How to execute command when set the viewModel?

Question

I set ProductDetailViewModel to bindingContext of ProductDetail

I want it auto run function that get the detail.

public async Task GetProductDetailAsync()
{
}

int the ViewModel

can it auto or I have to run it in onAppearing?

Answer 1

You can run it on the viewmodel constructor with a Task.Run(async()=> await GetProductDetailAsync)

Or you can run in the OnAppearing. OnAppearing is an event so you can convert to a command using EventToCommandBehaviour in the CommunityToolkit.Maui

    <ContentPage.Behaviors>
        <mct:EventToCommandBehavior Command="{Binding AppearingCommand}" EventName="Appearing" />
        <mct:EventToCommandBehavior Command="{Binding DisappearingCommand}" EventName="Disappearing" />
    </ContentPage.Behaviors>