RequestNotification RequestNotification RequestNotification RequestNotification Enum

定义

指示处理 HttpApplication 请求期间发生事件和其他生命周期事件的时间。Indicates when events and other life-cycle events occur while a HttpApplication request is being processed.

此枚举有一个 FlagsAttribute 属性,允许按位组合成员值。

public enum class RequestNotification
[System.Flags]
public enum RequestNotification
type RequestNotification = 
Public Enum RequestNotification
继承
RequestNotificationRequestNotificationRequestNotificationRequestNotification
属性

字段

AcquireRequestState AcquireRequestState AcquireRequestState AcquireRequestState 32

指示为此请求引发了 AcquireRequestState 事件且正在处理该事件。Indicates that the AcquireRequestState event was raised for the request and is processing.

AuthenticateRequest AuthenticateRequest AuthenticateRequest AuthenticateRequest 2

指示为此请求引发了 AuthenticateRequest 事件且正在处理该事件。Indicates that the AuthenticateRequest event was raised for the request and is processing.

AuthorizeRequest AuthorizeRequest AuthorizeRequest AuthorizeRequest 4

指示为此请求引发了 AuthorizeRequest 事件且正在处理该事件。Indicates that the AuthorizeRequest event was raised for the request and is processing.

BeginRequest BeginRequest BeginRequest BeginRequest 1

指示为此请求引发了 BeginRequest 事件且正在处理该事件。Indicates that the BeginRequest event was raised for the request and is processing.

EndRequest EndRequest EndRequest EndRequest 2048

指示为此请求引发了 EndRequest 事件且正在处理该事件。Indicates that the EndRequest event was raised for the request and is processing.

ExecuteRequestHandler ExecuteRequestHandler ExecuteRequestHandler ExecuteRequestHandler 128

指示正在调用映射到已请求资源的处理程序来处理此请求。Indicates that the handler that is mapped to the requested resource is being invoked to process the request.

LogRequest LogRequest LogRequest LogRequest 1024

指示为此请求引发了 LogRequest 事件且正在处理该事件。Indicates that the LogRequest event was raised for the request and is processing.

MapRequestHandler MapRequestHandler MapRequestHandler MapRequestHandler 16

指示为此请求引发了 MapRequestHandler 事件且正在处理该事件。Indicates that the MapRequestHandler event was raised for the request and is processing.

PreExecuteRequestHandler PreExecuteRequestHandler PreExecuteRequestHandler PreExecuteRequestHandler 64

在映射处理该请求的处理程序之前,在应用程序生命周期中指定一个点。Indicates a point in the application life cycle just before the handler that processes the request is mapped.

ReleaseRequestState ReleaseRequestState ReleaseRequestState ReleaseRequestState 256

指示为此请求引发了 ReleaseRequestState 事件且正在处理该事件。Indicates that the ReleaseRequestState event was raised for the request and is processing.

ResolveRequestCache ResolveRequestCache ResolveRequestCache ResolveRequestCache 8

指示为此请求引发了 ResolveRequestCache 事件且正在处理该事件。Indicates that the ResolveRequestCache event was raised for the request and is processing.

SendResponse SendResponse SendResponse SendResponse 536870912

指示请求处理过程已完成且正在发送响应。Indicates that processing of the request is complete and that the response is being sent.

UpdateRequestCache UpdateRequestCache UpdateRequestCache UpdateRequestCache 512

指示为此请求引发了 UpdateRequestCache 事件且正在处理该事件。Indicates that the UpdateRequestCache event was raised for the request and is processing.

示例

下面的示例演示如何将RequestNotification枚举CurrentNotification与属性一起使用来确定当前HttpApplication实例正在处理请求的事件。The following example shows how to use the RequestNotification enumeration with the CurrentNotification property to determine which event of the current HttpApplication instance is processing the request.

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

注解

枚举与类HttpContext的属性一起使用, 以确定管道当前正在处理的事件。 CurrentNotification RequestNotificationThe RequestNotification enumeration is used with the CurrentNotification property of the HttpContext class to determine what event in the pipeline is currently processing. 若要确定HttpApplication实例的特定事件的所有处理程序何时完成处理, 请IsPostNotification使用属性。To determine when all the handlers for a specific event of the HttpApplication instance have finished processing, use the IsPostNotification property.

类型是在中引入的.NET Framework 3.5.NET Framework 3.5 RequestNotificationThe RequestNotification type is introduced in the .NET Framework 3.5.NET Framework 3.5. 有关详细信息,请参见版本和依赖关系For more information, see Versions and Dependencies.

适用于

另请参阅