Asp.net Linq，EF4，Linq查询后过滤数据
我想过滤Linq查询后的结果 并将其设置为List（）或Array（） 这是我的密码Asp.net Linq，EF4，Linq查询后过滤数据,asp.net,asp.net-mvc-3,linq,entity-framework,Asp.net,Asp.net Mvc 3,Linq,Entity Framework,我想过滤Linq查询后的结果 并将其设置为List（）或Array（） 这是我的密码 //for test, filter is always true bool filter = true; OrdersRepository ordersRepository = new OrdersRepository(); var productInQuery = ordersRepository.ProductIn; var productOutQuery = ordersRepository.Pro
//for test, filter is always true
bool filter = true;
OrdersRepository ordersRepository = new OrdersRepository();
var productInQuery = ordersRepository.ProductIn;
var productOutQuery = ordersRepository.ProductOut;
var productQuery = ordersRepository.Product;
var orderInfoQuery = ordersRepository.OrderInfo;
var result = (from p in productInQuery
join o in orderInfoQuery on p.refNo equals o.refNo
join x in productQuery on p.productNo equals x.no
join t in productOutQuery on p.no equals t.productInNo into productIn
from t in productIn.DefaultIfEmpty()
orderby o.processDate descending
select new reportModel
{
yourRef = o.yourRefNo,
modelNo = x.modelNo,
mfgNo = p.mfgNo,
serialNo = p.serialNo,
poNo = p.poNo,
lbs = p.lbs,
width = p.width,
height = p.height,
depth = p.depth,
qty = p.qty,
dateIn = o.processDate,
dateOut = (from m in orderInfoQuery where m.refNo == t.refNo select m.processDate).FirstOrDefault(),
etaDate = (from w in orderInfoQuery where w.refNo == t.refNo select w.eta).FirstOrDefault()
});
// Filter one more time
if (filter)
{
List<reportModel> a = (from q in result
where q.etaDate >= new DateTime(2012, 5, 20)
select q).ToList();
//var a = result.Where(q => q.etaDate >= new DateTime(2012, 5, 20)).ToList(); //I tried this too, but it does not work either.
}
else
{
var a = result.ToList();
}
//对于测试，筛选器始终为true
布尔滤波器=真；
OrdersRepository ordersepository=新订单repository（）；
var productInQuery=ordersepository.ProductIn；
var productOutQuery=ordersepository.ProductOut；
var productQuery=ordersepository.Product；
var orderInfoQuery=ordersepository.OrderInfo；
var result=（来自productInQuery中的p）
在p.refNo上的orderInfoQuery中加入o等于o.refNo
在p.productNo等于x.no的productQuery中加入x
将p.no上的productOutQuery中的t等于t.productInNo连接到productIn中
来自productIn.DefaultIfEmpty（）中的t
orderby o.processDate降序
选择新报告模型
{
yourRef=o.yourRefNo，
modelNo=x.modelNo，
mfgNo=p.mfgNo，
serialNo=p.serialNo，
poNo=p.poNo，
磅=磅，
宽度=p.width，
高度=p.高度，
深度=p.深度，
数量=p.qty，
dateIn=o.processDate，
dateOut=（从orderInfoQuery中的m开始，其中m.refNo==t.refNo选择m.processDate）。FirstOrDefault（），
etaDate=（从orderInfoQuery中的w开始，其中w.refNo==t.refNo选择w.eta）
});
//再过滤一次
如果（过滤器）
{
列表a=（从结果中的q开始）
其中q.etaDate>=新日期时间（2012,5,20）
选择q.ToList（）；
//var a=result.Where（q=>q.etaDate>=new-DateTime（2012,5,20））.ToList（）；//我也试过，但也不起作用。
}
其他的
{
var a=result.ToList（）；
}
Specified method is not supported.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NotSupportedException: Specified method is not supported.
Source Error:
Line 64: */
Line 65:
Line 66: var a = result.Where(q => q.etaDate >= new DateTime(2012, 5, 20)).ToList();
Line 67: }
Line 68: else
Source File: WebUI\Controllers\TestController.cs Line: 66
Stack Trace:
[NotSupportedException: Specified method is not supported.]
MySql.Data.Entity.SqlGenerator.Visit(DbApplyExpression expression) +28
System.Data.Common.CommandTrees.DbApplyExpression.Accept(DbExpressionVisitor`1 visitor) +23
MySql.Data.Entity.SqlGenerator.VisitInputExpression(DbExpression e, String name, TypeUsage type) +35
MySql.Data.Entity.SelectGenerator.VisitInputExpressionEnsureSelect(DbExpression e, String name, TypeUsage type) +21
MySql.Data.Entity.SelectGenerator.Visit(DbProjectExpression expression) +38
System.Data.Common.CommandTrees.DbProjectExpression.Accept(DbExpressionVisitor`1 visitor) +23
MySql.Data.Entity.SqlGenerator.VisitInputExpression(DbExpression e, String name, TypeUsage type) +35
MySql.Data.Entity.SelectGenerator.VisitInputExpressionEnsureSelect(DbExpression e, String name, TypeUsage type) +21
MySql.Data.Entity.SelectGenerator.Visit(DbFilterExpression expression) +37
System.Data.Common.CommandTrees.DbFilterExpression.Accept(DbExpressionVisitor`1 visitor) +23
MySql.Data.Entity.SqlGenerator.VisitInputExpression(DbExpression e, String name, TypeUsage type) +35
MySql.Data.Entity.SelectGenerator.VisitInputExpressionEnsureSelect(DbExpression e, String name, TypeUsage type) +21
MySql.Data.Entity.SelectGenerator.Visit(DbProjectExpression expression) +38
System.Data.Common.CommandTrees.DbProjectExpression.Accept(DbExpressionVisitor`1 visitor) +23
MySql.Data.Entity.SqlGenerator.VisitInputExpression(DbExpression e, String name, TypeUsage type) +35
MySql.Data.Entity.SelectGenerator.VisitInputExpressionEnsureSelect(DbExpression e, String name, TypeUsage type) +21
MySql.Data.Entity.SelectGenerator.Visit(DbProjectExpression expression) +38
System.Data.Common.CommandTrees.DbProjectExpression.Accept(DbExpressionVisitor`1 visitor) +23
MySql.Data.Entity.SqlGenerator.VisitInputExpression(DbExpression e, String name, TypeUsage type) +35
MySql.Data.Entity.SelectGenerator.VisitInputExpressionEnsureSelect(DbExpression e, String name, TypeUsage type) +21
MySql.Data.Entity.SelectGenerator.Visit(DbSortExpression expression) +63
System.Data.Common.CommandTrees.DbSortExpression.Accept(DbExpressionVisitor`1 visitor) +23
MySql.Data.Entity.SqlGenerator.VisitInputExpression(DbExpression e, String name, TypeUsage type) +35
MySql.Data.Entity.SelectGenerator.VisitInputExpressionEnsureSelect(DbExpression e, String name, TypeUsage type) +21
MySql.Data.Entity.SelectGenerator.Visit(DbProjectExpression expression) +38
System.Data.Common.CommandTrees.DbProjectExpression.Accept(DbExpressionVisitor`1 visitor) +23
MySql.Data.Entity.SelectGenerator.GenerateSQL(DbCommandTree tree) +60
MySql.Data.MySqlClient.MySqlProviderServices.CreateDbCommandDefinition(DbProviderManifest providerManifest, DbCommandTree commandTree) +334
System.Data.Common.DbProviderServices.CreateCommandDefinition(DbCommandTree commandTree) +147
System.Data.EntityClient.EntityCommandDefinition..ctor(DbProviderFactory storeProviderFactory, DbCommandTree commandTree) +526
[EntityCommandCompilationException: An error occurred while preparing the command definition. See the inner exception for details.]
System.Data.EntityClient.EntityCommandDefinition..ctor(DbProviderFactory storeProviderFactory, DbCommandTree commandTree) +1329
System.Data.EntityClient.EntityProviderServices.CreateCommandDefinition(DbProviderFactory storeProviderFactory, DbCommandTree commandTree) +97
System.Data.EntityClient.EntityProviderServices.CreateDbCommandDefinition(DbProviderManifest providerManifest, DbCommandTree commandTree) +198
System.Data.Common.DbProviderServices.CreateCommandDefinition(DbCommandTree commandTree) +147
System.Data.Objects.Internal.ObjectQueryExecutionPlan.Prepare(ObjectContext context, DbQueryCommandTree tree, Type elementType, MergeOption mergeOption, Span span, ReadOnlyCollection`1 compiledQueryParameters) +397
System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable`1 forMergeOption) +696
System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +149
System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator() +44
System.Data.Entity.Internal.Linq.InternalQuery`1.GetEnumerator() +40
System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnumerator() +40
System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +315
System.Linq.Enumerable.ToList(IEnumerable`1 source) +58
BseWms.WebUI.Controllers.TestController.dateTest() in C:\Users\mark\Documents\Visual Studio 2010\Projects\BseWms\BseWms.WebUI\Controllers\TestController.cs:66
lambda_method(Closure , ControllerBase , Object[] ) +62
System.Web.Mvc.<>c__DisplayClass1.<WrapVoidAction>b__0(ControllerBase controller, Object[] parameters) +17
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +208
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +55
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +263
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +19
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +191
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
System.Web.Mvc.Controller.ExecuteCore() +116
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8970349
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184
public class reportModel
{
public string yourRef {get; set;}
public string modelNo {get; set;}
public string mfgNo {get; set;}
public string serialNo {get; set;}
public string poNo {get; set;}
public Nullable<float> lbs { get; set; }
public Nullable<float> width { get; set; }
public Nullable<float> height { get; set; }
public Nullable<float> depth { get; set; }
public int qty {get; set;}
public Nullable<DateTime> dateIn { get; set; }
public Nullable<DateTime> dateOut { get; set; }
public Nullable<DateTime> etaDate { get; set; }
}
var thedate = new DateTime(2012, 5, 20);
List<reportModel> a = (from q in result
where q.etaDate >= thedate
select q).ToList();
List<reportModel> a = (from q in result
where q.etaDate >= new DateTime(2012, 5, 20) select q).ToList();
var date = new DateTime(2012, 5, 20);
List<reportModel> a = (from q in result
where q.etaDate >= date select q).ToList();
if(filter)
{
var dateFilter = new DateTime(2012, 5, 20);
result = result.Where(x => x.etaDate >= dateFilter);
}
return result.ToList(); //or .ToArray()