Allow ObservableProperty to be used in classes implementing INotifyPropertyChanged

[Moreno-Gentili]

Hi everyone, suppose I liked my view models to be close to their view. So close, in fact, that I'd define my commands and properties in the code behind file (easier to understand, less files to manage).

[ObservableObject]
public partial class MyClass : ContentView
{
    public MyClass()
    {
        InitializeComponent();
        BindingContext = this;
    }

    [ObservableProperty]
    int myProperty;

    [RelayCommand]
    void MyCommand()
    {
        MyProperty += 1;
    }
}

Unfortunately, this is not allowed. The error MVVMTK0002 is shown.

Cannot apply `[ObservableObject]` to type {type}, as it already declares the `INotifyPropertyChanged` interface.

What's exactly the problem here? Since a ContentView is already implementing INotifyPropertyChanged, the source generator should just add the missing parts.

[brminnick]

Hi @Moreno-Gentili!

You'll want to open a discussion on the MVVM Toolkit repo, https://GitHub.com/CommunityToolkit/dotnet

[Moreno-Gentili]

Thanks, I'm closing this.