async void GetCustomBase(object sender, RoutedEventArgs e) { Product product = await AtTest.GetCustomBase(); if (product == null) { _tbInfo.Text = "调用不成功!"; } else { StringBuilder sb = new StringBuilder(); sb.AppendFormat("Name: {0}\r\n", product.Name); sb.AppendFormat("ExpiryDate: {0}\r\n", product.ExpiryDate.ToString("yyyy-MM-dd")); sb.AppendFormat("Price : {0}\r\n", product.Price); sb.Append("Sizes: "); foreach (string size in product.Sizes) { sb.Append(size + " "); } _tbInfo.Text = string.Format("调用成功:\r\n{0}", sb); } }