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BLToolkit.Data.DataException: ExecuteReader requires an open and available Connection. The connection's current state is closed. ---> System.InvalidOperationException: ExecuteReader requires an open and available Connection. The connection's current state is closed. at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at BLToolkit.Data.DbManager.<>c__DisplayClass12.b__11() at BLToolkit.Data.DbManager.ExecuteOperation[T](OperationType operationType, Func`1 operation) --- End of inner exception stack trace --- at BLToolkit.Data.DbManager.OnOperationException(OperationType op, DataException ex) at BLToolkit.Data.DbManager.HandleOperationException(OperationType op, Exception ex) at BLToolkit.Data.DbManager.ExecuteOperation[T](OperationType operationType, Func`1 operation) at BLToolkit.Data.DbManager.ExecuteObjectInternal(Object entity, Type type, Object[] parameters) at BLToolkit.Data.DbManager.ExecuteObject[T]() at KapsNet.QuickOffice.BLToolkitDataProvider.BaseDao`1.GetByKey(Object[] keys) at KapsNet.QuickOffice.Core.Managers.AppSettingsManager.GetAppSettings[T]() at KapsNet.QuickOffice.ClientSite.Controllers.MasterController.ViewModel_NeedAppSeoSettings() at KapsNet.QuickOffice.ClientSite.Models.MasterViewData.get_AppSeoSettings() at KapsNet.QuickOffice.ClientSite.Controllers.MasterController.OnActionExecuted(ActionExecutedContext filterContext) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)