C# 需要CollectionType。参数名称：collectionType

我在应用程序中使用ASP.NETMVC和实体框架。我明白了 需要CollectionType。参数名称：发布项目并放入生产服务器时发生collectionType错误。但是我自己的电脑上没有。这是我的密码

var model = DB.RFH_ComplexRequest.Where(
            d => (d.FKRequestPeriodID == requestPeriodID || requestPeriodID == null)
                 && (d.RFH_Personel.PersonelCode == personelCode || personelCode == "")
                 && (String.Compare(d.StartDate, fromDate) >= 0 || fromDate == "")
                 && (String.Compare(d.EndDate, toDate) <= 0 || toDate == "")
                 && (d.RequestCode == requestCode || requestCode == null)
                 && (d.FKComplexRequestStatusID == requestStatus || requestStatus == null)
                 && (d.FKComplexID == complex || complex == null)
                 && (d.FKComplexRequestRegistrationTypeID == registrationType || registrationType == null)
                 && (d.FKComplexRequestTypeID == requestType || requestType == null))                     
                .Select(d => new AllRequestsViewModel
                    {
                        PKComplexRequestID = d.PKComplexRequestID,                            
                        RequestCode = d.RequestCode,
                        UsageHistory = 0,
                        EmploymentHistory = 0,                            
                        StatusName = d.RFH_ComplexRequestStatus.ComplexRequestStatusName,                                                                                   
                        FKPersonelID = d.FKPersonelID,
                        Status = d.FKComplexRequestStatusID,
                        PersonelCode = d.RFH_Personel.PersonelCode,
                        PersonelName = d.RFH_Personel.PersonelName,
                        PersonelFamily = d.RFH_Personel.PersonelFamily,                            
                        RequestDayCount = d.RequestDayCount,
                        ComplexName = d.RFH_Complex != null ? d.RFH_Complex.ComplexName : "",
                        DepartmentName = d.RFH_Personel.RFH_Department.DepartmentName,
                        RegisterDate = d.RegisterDate,
                        StartDate = d.StartDate,
                        EndDate = d.EndDate,
                        ComplexRequestTypeName = d.RFH_ComplexRequestType.ComplexRequestTypeName,
                        RequestPeriodName = d.RFH_RequestPeriod != null ? d.RFH_RequestPeriod.RequestPeriodName : ""
                    }).
            ToList();
        foreach (var complexRequest in model)
        {
            // Get last use and calculate usage history
            var requestTypeList =
                DB.RFH_ComplexRequestType.Where(d => d.AffectsUsagePriority)
                    .Select(d => d.PKComplexRequestTypeID)
                    .ToList();
            var statusList = new List<byte>
            {
                //Convert.ToByte(ComplexRequestStatus.UserConfirmed),
                //Convert.ToByte(ComplexRequestStatus.RoomAllocated),
                //Convert.ToByte(ComplexRequestStatus.SecondSignatureConfirmed),
                //Convert.ToByte(ComplexRequestStatus.Confirmed),
                Convert.ToByte(ComplexRequestStatus.Used)
            };
            var lastUsage = DB.RFH_ComplexRequest.Where(
                      r => r.PKComplexRequestID != complexRequest.PKComplexRequestID &&
                        r.FKPersonelID == complexRequest.FKPersonelID &&
                        r.FKRequestPeriodID != requestPeriodID &&
                        statusList.Contains(r.FKComplexRequestStatusID) &&
                        (requestTypeList.Any() && requestTypeList.Contains(r.FKComplexRequestTypeID)) &&
                        (r.RFH_Complex != null && r.RFH_Complex.AffectsUsagePriority &&
                        r.RFH_Complex.UsagePriorityAffectDays != null &&
                        r.RequestDayCount >= r.RFH_Complex.UsagePriorityAffectDays))
                .OrderByDescending(r => r.StartDate).FirstOrDefault();
            if (lastUsage != null)
            {
                complexRequest.UsageHistory = CGeneralDef.ShamsiYearDiff(lastUsage.StartDate,
                    CGeneralDef.GetCurrentShamsiDate());
                complexRequest.LastUsageDate = lastUsage.StartDate;
            }
            else
            {
                complexRequest.UsageHistory = 100;                    
                complexRequest.LastUsageDate = "0000/00/00";
            }
            var personel = DB.RFH_Personel.Single(r => r.PKPersonelID == complexRequest.FKPersonelID);
            if (personel != null && !String.IsNullOrEmpty(personel.EmploymentDate))
                complexRequest.EmploymentHistory = CGeneralDef.ShamsiYearDiff(personel.EmploymentDate, CGeneralDef.GetCurrentShamsiDate());
            else
                complexRequest.EmploymentHistory = 0;                

        }

这是我的堆栈跟踪：

[ArgumentException:需要CollectionType。 参数名称：collectionType] System.Data.Common.CommandTrees.ExpressionBuilder.Internal.ArgumentValidation.ValidateEndEmptyCollectionTypeUsage collectionType、DbExpressionList和validElements+11017011 System.Data.Objects.ELinq.NewArrayInitTranslator.TypedTranslateExpressionConverter父级，NewArrayExpression linq+285 System.Data.Objects.ELinq.ExpressionConverter.TranslateExpressionExpressionExpression linq+369 System.Data.Objects.ELinq.ConstantTranslator.TypedTranslateExpressionConverter父级，ConstantPression linq+603 System.Data.Objects.ELinq.ExpressionConverter.TranslateExpressionExpressionExpression linq+369 System.Data.Objects.ELinq.UnarySequenceMethodTranslator.TranslateExpressionTransfer父级，MethodCallExpression调用+83 System.Data.Objects.ElIQ.MethodCallTranslator.TypedTranslateExpressionConverter父级，MethodCallExpression linq+222 System.Data.Objects.ELinq.BinaryTranslator.TypedTranslateExpressionConverter父级，BinaryExpression linq+180 System.Data.Objects.ELinq.BinaryTranslator.TypedTranslateExpressionConverter父级，BinaryExpression linq+327 System.Data.Objects.ELinq.BinaryTranslator.TypedTranslateExpressionConverter父级，BinaryExpression linq+180 System.Data.Objects.ELinq.ExpressionConverter.TranslateLambdaLambdaExpression lambda，DbExpression输入+244 System.Data.Objects.Elink.OneLambdaTranslator.TranslateExpressionConverter父级、MethodCallExpression调用、DbExpression和source、DbExpressionBinding和sourceBinding、DbExpression和lambda+322 System.Data.Objects.ELinq.OneLambdaTranslator.TranslateExpressionConverter父级，MethodCallExpression调用+61 System.Data.Objects.ElIQ.MethodCallTranslator.TypedTranslateExpressionConverter父级，MethodCallExpression linq+222 System.Data.Objects.ELinq.ExpressionConverter.TranslateExpressionExpressionExpression linq+369 System.Data.Objects.ELinq.OneLambdaTranslator.TranslateExpressionConverter父级、MethodCallExpression调用、DbExpression和source、DbExpressionBinding和sourceBinding、DbExpression和lambda+79 System.Data.Objects.ELinq.OneLambdaTranslator.TranslateExpressionConverter父级，MethodCallExpression调用+61 System.Data.Objects.ElIQ.MethodCallTranslator.TypedTranslateExpressionConverter父级，MethodCallExpression linq+222 System.Data.Objects.ELinq.ExpressionConverter.TranslateExpressionExpressionExpression linq+369 System.Data.Objects.ELinq.UnarySequenceMethodTranslator.TranslateExpressionTransfer父级，MethodCallExpression调用+83 System.Data.Objects.ElIQ.MethodCallTranslator.TypedTranslateExpressionConverter父级，MethodCallExpression linq+222 System.Data.Objects.ELinq.ExpressionConverter.TranslateExpressionExpressionExpression linq+369 System.Data.Objects.Elink.ElinkQueryState.GetExecutionPlanNullable1 forMergeOption+296 System.Data.Objects.ObjectQuery1.GetResultsNullable1 forMergeOption+10985849 System.Data.Objects.ObjectQuery1.System.Collections.Generic.IEnumerable.GetEnumerator+47 System.Linq.Enumerable.FirstOrDefaultIEnumerable1源+220 System.Linq.Queryable.FirstOrDefaultIQueryable1 source+383 RefahiWeb.Controllers.ComplexRequestController.AllRequestsAllable1 requestPeriodID，String personelCode，String fromDate，String toDate，Nullable1 requestStatus，Nullable1 complex，Nullable1 registrationType，Nullable1 requestCode，Nullable1 requestType，Boolean firstReference+12644 lambda_方法闭包，控制器基，对象[]+655 System.Web.Mvc.ReflectedActionDescriptor.ExecuteControllerContext controllerContext，IDictionary2参数+261 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodControllerContext controllerContext，ActionDescriptor ActionDescriptor，IDictionary2参数+39 System.Web.Mvc.Async.c__显示类42.b__41+34 System.Web.Mvc.Async.c\u显示类39.b\u 33+129 System.Web.Mvc.Async.c__显示Class4F.b__49+920775 System.Web.Mvc.Async.c___显示类37.b__36IAsyncResult asyncResult+15 System.Web.Mvc.Async.c__显示Class2A.b__20+33 System.Web.Mvc.Async.c__显示类25.b__22IAsyncResult asyncResult+921580 System.Web.Mvc.c__DisplayClassAD.b__18IAsyncResultAsyncResult+28 System.Web.Mvc.Async.c___显示类4.b__3IAsyncResult ar+20 System.Web.Mvc.Controller.EndExecuteCoreIAsyncResult asyncResult+67 System.Web.Mvc.Async.c___显示类4.b__3IAsyncResult ar+20 System.Web.Mvc.Controller.EndExecuteAsyncResult asyncResult+53 System.Web.Mvc.c__显示Class8.b__3IAsyncResultAsyncResult+42 System.Web.Mvc.Async.c___显示类4.b__3IAsyncResult ar+20 System.Web.Mvc .MvcHandler.EndProcessRequestIAsyncResult异步结果+53 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IEExecutionStep.Execute+453 System.Web.HttpApplication.executesteppexecutionstep步骤，布尔值&同步完成+371

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提前感谢您的帮助。

找到了。requestTypeList为空。

的可能重复项