void GetData() { bool dba; if (rdnhanvien.IsChecked==true) dba=true; else dba=false; grid.ShowLoadingPanel = true; QLThuebaoDomainContext db = new QLThuebaoDomainContext(); InvokeOperation<System.Nullable<int>> p = db.Excute_TKDoanhThuGanNV(App.kythuat,dba,thang.DateTime); p.Completed += new EventHandler(Completed); }