MobileServiceInvalidOperationException is thrown on Xamarin.WindowsPhone 8.1 project

Question

I'm trying to use Azure Mobile Services and Xamarin. I follow all instuctions of official tutorial, created Azure backend for application and downloaded sample quick-start app for Xamarin.Forms from Azure. There is code in TodoItemManager.cs :

public async Task<ObservableCollection<TodoItem>> GetTodoItemsAsync(bool syncItems = false)
    {
        try
        {
            IEnumerable<TodoItem> items = await todoTable
                .Where(todoItem => !todoItem.Done)
                .ToEnumerableAsync();

            return new ObservableCollection<TodoItem>(items);
        }
        catch (MobileServiceInvalidOperationException msioe)
        {
            Debug.WriteLine(@"Invalid sync operation: {0}", msioe.Message);
        }
        catch (Exception e)
        {
            Debug.WriteLine(@"Sync error: {0}", e.Message);
        }
        return null;
    }

And I got MobileServiceInvalidOperationException with message " Invalid sync operation: The request could not be completed. (Not Found) ".
I have tested Azure Backend on UWP App and it works fine. So looks like there is problem in WP8.1 project. Can anybody help with this exception?

Answer 1

所以..我忘了在Windows Phone上启用Internet连接