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Links of HttpApplication Class from docs.microsoft.com
 HttpApplication Class
 Remarks
 Constructors
 Properties
 Methods
 Events
 Explicit Interface Implementations
 Applies to
 See also

Links of HttpApplication Class from docs.microsoft.com

Source/Reference:
https://docs.microsoft.com/en-us/dotnet/api/system.web.httpapplication?view=netframework-4.8

HttpApplication Class

Defines the methods, properties, and events that are common to all application objects in an ASP.NET application. This class is the base class for applications that are defined by the user in the Global.asax file.

public class HttpApplication :
 IDisposable, System.ComponentModel.IComponent, System.Web.IHttpAsyncHandler

Inheritance Object --> HttpApplication

Implements: IComponent IDisposable IHttpAsyncHandler IHttpHandler

Remarks

Instances of the HttpApplication class are created in the ASP.NET infrastructure, not by the user directly. One instance of the HttpApplication class is used to process many requests in its lifetime. However, it can process only one request at a time. Thus, member variables can be used to store per-request data.

An application raises events that can be handled by custom modules that implement the IHttpModule interface or by event handler code that is defined in the Global.asax file. Custom modules that implement the IHttpModule interface can be put in the App_Code folder or in a DLL in the Bin folder.

HttpApplication is introduced in the .NET Framework version 3.5. For more information, see Versions and Dependencies.

Note: When running IIS 7.0 in Integrated mode, custom modules in the App_Code folder or Bin folder apply to all requests in the request pipeline. Event handler code in the Global.asax file only applies to requests that are mapped to an ASP.NET handler.

The application events are raised in the following order:

  1. BeginRequest
  2. AuthenticateRequest
  3. PostAuthenticateRequest
  4. AuthorizeRequest
  5. PostAuthorizeRequest
  6. ResolveRequestCache
  7. PostResolveRequestCache After the PostResolveRequestCache event and before the PostMapRequestHandler event, an event handler (which is a page that corresponds to the request URL) is created. When a server is running IIS 7.0 in Integrated mode and at least the .NET Framework version 3.0, the MapRequestHandler event is raised. When a server is running IIS 7.0 in Classic mode or an earlier version of IIS, this event cannot be handled.
  8. PostMapRequestHandler
  9. AcquireRequestState
  10. PostAcquireRequestState
  11. PreRequestHandlerExecute The event handler is executed.
  12. PostRequestHandlerExecute
  13. ReleaseRequestState
  14. PostReleaseRequestState After the PostReleaseRequestState event is raised, any existing response filters will filter the output.
  15. UpdateRequestCache
  16. PostUpdateRequestCache
  17. LogRequest. This event is supported in IIS 7.0 Integrated mode and at least the .NET Framework 3.0
  18. PostLogRequest This event is supported IIS 7.0 Integrated mode and at least the .NET Framework 3.0
  19. EndRequest

Constructors

Properties

Methods

Events

Explicit Interface Implementations

Applies to

.NET Framework: 4.8 4.7.2 4.7.1 4.7 4.6.2 4.6.1 4.6 4.5.2 4.5.1 4.5 4.0 3.5 3.0 2.0 1.1

See also

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References

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