Asp.net 为什么RedirectToRoutePermanent添加了；计数=0“；询问？

我正在使用ASP.NET 4.0路由，正在从数据库中读取路由信息并添加路由，如下所示。简而言之，我的自定义对象“RouteLookup”包含路由信息，包括它可能重定向到或不重定向到的另一个RouteLookup的ID。下面是数据库中两个RouteLookup条目的示例：

    RouteLookupID   RouteName       RelativePath    RequestHandler  RouteHandler    IsSecure    RedirectedToRoute
    13              PrivacyRoute    about/privacy   privacy.aspx    NULL               0             0
    14              PrivacyRoute1   privacy         privacy.aspx    NULL               0             13       

RouteLookupID 14是需要永久重定向到RouteLookupID 13的传统路由。我遇到的问题是，当我从浏览器请求“”并查看Fiddler结果时，它实际上会重定向两次，并添加一个“count=0”作为查询字符串参数！我不知道这个参数是从哪里来的，因为我没有明确添加这个参数的进程、httphandler等

这里到底发生了什么事？非常感谢您的任何想法，下面是相关代码的其余部分

我有一个类BaseRoute，它继承自Route，因此我可以将我的自定义RouteLookup对象连同它一起传递给自定义RouteHandler，以便在我命名为BaseRouteHandler的自定义RouteHandler中进行检查

Public Class PageRouter

Private Shared db As New QADBDataContext

''''''' Is called from Global Application_Start
Public Shared Sub MapRoutes(routeColl As RouteCollection)

    Dim routeLookups As IEnumerable(Of RouteLookup) = From rt In db.RouteLookups Select rt

    For Each rtLookUp As RouteLookup In routeLookups
        Dim parameterizedURL As String = BuildParameterizedVirtualPath(rtLookUp)

            ' Determine handler and route values
            If rtLookUp.RouteHandler Is Nothing Then
                RouteTable.Routes.Add(rtLookUp.RouteName, New BaseRoute(parameterizedURL, New BaseRouteHandler(), rtLookUp))
            Else
                RouteTable.Routes.Add(rtLookUp.RouteName, New BaseRoute(parameterizedURL, Activator.CreateInstance(Type.GetType("QA." + rtLookUp.RouteHandler)), rtLookUp))
            End If            
    Next
End Sub

Protected Shared Function BuildParameterizedVirtualPath(rtLookUp As RouteLookup) As String

    Dim parameterizedURL As String = rtLookUp.RelativePath
    For Each param As RouteParameter In rtLookUp.RouteParameters
        parameterizedURL &= "/{" + param.Name + "}"
    Next
    Return parameterizedURL

End Function

Public Shared Sub RedirectToRoutePermanent(rtData As RouteData)

    Dim route As BaseRoute = DirectCast(rtData.Route, BaseRoute)
    Dim rtLookup As RouteLookup = route.RouteLookup
    Dim newRtLookupID As Integer = rtLookup.RedirectedToRoute
    Dim newRtLookup As RouteLookup = (From rt In db.RouteLookups Where rt.RouteLookupID = newRtLookupID).SingleOrDefault
    HttpContext.Current.Response.RedirectToRoutePermanent(newRtLookup.RouteName, rtData.Values.Values)

End Sub
End Class

自定义路线类别：

Public Class BaseRoute
Inherits Route

Private _routeLookup As RouteLookup = Nothing

Public Sub New(url As String, routeHandler As IRouteHandler, routeLookup As RouteLookup)
    MyBase.New(url, routeHandler)
    _routeLookup = routeLookup

End Sub

Public ReadOnly Property RouteLookup As RouteLookup
    Get
        Return _routeLookup
    End Get
End Property
End Class

自定义路由管理器：

Public Class BaseRouteHandler
Implements IRouteHandler

Protected _baseRoute As BaseRoute = Nothing
Protected _rtLookup As RouteLookup = Nothing

Protected Overridable Sub InitializeContext(ByVal requestContext As System.Web.Routing.RequestContext)

    _baseRoute = DirectCast(requestContext.RouteData.Route, BaseRoute)
    _rtLookup = _baseRoute.RouteLookup

End Sub


Public Function GetHttpHandler(ByVal requestContext As System.Web.Routing.RequestContext) _
                        As System.Web.IHttpHandler Implements System.Web.Routing.IRouteHandler.GetHttpHandler

    InitializeContext(requestContext)
    EnforceURLStandard(requestContext)
    PerformRedirectIfNeeded(requestContext)
    Return GetPageHandler(requestContext)

End Function


Protected Overridable Sub PerformRedirectIfNeeded(ByVal requestContext As System.Web.Routing.RequestContext)

    If _rtLookup.RedirectedToRoute > 0 Then
        PageRouter.RedirectToRoutePermanent(requestContext.RouteData)
    End If

End Sub


Protected Sub EnforceURLStandard(ByVal requestContext As System.Web.Routing.RequestContext)

    ' Test for:
    '   * Proper protocol
    '   * www. exists
    '   * must be all lowercase

    Dim scheme As String = HttpContext.Current.Request.Url.GetComponents(UriComponents.Scheme, UriFormat.UriEscaped)
    Dim rightSide As String = HttpContext.Current.Request.Url.GetComponents(UriComponents.HostAndPort Or UriComponents.PathAndQuery, UriFormat.UriEscaped)
    Dim newURL As String = Nothing

    If Not rightSide.ToLower().StartsWith("www.") AndAlso Not rightSide.ToLower().StartsWith("localhost") _
        AndAlso Not rightSide.ToLower().StartsWith("uat") AndAlso Not rightSide.ToLower().StartsWith("ux") Then
        newURL = scheme & "://www." & rightSide
    End If

    If _rtLookup.IsSecure <> requestContext.HttpContext.Request.IsSecureConnection Then
        Dim newScheme As String = If(_rtLookup.IsSecure, "https", "http")
        newURL = newScheme & rightSide
    End If

    Dim pattern As String = "[A-Z]"
    If Not String.IsNullOrWhiteSpace(newURL) Then
        If Regex.IsMatch(newURL, pattern) Then
            newURL = newURL.ToLower()
        End If
    Else
        If Regex.IsMatch(HttpContext.Current.Request.Url.ToString(), pattern) Then
            newURL = HttpContext.Current.Request.Url.ToString().ToLower()
        End If
    End If

    If Not newURL Is Nothing Then
        HttpContext.Current.Response.RedirectPermanent(newURL, True)
    End If

End Sub

Protected Overridable Function GetPageHandler(ByVal requestContext As System.Web.Routing.RequestContext) As System.Web.IHttpHandler

    Return TryCast(BuildManager.CreateInstanceFromVirtualPath("/" & _rtLookup.RequestHandler, GetType(Page)), Page)

End Function

End Class

公共类BaseRouteHandler
实现IRouteHandler
受保护的_baseRoute作为baseRoute=无
受保护的_rtLookup作为RouteLookup=Nothing
受保护的可重写子InitializeContext（ByVal requestContext作为System.Web.Routing.requestContext）
_baseRoute=DirectCast（requestContext.RouteData.Route，baseRoute）
_rtLookup=\u baseRoute.RouteLookup
端接头
公共函数GetHttpHandler（ByVal requestContext作为System.Web.Routing.requestContext）_
正如System.Web.IHttpHandler实现System.Web.Routing.IRoutHandler.GetHttpHandler一样
InitializeContext（请求上下文）
EnforceURLStandard（requestContext）
PerformReciptionRequired（请求上下文）
返回GetPageHandler（requestContext）
端函数
受保护的可重写子性能需要（ByVal requestContext作为System.Web.Routing.requestContext）
如果_rtLookup.RedirectedToRoute>0，则
PageRouter.RedirectToRoutePermanent（requestContext.RouteData）
如果结束
端接头
受保护的子EnforceURLStandard（ByVal requestContext作为System.Web.Routing.requestContext）
“测试：
“*适当的协议
“*www.exists
“*必须全部小写
Dim scheme As String=HttpContext.Current.Request.Url.GetComponents（UriComponents.scheme，UriFormat.UriEscaped）
右侧标注为String=HttpContext.Current.Request.Url.GetComponents（UriComponents.HostAndPort或UriComponents.PathAndQuery，UriFormat.UriEscaped）
Dim newURL作为字符串=无
如果不是righside.ToLower（）.StartsWith（“www.”），也不是righside.ToLower（）.StartsWith（“localhost”）_
也不是右侧。ToLower（）.StartsWith（“uat”）也不是右侧。ToLower（）.StartsWith（“ux”）然后
newURL=scheme&“：//www.”右侧（&R）
如果结束
如果_rtLookup.IsSecure requestContext.HttpContext.Request.IsSecureConnection，则
Dim newScheme As String=If（_rtLookup.IsSecure，“https”，“http”）
newURL=新闻模式和右侧
如果结束
将图案变暗为字符串=“[A-Z]”
如果不是String.IsNullOrWhiteSpace（newURL），则
如果Regex.IsMatch（newURL，pattern）那么
newURL=newURL.ToLower（）
如果结束
其他的
如果Regex.IsMatch（HttpContext.Current.Request.Url.ToString（），pattern）则
newURL=HttpContext.Current.Request.Url.ToString（）.ToLower（）
如果结束
如果结束
如果不是，那么newURL什么都不是
HttpContext.Current.Response.RedirectPermanent（newURL，True）
如果结束
端接头
受保护的可重写函数GetPageHandler（ByVal requestContext作为System.Web.Routing.requestContext）作为System.Web.IHttpHandler
返回TryCast（BuildManager.CreateInstanceFromVirtualPath（“/”&_rtLookup.RequestHandler，GetType（Page）），Page）
端函数
末级

好吧，弄清楚这里发生了什么。RedirectToRoutePermanent不像RedirectPermanent（url，true）那样终止请求。我重新编写了PageRouter.RedirectToRoutePermanent，解决了以下问题：

 Public Shared Sub RedirectToRoutePermanent(rtData As RouteData)

    Dim route As BaseRoute = DirectCast(rtData.Route, BaseRoute)
    Dim rtLookup As RouteLookup = route.RouteLookup
    Dim newRtLookupID As Integer = rtLookup.RedirectedToRoute
    Dim newRtLookup As RouteLookup = (From rt In db.RouteLookups Where rt.RouteLookupID = newRtLookupID).SingleOrDefault

    Dim hostAndPort As String = HttpContext.Current.Request.Url.GetComponents(UriComponents.HostAndPort, UriFormat.UriEscaped)
    Dim newURL As String = Nothing

    Dim scheme As String = If(rtLookup.IsSecure, "https", "http")
    newURL = scheme & "://" & hostAndPort
    newURL &= "/" & newRtLookup.RelativePath

    If rtData.Values.Count > 1 Then
        For i As Integer = 1 To rtData.Values.Count - 1
            newURL &= "/" & rtData.Values(i)
        Next
    End If

    HttpContext.Current.Response.RedirectPermanent(newURL, True)

End Sub