Interviews - C# Corner

siva
How many events are available in Global.asax?
By siva in ASP.NET onJul 29 2006
  • Jul, 2006 31

    In detail: The Global.asax file, which is derived from the HttpApplication class, maintains a pool of HttpApplication objects, and assigns them to applications as needed. The Global.asax file contains the following events:

    • Application_Init: Fired when an application initializes or is first called. It's invoked for all HttpApplication object instances.
    • Application_Disposed: Fired just before an application is destroyed. This is the ideal location for cleaning up previously used resources.
    • Application_Error: Fired when an unhandled exception is encountered within the application.
    • Application_Start: Fired when the first instance of the HttpApplication class is created. It allows you to create objects that are accessible by all HttpApplication instances.
    • Application_End: Fired when the last instance of an HttpApplication class is destroyed. It's fired only once during an application's lifetime.
    • Application_BeginRequest: Fired when an application request is received. It's the first event fired for a request, which is often a page request (URL) that a user enters.
    • Application_EndRequest: The last event fired for an application request.
    • Application_PreRequestHandlerExecute: Fired before the ASP.NET page framework begins executing an event handler like a page or Web service.
    • Application_PostRequestHandlerExecute: Fired when the ASP.NET page framework is finished executing an event handler.
    • Applcation_PreSendRequestHeaders: Fired before the ASP.NET page framework sends HTTP headers to a requesting client (browser).
    • Application_PreSendContent: Fired before the ASP.NET page framework sends content to a requesting client (browser).
    • Application_AcquireRequestState: Fired when the ASP.NET page framework gets the current state (Session state) related to the current request.
    • Application_ReleaseRequestState: Fired when the ASP.NET page framework completes execution of all event handlers. This results in all state modules to save their current state data.
    • Application_ResolveRequestCache: Fired when the ASP.NET page framework completes an authorization request. It allows caching modules to serve the request from the cache, thus bypassing handler execution.
    • Application_UpdateRequestCache: Fired when the ASP.NET page framework completes handler execution to allow caching modules to store responses to be used to handle subsequent requests.
    • Application_AuthenticateRequest: Fired when the security module has established the current user's identity as valid. At this point, the user's credentials have been validated.
    • Application_AuthorizeRequest: Fired when the security module has verified that a user can access resources.
    • Session_Start: Fired when a new user visits the application Web site.
    • Session_End: Fired when a user's session times out, ends, or they leave the application Web site.

      Thanks!
      Manoj [InfoAxon Technologies Ltd.]

    • 0
  • Jul, 2006 31

    protected void Application_BeginRequest(Object sender, EventArgs e)
    {
        Response.Write("

    Welcome to Interview Corner Website!

    " );
        Response.Write(" This is my header that comes from Application level " );
        Response.Write("
    ");
    }
    //inside Begin_Request there can be following events as well.

    • AcquireRequestState
    • AuthenticateRequest
    • AuthorizeRequest
    • BeginRequest
    • EndRequest
    • Error
    • PostRequestHandlerExecute
    • PreRequestHandlerExecute
    • PreSendRequestContent
    • PreSendRequestHeaders
    • ReleaseRequestState
    • ResolveRequestCache
    • UpdateRequestCache

      //finally your end request goes here....

      protected void Application_EndRequest(Object sender, EventArgs e)
      {
          int yearDate ;
          string dateStr;
          yearDate = System.DateTime.Now.Year;
          dateStr = yearDate.ToString();
          Response.Write("
      ");
          Response.Write("Copyright 2002-" + dateStr );
          Response.Write("This is my footer that  from Application level" );
          Response.Write("
      ");
      }

      Thanks!
      Manoj [InfoAxon Technologies Ltd.]

    • 0

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