c# - 从移动服务表获取数据

Question

我想从 Azure 获取数据。这是我的代码:

private async void FindPromotion()
    {
        MobileServiceCollection<Promotions, Promotions> result;
        MobileServiceInvalidOperationException exception = null;

        string _place = textInputPlace.Text;

        if (_place!= null)
        {
            try
            {
                //lista obiektów Category
                result = await todoTable2.Where(todoItem => todoItem.Place==_place)
                    .Select(todoItem => todoItem.Products, todoItem => todoItem.Description)
                    .ToCollectionAsync();                

            }
            catch (MobileServiceInvalidOperationException ex)
            {
                exception = ex;
            }

            if (exception != null)
            {
                await new MessageDialog(exception.Message, "Can't find items").ShowAsync();
            }
            else
            {
                ListItems.ItemsSource = result.Distinct();
            }

        }
    }

我有错误:

“Select”方法没有重载，需要 2 个参数。

有人知道吗？还有另一种获取此数据的方法吗？

Answer 1

这是选择多列的方法:

result = await todoTable2.Select(todoItem => new { todoItem.Products , todoItem.Description}).ToCollectionAsync();