async Task ExecuteLoadItemsCommand()
{
if (IsBusy)
{
return;
}
IsBusy = true;
try
{
Categorias.Clear();
var categorias = await CategoriaDataStore.GetItemsAsync(true);
foreach (var item in categorias)
{
Categorias.Add(item);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
finally
{
IsBusy = false;
}
}
public CategoriaViewModel()
{
Title = "Browse";
Categorias = new ObservableCollection <Categoria>();
LoadItemsCommand = new Command(async() => await ExecuteLoadItemsCommand());
MessagingCenter.Subscribe <NovaCategoriaPage, Categoria>(this, "AddCategoria", async(obj, categoria) =>
{
var novaCategoria = categoria as Categoria;
Categorias.Add(novaCategoria);
await CategoriaDataStore.AddItemAsync(novaCategoria);
});
}
