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The parameters dictionary contains a null entry for parameter 'catId' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Case(Int32, Int32, Int32)' in 'TemplateSite.Controllers.HomeController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
參數名: parameters

說明: 執行當前 Web 請求期間,出現未經處理的異常。請檢查堆棧跟蹤信息,以了解有關該錯誤以及代碼中導緻錯誤的出處的詳細信息。

異常詳細信息: System.ArgumentException: The parameters dictionary contains a null entry for parameter 'catId' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Case(Int32, Int32, Int32)' in 'TemplateSite.Controllers.HomeController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
參數名: parameters

源錯誤:

執行當前 Web 請求期間生成了未經處理的異常。可以使用下面的異常堆棧跟蹤信息确定有關異常原因和發生位置的信息。

堆棧跟蹤:


[ArgumentException: The parameters dictionary contains a null entry for parameter 'catId' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Case(Int32, Int32, Int32)' in 'TemplateSite.Controllers.HomeController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
參數名: parameters]
   System.Web.Mvc.ActionDescriptor.ExtractParameterFromDictionary(ParameterInfo parameterInfo, IDictionary`2 parameters, MethodInfo methodInfo) +527
   System.Web.Mvc.<>c__DisplayClass1.<Execute>b__0(ParameterInfo parameterInfo) +19
   System.Linq.WhereSelectArrayIterator`2.MoveNext() +58
   System.Linq.Buffer`1..ctor(IEnumerable`1 source) +120
   System.Linq.Enumerable.ToArray(IEnumerable`1 source) +77
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +133
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.Async.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() +28
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() +58
   System.Web.Mvc.Async.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() +225
   System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +24
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +99
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +14
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +16
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +16
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +25
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +16
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9644037
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155


版本信息: Microsoft .NET Framework 版本:4.0.30319; ASP.NET 版本:4.6.1055.0