【问题标题】：ASP.NET MVC Base Controller Function not firing when I need it toASP.NET MVC 基本控制器功能在我需要时未触发
【发布时间】：2010-06-28 03:59:07
【问题描述】：

我注意到一些我不喜欢的行为，我想知道这是否正常。

我有一个继承自 Mvc.Controller 的 BaseController，我有一个内部的 View 函数，它会在每次页面加载时触发。

Protected Overrides Function View(ByVal viewName As String, ByVal masterName As String, ByVal model As Object) As System.Web.Mvc.ViewResult


    If Session("UserInfo") Is Nothing AndAlso User.Identity.IsAuthenticated Then
        Try
            ActivityMonitorService.AddActivity(UserService.GetUserByOpenID(HttpContext.User.Identity.Name).ID, _
                                               Utilities.ActivityMonitor.Log.SessionStarted, _
                                               Utilities.DataConverters.IPAddressToNumber(HttpContext.Request.UserHostAddress))
            ActivityMonitorService.SubmitChanges()
        Catch : End Try
        Session("UserInfo") = UserService.GetUserByOpenID(HttpContext.User.Identity.Name)
    End If

End Function

我遇到的问题是，如果会话状态关闭，我会在此函数上收到对象引用错误

Function Edit(ByVal id As Integer) As ActionResult
    If DirectCast(Session("UserInfo"), Domain.User).ID = id Then

        Dim user As Domain.User = UserService.GetUserByID(id)
        Return View(user)

    Else
        Response.StatusCode = CInt(HttpStatusCode.NotFound)
        Return RedirectToAction("NotFound", "Error")
    End If
End Function

现在我假设这是因为基本函数 View 实际上是在 Return View(user) 上触发的。如果这是真的，我将如何连接它以触发ActionResult 呼叫上的事件？

编辑：

如果我把代码放在这里，它似乎确实可以工作

Protected Overrides Function CreateActionInvoker() As System.Web.Mvc.IActionInvoker
    If Session("UserInfo") Is Nothing AndAlso User.Identity.IsAuthenticated Then
        Try
            ActivityMonitorService.AddActivity(UserService.GetUserByOpenID(HttpContext.User.Identity.Name).ID, _
                                               Utilities.ActivityMonitor.Log.SessionStarted, _
                                               Utilities.DataConverters.IPAddressToNumber(HttpContext.Request.UserHostAddress))
            ActivityMonitorService.SubmitChanges()
        Catch : End Try
        Session("UserInfo") = UserService.GetUserByOpenID(HttpContext.User.Identity.Name)
    End If
    Return MyBase.CreateActionInvoker()
End Function

这是放置会话状态“东西”的正确位置吗？

【问题讨论】：

标签： asp.net-mvc actionresult

【解决方案1】：

我将在我的编辑中使用解决方案将此标记为答案

Protected Overrides Function CreateActionInvoker() As System.Web.Mvc.IActionInvoker
    If Session("UserInfo") Is Nothing AndAlso User.Identity.IsAuthenticated Then
        Try
            ActivityMonitorService.AddActivity(UserService.GetUserByOpenID(HttpContext.User.Identity.Name).ID, _
                                               Utilities.ActivityMonitor.Log.SessionStarted, _
                                               Utilities.DataConverters.IPAddressToNumber(HttpContext.Request.UserHostAddress))
            ActivityMonitorService.SubmitChanges()
        Catch : End Try
        Session("UserInfo") = UserService.GetUserByOpenID(HttpContext.User.Identity.Name)
    End If
    Return MyBase.CreateActionInvoker()
End Function

【讨论】：