Xamarin.Forms - BeginInvokeOnMainThread for an async Action

Question

I am familiar with the rules about updating UI elements on the UI thread using the Device.BeginInvokeOnMainThread, however I have an operation that needs to be run on the UI

Answer 1

Just make sure you handle exceptions in your Action and you should be fine. The problem you described occurs when you don't handle the exceptions. Below is a very simple example of running an async method from the main thread.

private void Test()
{
    Device.BeginInvokeOnMainThread(SomeMethod);
}

private async void SomeMethod()
{
    try
    {
        await SomeAsyncMethod();
    }
    catch (Exception e) // handle whatever exceptions you expect
    {
        //Handle exceptions
    }
}

private async Task SomeAsyncMethod()
{
    await Navigation.PushModalAsync(new ContentPage());
}