private void lvWarningsList_ItemSelected(object sender, SelectedItemChangedEventArgs e)
 {
     lvWarningsList.SelectedItem = Color.Transparent;
     try
     {
         var index = (lvWarningsList.ItemsSource as ObservableCollection <SetWarningsList>).IndexOf(e.SelectedItem as SetWarningsList);
         var a     = new SetWarningsList();
         ObservableCollection <SetWarningsList> dt = new ObservableCollection <SetWarningsList>();
         App.NavigateMasterDetail(new WarningDetail(list[index]));
     }
     catch { }
 }
 private async void btnAccess_Clicked(object sender, EventArgs e)
 {
     try
     {
         var             item      = (Xamarin.Forms.Button)sender;
         SetWarningsList lstitem   = (from items in dt where items.id == item.CommandParameter.ToString() select items).FirstOrDefault <SetWarningsList>();
         string          device_id = lstitem.id.ToString();
         try
         {
             App.NavigateMasterDetail(new WebViewPage(device_id));
         }
         catch { }
     }
     catch (Exception ex)
     {
         await DisplayAlert("Error!", ex.Message, "Ok");
     }
 }