async void Save_Clicked(object sender, EventArgs e)
{
_viewModel = (CourseViewModel)BindingContext;
var successful = _viewModel.Save();
if (successful)
{
await Navigation.PopAsync();
}
}
private void btnSave_Click(object sender, RoutedEventArgs e)
{
Course = (tblCours)this.DataContext;
courseViewModel.Save(Course);
}