[NullReferenceException: Object reference not set to an instance of an object.]
WebDoAnTotNghiep.Controllers.<>c__DisplayClass1d.<d>b__1a(Subject c) in E:\Website Moi\WebDoAnTotNghiep\WebDoAnTotNghiep\Controllers\doanController.cs:90
System.Linq.WhereListIterator`1.MoveNext() +77
System.Linq.Buffer`1..ctor(IEnumerable`1 source) +123
System.Linq.<GetEnumerator>d__1.MoveNext() +184
System.Linq.Enumerable.Count(IEnumerable`1 source) +185
lambda_method(Closure ) +49
System.Linq.EnumerableExecutor`1.Execute() +94
System.Linq.EnumerableQuery`1.System.Linq.IQueryProvider.Execute(Expression expression) +73
System.Linq.Queryable.Count(IQueryable`1 source) +204
MvcPaging.PagedList`1.Initialize(IQueryable`1 source, Int32 index, Int32 pageSize, Nullable`1 totalCount) in E:\Website Moi\WebDoAnTotNghiep\WebDoAnTotNghiep\Helpers\MvcPaging\PagedList.cs:63
MvcPaging.PagedList`1..ctor(IEnumerable`1 source, Int32 index, Int32 pageSize, Nullable`1 totalCount) in E:\Website Moi\WebDoAnTotNghiep\WebDoAnTotNghiep\Helpers\MvcPaging\PagedList.cs:16
MvcPaging.PagedList`1..ctor(IEnumerable`1 source, Int32 index, Int32 pageSize) in E:\Website Moi\WebDoAnTotNghiep\WebDoAnTotNghiep\Helpers\MvcPaging\PagedList.cs:10
MvcPaging.PagingExtensions.ToPagedList(IEnumerable`1 source, Int32 pageIndex, Int32 pageSize) in E:\Website Moi\WebDoAnTotNghiep\WebDoAnTotNghiep\Helpers\MvcPaging\PagingExtensions.cs:77
WebDoAnTotNghiep.Controllers.doanController.d(String id, Nullable`1 page) in E:\Website Moi\WebDoAnTotNghiep\WebDoAnTotNghiep\Controllers\doanController.cs:91
lambda_method(Closure , ControllerBase , Object[] ) +124
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +205
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
System.Web.Mvc.<>c__DisplayClassa.<InvokeActionMethodWithFilters>b__7() +56
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +256
System.Web.Mvc.<>c__DisplayClassc.<InvokeActionMethodWithFilters>b__9() +22
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +190
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +363
System.Web.Mvc.Controller.ExecuteCore() +193
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +28
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext) +142
System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) +42
System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext httpContext) +10
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +195
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +50
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +73
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