private async void ShowInfo(int?obj)
 {
     try
     {
         if (obj != null)
         {
             var index  = (int)obj;
             var objsup = ListSupplier.SingleOrDefault(t => t.SupID == index);
             Name     = objsup.Name;
             Delegate = objsup.Delegate;
             Phone    = objsup.Phone;
             Email    = objsup.Email;
             SupID    = obj.ToString();
             SupImg   = objsup.Avatar.LoadImage();
             DialogHost.CloseDialogCommand.Execute(null, null);
             await DialogHost.Show(new SupplierProfile(), DialogHostId);
         }
     }
     catch
     {
         dc.Content = "Có Lỗi";
         dc.Tilte   = "Thông Báo";
         dialog     = new DialogOk()
         {
             DataContext = dc
         };
         DialogHost.CloseDialogCommand.Execute(null, null);
         await DialogHost.Show(dialog, DialogHostId);
     }
 }
        private async void DeleteSup(int?obj)
        {
            try
            {
                dc = new DialogContent()
                {
                    Content = "Bạn muốn xóa nhà cung cấp này ?", Tilte = "Thông Báo"
                };
                var dialogYS = new DialogYesNo()
                {
                    DataContext = dc
                };
                var result = (bool)await DialogHost.Show(dialogYS, DialogHostId);

                if (result)
                {
                    if (obj != null)
                    {
                        if (await supplier_repo.Remove((int)obj))
                        {
                            ListSupplier.Remove(ListSupplier.SingleOrDefault(t => t.SupID == (int)obj));
                            dc = new DialogContent()
                            {
                                Content = "Xóa Thành Công", Tilte = "Thông Báo"
                            };
                            dialog = new DialogOk()
                            {
                                DataContext = dc
                            };
                            await DialogHost.Show(dialog, DialogHostId);
                        }
                        else
                        {
                            dc = new DialogContent()
                            {
                                Content = "Xóa Thất Bại", Tilte = "Thông Báo"
                            };
                            dialog = new DialogOk()
                            {
                                DataContext = dc
                            };
                            await DialogHost.Show(dialog, DialogHostId);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                dc.Content = "Có Lỗi";
                dc.Tilte   = "Thông Báo";
                dialog     = new DialogOk()
                {
                    DataContext = dc
                };
                DialogHost.CloseDialogCommand.Execute(null, null);
                await DialogHost.Show(dialog, DialogHostId);
            }
        }