async Task onDeleteTodoItemCommand(object obj)
{
if (IsBusy)
{
return;
}
IsBusy = true;
try
{
if (obj == null)
{
return;
}
ToDoItem itemToDelete = (ToDoItem)obj;
await _service.DeleteItem(itemToDelete.Key);
await Application.Current.MainPage.DisplayAlert("Delete OK", $"ToDo item {itemToDelete.Name} has been deleted correctly", "OK");
}
catch (Exception ex)
{
await Application.Current.MainPage.DisplayAlert("Item Not Deleted", ex.Message, "OK");
}
finally
{
IsBusy = false;
FetchItemsCommand.Execute(null);
}
}
async Task onEditTodoItemCommand()
{
if (IsBusy)
{
return;
}
IsBusy = true;
try
{
if (_selectedItem == null)
{
return;
}
_selectedItem.IsComplete = !_selectedItem.IsComplete;
await _service.UpdateItem(_selectedItem);
}
catch (Exception ex)
{
await Application.Current.MainPage.DisplayAlert("Item Not Updated", ex.Message, "OK");
}
finally
{
IsBusy = false;
FetchItemsCommand.Execute(null);
}
}
public MainPageViewModel()
{
Title = "Todo List";
_service = ServiceLocator.Instance.Resolve <IApiService>();
_navigationService = ServiceLocator.Instance.Resolve <INavigationService>();
// Subscribe to events from the Task Detail Page
MessagingCenter.Subscribe <ToDoViewModel>(this, "ItemChanged", async(sender) =>
{
await onFetchFieldsCommand();
});
FetchItemsCommand.Execute(null);
}