| HttpApplication | disposable |
| System.Web (system.web.dll) | class |
HttpApplication is the default base class from which your web application derives. This class is most notable for the application-level events it provides. You can code event handlers that react to global application events in the global.asax file. If you use Visual Studio .NET to create a code-behind class (like global.asax.vb), the event handler code will be created in a class called Global, which inherits from HttpApplication. The first time a user navigates to a page in your application, the ASP.NET engine creates a pool of HttpApplication objects. Whenever your application receives a request, the ASP.NET engine automatically assigns one of these HttpApplication instances to serve the request. This HttpApplication instance will be reused, but only once the request is complete. public class HttpApplication : IHttpAsyncHandler, IHttpHandler, System.ComponentModel.IComponent, IDisposable { // Public Constructors public HttpApplication( ); // Public Instance Properties public HttpApplicationState Application{get; } public HttpContext Context{get; } public HttpModuleCollection Modules{get; } public HttpRequest Request{get; } public HttpResponse Response{get; } public HttpServerUtility Server{get; } public HttpSessionState Session{get; } public ISite Site{set; get; } // implements System.ComponentModel.IComponent public IPrincipal User{get; } // Protected Instance Properties protected EventHandlerList Events{get; } // Public Instance Methods public void AddOnAcquireRequestStateAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnAuthenticateRequestAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnAuthorizeRequestAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnBeginRequestAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnEndRequestAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnPostRequestHandlerExecuteAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnPreRequestHandlerExecuteAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnReleaseRequestStateAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnResolveRequestCacheAsync(BeginEventHandler bh, EndEventHandler eh); public void AddOnUpdateRequestCacheAsync(BeginEventHandler bh, EndEventHandler eh); public void CompleteRequest( ); public virtual void Dispose( ); // implements IDisposable public virtual string GetVaryByCustomString(HttpContext context, string custom); public virtual void Init( ); // Events public event EventHandler AcquireRequestState; public event EventHandler AuthenticateRequest; public event EventHandler AuthorizeRequest; public event EventHandler BeginRequest; public event EventHandler Disposed; // implements System.ComponentModel.IComponent public event EventHandler EndRequest; public event EventHandler Error; public event EventHandler PostRequestHandlerExecute; public event EventHandler PreRequestHandlerExecute; public event EventHandler PreSendRequestContent; public event EventHandler PreSendRequestHeaders; public event EventHandler ReleaseRequestState; public event EventHandler ResolveRequestCache; public event EventHandler UpdateRequestCache; } Returned By HttpContext.ApplicationInstance Passed To HttpContext.ApplicationInstance, IHttpModule.Init( ), System.Web.Security.DefaultAuthenticationModule.Init( ), System.Web.Security.FileAuthorizationModule.Init( ), System.Web.Security.FormsAuthenticationModule.Init( ), System.Web.Security.PassportAuthenticationModule.Init( ), System.Web.Security.UrlAuthorizationModule.Init( ), System.Web.Security.WindowsAuthenticationModule.Init( ), System.Web.SessionState.SessionStateModule.Init( ) |
