HttpContext.CurrentNotification Properti

Definisi

Ruang nama:

System.Web

Rakitan:

System.Web.dll

RequestNotification Mendapatkan nilai yang menunjukkan peristiwa saat ini HttpApplication yang sedang diproses.

public:
 property System::Web::RequestNotification CurrentNotification { System::Web::RequestNotification get(); };

public System.Web.RequestNotification CurrentNotification { get; }

member this.CurrentNotification : System.Web.RequestNotification

Public ReadOnly Property CurrentNotification As RequestNotification

Nilai Properti

RequestNotification

Salah RequestNotification satu nilai.

Pengecualian

PlatformNotSupportedException

Operasi ini memerlukan mode alur terintegrasi di IIS 7.0 dan setidaknya .NET Framework versi 3.0.

Contoh

Contoh berikut menunjukkan cara menggunakan CurrentNotification properti untuk menentukan peristiwa HttpApplication objek apa yang menangani permintaan saat ini yang sedang diproses. Dalam contoh, penanganan aktivitas menangani beberapa peristiwa HttpApplication objek, dan CurrentNotification properti menentukan kode apa yang dipanggil untuk setiap peristiwa yang ditangani.

using System;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;

// Module that demonstrates one event handler for several events.
namespace Samples
{
    public class ModuleExampleTestCS : IHttpModule
    {
        public ModuleExampleTestCS()
        {
            // Constructor
        }
        public void Init(HttpApplication app)
        {
            app.AuthenticateRequest += new EventHandler(App_Handler);
            app.PostAuthenticateRequest += new EventHandler(App_Handler);
            app.LogRequest += new EventHandler(App_Handler);
            app.PostLogRequest += new EventHandler(App_Handler);
        }
        public void Dispose()
        {
        }
        // One handler for AuthenticationRequest, PostAuthenticateRequest,
    // LogRequest, and PostLogRequest events
        public void App_Handler(object source, EventArgs e)
        {
            HttpApplication app = (HttpApplication)source;
            HttpContext context = app.Context;

            if (context.CurrentNotification == RequestNotification.AuthenticateRequest)
            {

                if (!context.IsPostNotification)
                {
                    // Put code here that is invoked when the AuthenticateRequest event is raised.
                }
                else
                {
                    // PostAuthenticateRequest 
                    // Put code here that runs after the AuthenticateRequest event completes.
                }
            }
            if (context.CurrentNotification == RequestNotification.LogRequest)
            {
                if (!context.IsPostNotification)
                {
                    // Put code here that is invoked when the LogRequest event is raised.
                }
                else
                {
                    // PostLogRequest
                    // Put code here that runs after the LogRequest event completes.
                }
            }
        }
    }
}

Imports System.Data
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI

' Module that demonstrates one event handler for several events.
Namespace Samples

    Public Class ModuleExampleTestVB
        Implements IHttpModule

        Public Sub New()
            ' Constructor
        End Sub

        Public Sub Init(ByVal app As HttpApplication) Implements IHttpModule.Init
            AddHandler app.AuthenticateRequest, AddressOf Me.App_Handler
            AddHandler app.PostAuthenticateRequest, AddressOf Me.App_Handler
            AddHandler app.LogRequest, AddressOf Me.App_Handler
            AddHandler app.PostLogRequest, AddressOf Me.App_Handler
        End Sub

        Public Sub Dispose() Implements IHttpModule.Dispose
        End Sub

        ' One handler for AuthenticationRequest, PostAuthenticateRequest,
    ' LogRequest, and PostLogRequest events
        Public Sub App_Handler(ByVal source As Object, ByVal e As EventArgs)
            Dim app As HttpApplication = CType(source, HttpApplication)
            Dim context As HttpContext = app.Context

            If (context.CurrentNotification = RequestNotification.AuthenticateRequest) Then

                If Not (context.IsPostNotification) Then

                    ' Put code here that is invoked when the AuthenticateRequest event is raised.
                Else

                    ' PostAuthenticateRequest 
                    ' Put code here that runs after the AuthenticateRequest event completes.

                End If
            End If

            If (context.CurrentNotification = RequestNotification.LogRequest) Then

                If Not (context.IsPostNotification) Then

                    ' Put code here that is invoked when the LogRequest event is raised.

                Else
                    ' PostLogRequest
                    ' Put code here that runs after the LogRequest event completes.

                End If
            End If
        End Sub
    End Class

End Namespace

Keterangan

Properti CurrentNotification memerlukan mode alur terintegrasi di IIS 7.0 dan setidaknya .NET Framework versi 3.0. Jika tersedia, properti mengembalikan RequestNotification nilai. Nilai CurrentNotification properti menunjukkan peristiwa mana dalam HttpApplication instans yang saat ini memproses permintaan.

Properti CurrentNotification tidak dimaksudkan untuk diatur. Sebaliknya, ditetapkan oleh IIS 7.0 selama pemrosesan permintaan di alur ASP.NET. CurrentNotification Mengatur properti akan mengakibatkan kesalahan kompilasi.

CurrentNotification diperkenalkan dalam .NET Framework versi 3.5. Untuk informasi selengkapnya, lihat Versi dan Dependensi.

Lihat juga

• IsPostNotification
• RequestNotification