deserialize到类返回null

deserialize到类返回null

本文介绍了Jsonconvert.deserialize到类返回null的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

为什么jsoncovert反序列化会返回null?

Why does jsoncovert deserialization return null?

string strjson = "{\"testinfo\":" +                          "[{\"testid\":1,\"testshortdescription\":\"tanktest\",\"testlongdescription\":\"Tank Test \",\"testtypeid\":2,\"testlimitsid\":null}," +                            "{\"testid\":2,\"testshortdescription\":\"FuelPump1\",\"testlongdescription\":\"Fuel Pump 1\",\"testtypeid\":4,\"testlimitsid\":null}," +                            "{\"testid\":3,\"testshortdescription\":\"FuelPump2\",\"testlongdescription\":\"Fuel Pump 2\",\"testtypeid\":4,\"testlimitsid\":null}," +                          "{\"testid\":4,\"testshortdescription\":\"TankAudit\",\"testlongdescription\":\"Tank Chamber Audit\",\"testtypeid\":6,\"testlimitsid\":null}]}";




TestInfoCollectionCS testinfocollections = JsonConvert.DeserializeObject<TestInfoCollectionCS>(strjson);



这是TestCS类:


Here is the TestCS class:

using System;
using System.Collections.Generic;
using System.Text;
namespace TestITMobileApp.Models
{
    public class TestCS
    {
        #region "Private variables""
        private int TestID;
        private string TestShortDescription;
        private string TestLongDescription;
        private int? TestTypeID;
        private int? TestLimitsID;
        #endregion
        #region "Properties"
        #region "testid"
        public int testid { get => TestID; set => TestID = value; }
        #endregion
        #region "testshortdescription"
        public string testshortdescription { get => TestShortDescription; set => TestShortDescription = value; }
        #endregion
        #region "testlongdescription"
        public string testlongdescription { get => TestLongDescription; set => TestLongDescription = value; }
        #endregion
        #region "testtypeid"
        public int? testtypeid { get => TestTypeID; set => TestTypeID = value; }
        #endregion
        #region "testlimitsid"
        public int? testlimitsid { get => TestLimitsID; set => TestLimitsID = value; }
        #endregion
        #endregion
    }
}



包含列表类的TestInfoCollectionCS类:


The class TestInfoCollectionCS that contains the list class:

using System;
using System.Collections.Generic;
using System.Text;
using TestITMobileApp.Model;
using TestITMobileApp.Models;

namespace TestITMobileApp.App_Data
{
    public class TestInfoCollectionCS
    {
        private List<TestCS> testinfocollection;

        public List<TestCS> TestInfoCollection { get => testinfocollection; set => testinfocollection = value; }
    }
}





我尝试了什么:



反序列化返回null?



What I have tried:

Deserialization returning null?

推荐答案

public class Testinfo
    {
    public int testid { get; set; }
    public string testshortdescription { get; set; }
    public string testlongdescription { get; set; }
    public int testtypeid { get; set; }
    public object testlimitsid { get; set; }
    }

public class RootObject
    {
    public List<Testinfo> testinfo { get; set; }
    }

而不是TestCS。



如果我尝试使用这些类,它会反序列化为单个列表中的实例:

Instead of TestCS.

If I try with those classes, it deserializes fine as a single instance in the list:

string strjson = "{\"testinfo\":" + "[{\"testid\":1,\"testshortdescription\":\"tanktest\",\"testlongdescription\":\"Tank Test \",\"testtypeid\":2,\"testlimitsid\":null}," + "{\"testid\":2,\"testshortdescription\":\"FuelPump1\",\"testlongdescription\":\"Fuel Pump 1\",\"testtypeid\":4,\"testlimitsid\":null}," + "{\"testid\":3,\"testshortdescription\":\"FuelPump2\",\"testlongdescription\":\"Fuel Pump 2\",\"testtypeid\":4,\"testlimitsid\":null}," + "{\"testid\":4,\"testshortdescription\":\"TankAudit\",\"testlongdescription\":\"Tank Chamber Audit\",\"testtypeid\":6,\"testlimitsid\":null}]}";
Console.WriteLine("{0}", strjson);
RootObject x = Newtonsoft.Json.JsonConvert.DeserializeObject<RootObject>(strjson);
Testinfo ti = x.testinfo[0];


这篇关于Jsonconvert.deserialize到类返回null的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-01 17:53