async Task ExecuteLoadItemsCommand()
{
if (IsBusy)
{
return;
}
IsBusy = true;
try
{
Notes.Clear();
var notes = await NoteDataStore.GetNotesAsync();
foreach (var note in notes)
{
Notes.Add(note);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
finally
{
IsBusy = false;
}
}
public ItemsViewModel()
{
Title = "NoteKeeper";
Notes = new ObservableCollection <Note>();
LoadItemsCommand = new Command(async() => await ExecuteLoadItemsCommand());
MessagingCenter.Subscribe <ItemDetailPage, Note>(this, "SaveNote",
async(sender, note) =>
{
Notes.Add(note);
await NoteDataStore.AddNoteAsync(note);
}
);
MessagingCenter.Subscribe <ItemDetailPage, Note>(this, "UpdateNote",
async(sender, note) =>
{
await NoteDataStore.UpdateNoteAsync(note);
await ExecuteLoadItemsCommand();
}
);
}
async void InitializeCourseList()
{
CourseList = await NoteDataStore.GetCoursesAsync();
}