分配给 Json 反序列化的列表为空

Question

由于我的上一个问题被标记为重复并且我没有在推荐中找到答案link我再次提出我的问题。

我想反序列化一些 JSON 数据并将其传递到我的 ASP.NET MVC 5 应用程序中查看。

我的模特：

public class OrderModel
{
    public string Seat { get; set; }
    public string objectId { get; set; }
    public DateTime? createdAt { get; set; }

}

我读过要将 JSON 数据反序列化到对象列表，我必须制作 "root" class 在这里：

public class OrderRootModel
{
    public List<OrderModel> OrderList { get; set; }

}

这是一个获取 ApiModel class 中的 JSON 数据并将其分配给列表的方法。 此方法可能有问题，因为它返回 null :

//ApiModel class
    public OrderRootModel GetOrderData()
        {

            string url = "https://api.parse.com/1/classes/Orders";

            OrderRootModel model = new OrderRootModel();
            model = JsonConvert.DeserializeObject<OrderRootModel>(getParseIdData(url));
            return model;
        }

这是一个获取JSON字符串的方法：

public string getParseIdData(string url)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Headers.Add("X-Parse-Application-Id", id);
            request.Headers.Add("X-Parse-REST-API-KEY", key);
            try
            {
                WebResponse response = request.GetResponse();
                using (Stream responseStream = response.GetResponseStream())
                {
                    StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
                    return reader.ReadToEnd();
                }
            }
            catch (WebException ex)
            {
                WebResponse errorResponse = ex.Response;
                using (Stream responseStream = errorResponse.GetResponseStream())
                {
                    StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
                    String errorText = reader.ReadToEnd();
                    Console.WriteLine(errorText);
                }
                throw;
            }
        }

这是 getParseIdData() 响应：

{"results":[{"Seat":"5","createdAt":"2015-11-29T18:50:15.320Z","objectId":"BsDSolYPsT","updatedAt":"2015-11-29T19:40:55.020Z"},{"Seat":"6","createdAt":"2015-12-02T22:31:36.892Z","objectId":"kQJ0R5TUvw","updatedAt":"2015-12-02T22:31:36.892Z"},{"Seat":"7","createdAt":"2015-12-02T22:31:40.261Z","objectId":"sVtdj3aipb","updatedAt":"2015-12-02T22:31:40.261Z"},{"Seat":"8","createdAt":"2015-12-02T22:31:43.082Z","objectId":"7oH2ySrDFH","updatedAt":"2015-12-02T22:31:43.082Z"}]}

我的控制器：

public ActionResult Index()
        {
            ApiModel model = new ApiModel();

            return View(model.GetOrderData()) ;
        }

所以我可能在 GetOrderData() 方法的某处犯了一个错误，因为它 returns 为空。你能帮我解决这个问题吗？

Answer 1

根据您的代码，将您的 JSON 转换为 C# Class

时，C# Class 应该是这样的

{
    "results":[
      {"Seat":"5","createdAt":"2015-11-29T18:50:15.320Z","objectId":"BsDSolYPsT","updatedAt":"2015-11-29T19:40:55.020Z"},
      {"Seat":"6","createdAt":"2015-12-02T22:31:36.892Z","objectId":"kQJ0R5TUvw","updatedAt":"2015-12-02T22:31:36.892Z"},
      {"Seat":"7","createdAt":"2015-12-02T22:31:40.261Z","objectId":"sVtdj3aipb","updatedAt":"2015-12-02T22:31:40.261Z"},
      {"Seat":"8","createdAt":"2015-12-02T22:31:43.082Z","objectId":"7oH2ySrDFH","updatedAt":"2015-12-02T22:31:43.082Z"}
      ]
}

public class Result
{
    public string Seat { get; set; }
    public string createdAt { get; set; }
    public string objectId { get; set; }
    public string updatedAt { get; set; }
}

public class RootObject
{
    public List<Result> results { get; set; }
}

分配给 Json 反序列化的列表为空

List assigned to Json deserialize is null

c#

null

json

deserialization