ICommand attribute in 8.0.0-preview4

[imsam67]

The ICommand attribute seems to have disappeared in 8.0.0-preview4. Has it been dropped or renamed or are we to use something different?

[Sergio0694]

It's still there, but it's been renamed to [RelayCommand] in #288 🙂

[Ahmadmansoor]

Ok, that's funny, now all new tuts by the pro guys have been through in, as any the new ppl for Maui will follow the tut and find it will not work.
by the way what happen to AlsoNotifyChangeFor too?

[Ahmadmansoor]

Ok I found it , I write it here just in case someone ask about it too
AlsoNotifyChangeFor >> become >>NotifyPropertyChangedFor

[imsam67]

I thought that might be the case but I couldn't get it to work. I'm using this in a .NET MAUI app view model. I use it like this but when I click the button, nothing happens. I put break points to test it and I never hit them.

using CommunityToolkit.Mvvm.Input;

public partial class MyViewModel : BaseViewModel
{
     [RelayCommand]
     public async Task DoSomething()
     {
         // Do something here...
     }
}

My BaseViewModel looks like this:

public partial class BaseViewModel : ObservableObject
{
     [ObservableProperty]
     bool isBusy = false;

     [ObservableProperty]
     string title = string.Empty;
 }

And in my ContentPage, I simply reference the DoSomething() method like this:

<Button
   Text="Submit"
   Command={Binding DoSomething} />

Am I doing somethng wrong here?

[Sergio0694]

The generated command will be called "DoSomethingCommand". You can actually see the generated code yourself if you expand the analyzer node in solution explorer.

[imsam67]

Great! Thank you!