HttpModule

创建继承自IHttpModule的类型，在web.config中加入配置，就可以对所有请求进行过滤了。

 

Public Class CustomXXXModule : Implements IHttpModule

        Public Sub Init(ByVal context As System.Web.HttpApplication) Implements System.Web.IHttpModule.Init

            ' 对特定的事件绑定事件处理函数，达到过滤目的
            AddHandler context.BeginRequest, AddressOf Application_BeginRequest

            .......................

            AddHandler context.EndRequest
            AddHandler context.AuthorizeRequest
            AddHandler context.AuthenticateRequest

            ............................
        End Sub

 

        Private Sub Application_BeginRequest(ByVal source As Object, ByVal e As EventArgs)

            ....................

        End Sub

 

        Public Sub Dispose() Implements System.Web.IHttpModule.Dispose

        End Sub

    End Class

 

web.config配置

<httpModules>
          <add name="XXXModule" type="namespace.XXXModule"/>
</httpModules>