how to set up basic AsyncCommand with Task in xamarin form

Issue

Tools: I am using Xamarin.form MVVM.

Question: How do I set up basic AsyncCommand command with Task?

Debug: I am not getting any error, when I click on button, Displaybox alert doesnt show up. I check and addcommand method is not getting runned on tap.

Bind: I also have bind View with ViewModel

 BindingContext = new ProductViewModel();

I watched a tutorial by microsoft and there seem to be working just fine. Did I missed something?

View Page

<Button Text="Add" Command="{Binding AddCommand}" />

ViewModel Page

public class ProductViewModel : INotifyPropertyChanged
    {
       ...
      public AsyncCommand AddComamnd { get; }
       
      public ProductViewModel()
      {
        ...
        AddComamnd = new AsyncCommand(OnAddComamnd);
       }

  public async Task OnAddComamnd()
    {
        await App.Current.MainPage.DisplayAlert("Alert", "You have been alerted", "OK");
      // I have also tried both (App and Application) neither works
    }
}

Solution

ok, first of all there's a lot of typo, you put AddCommand here:

<Button Text="Add" Command="{Binding AddCommand}" />

So you need same command name:

public Command AddCommand { get; }

Then:

public ProductViewModel()
{
    ...
    AddCommand = new Command(async () => await OnAddComamnd()); //OnAddCommamnd is your async task
}

you can watch about command in here: Episode 5: MVVM & Data Binding with Xamarin.Forms start at minute 22

Answered By - Godya Aditya