  ASP.NET Inline Directives
  Source/Reference

ASP.NET Directives

Similar to ASP, ASP.NET use directive as extra features for setting the process configuration of the ASP.NET engine execution. But unlike ASP, ASP.NET @ webpage directives are used by the page and user-control compilers when the compilers process ASP.NET web forms page files with file extension .aspx and user control files with file extension .ascx. ASP.NET application @ directives are used by ASP.NET parser when processing ASP.NET global application files with file extension .asax. Besides there are also some general ASP.NET inline directives which are used in ASP.NET scripting.

ASP.NET @ Webpage Directives

The supported ASP.NET @ directives for web form and user control are

  • @ Assembly: Links an assembly to the current page or user control declaratively.
  • @ Control: Defines control-specific attributes used by the ASP.NET page parser and compiler and can be included only in .ascx files (user controls).
  • @ Implements: Indicates that a page or user control implements a specified .NET Framework interface declaratively.
  • @ Import: Imports a namespace into a page or user control explicitly.
  • @ 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.
  • @ MasterType: Defines the class or virtual path used to type the Master property of a page.
  • @ OutputCache: Controls the output caching policies of a page or user control declaratively.
  • @ Page: Defines page-specific attributes used by the ASP.NET page parser and compiler and can be included only in .aspx files.
  • @ PreviousPageType: Creates a strongly typed reference to the source page from the target of a cross-page posting.
  • @ Reference: Links a page, user control, or COM control to the current page or user control declaratively.
  • @ 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.

ASP.NET @ Application Directives

Application directives specify optional application-specific settings used by the ASP.NET parser when processing ASP.NET global application (.asax) files. Application directives are located at the top of the Global.asax file.

  • @ Application: Defines application-specific attributes used by the ASP.NET application compiler.
  • @ Import: Explicitly imports a namespace into an application.
  • @ Assembly: Links an assembly to the application at parse time.

ASP.NET Inline Directives

The supported ASP.NET inline directives for ASP.NET scripting are

  • <% ⋯ %>: embedded code blocks
  • <%= ⋯ %>: displaying expression
  • <%@ ⋯ %>: directive expression
  • <%# ⋯ %>: data-binding expression
  • <%$ ⋯ %>: expression builder
  • <%-- ⋯ %>: server-side comments block
  • <%: ⋯ %>: hTML encoded data-binding expressions

Source/Reference

  • https://docs.microsoft.com/en-us/previous-versions/t8syafc7(v=vs.140)
  • https://docs.microsoft.com/en-us/previous-versions/dotnet/netframework-4.0/s42bzt8x(v=vs.100)
  • https://support.microsoft.com/en-us/help/976112/introduction-to-asp-net-inline-expressions-in-the-net-framework
  • https://weblogs.asp.net/scottgu/new-lt-gt-syntax-for-html-encoding-output-in-asp-net-4-and-asp-net-mvc-2
  • https://docs.microsoft.com/en-us/aspnet/whitepapers/whats-new-in-aspnet-45-and-visual-studio-2012#_Toc318097391

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References

  1. Active Server Pages, http://msdn.microsoft.com/en-us/library/aa286483.aspx, updated 20Dec2012
  2. ASP Overview, http://msdn.microsoft.com/en-us/library/ms524929%28v=vs.90%29.aspx, updated 21Dec2012
  3. ASP Best Practices, http://technet.microsoft.com/en-us/library/cc939157.aspx, updated 15Apr2013
  4. ASP Built-in Objects, http://msdn.microsoft.com/en-us/library/ie/ms524716(v=vs.90).aspx, updated 20Dec2012
  5. Response Object, http://msdn.microsoft.com/en-us/library/ms525405(v=vs.90).aspx, updated 20Dec2012
  6. Request Object, http://msdn.microsoft.com/en-us/library/ms524948(v=vs.90).aspx, updated 20Dec2012
  7. Server Object (IIS), http://msdn.microsoft.com/en-us/library/ms525541(v=vs.90).aspx, updated 20Dec2012
  8. Application Object (IIS), http://msdn.microsoft.com/en-us/library/ms525360(v=vs.90).aspx, updated 20Dec2012
  9. Session Object (IIS), http://msdn.microsoft.com/en-us/library/ms524319(8v=vs.90).aspx, updated 20Dec2012
  10. ASPError Object, http://msdn.microsoft.com/en-us/library/ms524942(v=vs.90).aspx, updated 20Dec2012
  11. ObjectContext Object (IIS), http://msdn.microsoft.com/en-us/library/ms525667(v=vs.90).aspx, updated 20Dec2012
  12. Debugging Global.asa Files, http://msdn.microsoft.com/en-us/library/aa291249(v=vs.71).aspx, updated 15Apr2013
  13. How to: Debug Global.asa files, http://msdn.microsoft.com/en-us/library/ms241868(v=vs.80).aspx, updated 15Apr2013
  14. Calling COM Components from ASP Pages, http://msdn.microsoft.com/en-us/library/ms524620(v=VS.90).aspx, updated 15Apr2013
  15. IIS ASP Scripting Reference, http://msdn.microsoft.com/en-us/library/ms524664(v=vs.90).aspx, updated 15Apr2013
  16. ASP Keywords, http://msdn.microsoft.com/en-us/library/ms524672(v=vs.90).aspx, updated 15Apr2013
  17. Creating Simple ASP Pages, http://msdn.microsoft.com/en-us/library/ms524741(v=vs.90).aspx, updated 15Apr2013
  18. Including Files in ASP Applications, http://msdn.microsoft.com/en-us/library/ms524876(v=vs.90).aspx, updated 15Apr2013
  19. ASP Overview, http://msdn.microsoft.com/en-us/library/ms524929(v=vs.90).aspx, updated 15Apr2013
  20. FileSystemObject Object, http://msdn.microsoft.com/en-us/library/z9ty6h50(v=vs.84).aspx, updated 14Mayr2013
  21. http://msdn.microsoft.com/en-us/library/windows/desktop/ms675944(v=vs.85).aspx, ADO Object Model, updated 15Apr2013
  22. ADO Fundamentals, http://msdn.microsoft.com/en-us/library/windows/desktop/ms680928(v=vs.85).aspx, updated 14Mayr2013
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ID: 190600026 Last Updated: 2019/6/26 Revision: Ref:

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