[Android] Command binding throws System.InvalidCastException

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The main purpose of the toolkit is to accelerate the creation and development of MVVM applications in Xamarin.Android, Xamarin.iOS, Xamarin.Forms, Windows 10 UWP, Windows Presentation Foundation (WPF), Silverlight, Windows Phone.

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[Android] Command binding throws System.InvalidCastException #38

Open Opachl opened 6 years ago

Opachl commented 6 years ago

Platform: Android Version: GalaSoft.MvvmLight.Platform, Version=5.4.1.0

Pseudo-Code for Bug Description

Query = root.FindViewById<SearchView>(Resource.Id.search); Query.SetCommand<QueryTextSubmitEventArgs>("QueryTextSubmit", ViewModel.TestCMD);

This throws always System.InvalidCastException: Specified cast is not valid.

I also tried other overloads and combinations result is Always the same

MichalPetryk commented 6 years ago

Hi, I can confirm above issue. I face the same problem when i'm trying to set command on EditText's event.

id = FindViewById<EditText>(Resource.Id.edit_id); id.SetCommand("FocusChange", Vm.IdCommand);

Temporary workaround is:

id.FocusChange += (a, b) => { if (Vm.IdCommand.CanExecute(b)) Vm.IdCommand.Execute(b); };

MichaelShapiro commented 5 years ago

isn't this exact situation described in the documentation here?: http://www.mvvmlight.net/doc/xam1.cshtml