Tôi đang sử dụng EF 4 để lấy danh sách Nhân viên.System.ObjectDisposedException: Trường hợp ObjectContext đã được xử lý và không còn có thể được sử dụng cho các hoạt động yêu cầu kết nối
public ContentResult AutoCompleteResult(string searchText)
{
List<Employee> list = Employee.GetAllCurrentEmployees();
List<Employee> filteredEmployees = list
.Where(x => x.GetName().ToLower().Contains(searchText.ToLower()))
.ToList();
JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
var jsonString = jsonSerializer.Serialize(filteredEmployees).ToString();
return Content(jsonString);
}
Danh sách được truy xuất OK, nhưng khi tôi sắp xếp, tôi nhận ngoại lệ này;
System.ObjectDisposedException: The ObjectContext instance has been
disposed and can no longer be used for
operations that require a connection.
Generated: Wed, 17 Nov 2010 16:06:56 GMT
System.ObjectDisposedException: The ObjectContext instance has been
disposed and can no longer be used for operations that require a connection.
at
System.Data.Objects.ObjectContext.EnsureConnection()
at
System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) at
System.Data.Objects.ObjectQuery`1.Execute(MergeOption mergeOption) at
System.Data.Objects.DataClasses.EntityCollection`1.Load(List`1 collection, MergeOption mergeOption) at
System.Data.Objects.DataClasses.EntityCollection`1.Load(MergeOption mergeOption) at
System.Data.Objects.DataClasses.RelatedEnd.Load() at
System.Data.Objects.DataClasses.RelatedEnd.DeferredLoad() at
System.Data.Objects.DataClasses.EntityCollection`1.System.Collections.IEnumerable.GetEnumerator() at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat
serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat
serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat
serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object
o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat
serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse,
SerializationFormat
serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat
serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object
o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat
serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object
obj, StringBuilder output, SerializationFormat serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object
obj, SerializationFormat serializationFormat) at
System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj) at
SHP.Controllers.EmployeeController.AutoCompleteResult(String searchText) in C:\Documents and Settings\geoffreypayne\My Documents\Visual Studio
2010\Projects\MVC\SHP\SHP\Controllers\EmployeeController.cs:line
623 at lambda_method(Closure , ControllerBase , Object[]) at
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) at
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext
controllerContext, IDictionary`2 parameters) at
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext
controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at
System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.InvokeActionMethodWithFilters>b__a()
at
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter
filter, ActionExecutingContext preContext, Func`1 continuation)
at
System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.<>c__DisplayClassf.<InvokeActionMethodWithFilters>b__c() at
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext
controllerContext, String actionName)
Tôi thấy điều này rất kỳ quặc. Tôi đã lấy danh sách nhân viên và DataContext đã được xử lý. Vậy tại sao tôi lại gặp lỗi này?
bạn có thể cung cấp đầy đủ các ngăn xếp dấu vết? –