Entity framework 伊莱德。它属于分配单元7946994385574035456,不属于72057594046709760。 Calling 'Read' when the data reader is closed is not a valid operation. De
伊莱德。它属于分配单元7946994385574035456,不属于72057594046709760。Entity framework 伊莱德。它属于分配单元7946994385574035456,不属于72057594046709760。 Calling 'Read' when the data reader is closed is not a valid operation. De,entity-framework,Entity Framework,伊莱德。它属于分配单元7946994385574035456,不属于72057594046709760。 Calling 'Read' when the data reader is closed is not a valid operation. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace
Calling 'Read' when the data reader is closed is not a valid operation.
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.InvalidOperationException: Calling 'Read' when the data reader is closed is not a valid operation.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[InvalidOperationException: Calling 'Read' when the data reader is closed is not a valid operation.]
System.Data.Common.Internal.Materialization.Shaper`1.StoreRead() +93
System.Data.Common.Internal.Materialization.SimpleEnumerator.MoveNext() +30
System.Linq.Enumerable.Single(IEnumerable`1 source) +119
System.Data.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2(IEnumerable`1 sequence) +5
System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +25
System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +43
System.Linq.Queryable.Count(IQueryable`1 source) +240
BusinessLayer.Car.GetCarCount() in xxx
UserControls_SiteInfo.Page_Load(Object sender, EventArgs e) +225
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627