我有一个项目,我需要在其中读取来自 Http 服务器的响应。响应是在 Json 中。来自该 json 的对象图反序列化为大部分工作,但是最低级别的数组失败,留下空值。
我在下面创建了可以粘贴到空白测试项目中并运行的代码。唯一的测试失败了,我不知道为什么。示例 Json 是顶部的 const 字符串。
我发现 JavaScriptSerializer
中的 System.Web.Extensions
确实有效(当我使用 List 而不是数组时)。但是,Json.Net 等效项不起作用。下面的示例中有两个测试,Newtonsoft 一个失败了,但为什么呢?我遗漏了哪些 Newtonsoft 文档?
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Newtonsoft.Json;
using System.Collections.Generic;
/// <summary>
/// Unit Test project that also includes a reference to System.Web.Extensions.
/// Also includes Newtonsoft from NuGet.
/// The constant `_downloadRootObjectEg` holds the sample json.
/// </summary>
namespace Savaged
{
[TestClass]
public class DownloadDeserialisationTest
{
private const string _downloadRootObjectEg = "{ \"error\": \"\", \"success\": true, \"data\": [{ \"data\": [{ \"TextSearched\": \"New product\", \"TextFound\": \"New product\", \"data \": [{ \"x\": 0.585, \"y\": 0.21496437 }, { \"x\": 0.63666666, \"y\": 0.21496437 }, { \"x\": 0.6933333, \"y\": 0.23515439 } ], \"Page\": 16 }, { \"TextSearched\": \"Expiry\", \"TextFound\": \"Expiry\", \"data \": [{ \"x\": 0.6666667, \"y\": 0.16270784 }, { \"x\": 0.7133333, \"y\": 0.16270784 }, { \"x\": 0.7133333, \"y\": 0.18052256 }, { \"x\": 0.6666667, \"y\": 0.18052256 } ], \"Page\": 39 }, { \"TextSearched\": \"Expiry\", \"TextFound\": \"Expiry\", \"data \": [{ \"x\": 0.47833332, \"y\": 0.6686461 }, { \"x\": 0.52166665, \"y\": 0.6686461 }, { \"x\": 0.52166665, \"y\": 0.6864608 }, { \"x\": 0.47833332, \"y\": 0.6864608 } ], \"Page\": 43 } ], \"context\": { \"FileLocation\": \"Product-09-08-2007.pdf\", \"ID\": 1, \"Type\": \"product\" } }, { \"data\": [{ \"TextSearched\": \"New product\", \"TextFound\": \"New product\", \"data \": [{ \"x\": 0.585, \"y\": 0.21496437 }, { \"x\": 0.63666666, \"y\": 0.21496437 }, { \"x\": 0.6933333, \"y\": 0.23515439 }, { \"x\": 0.6433333, \"y\": 0.23515439 } ], \"Page\": 16 }, { \"TextSearched\": \"Expiry\", \"TextFound\": \"Expiry\", \"data \": [{ \"x\": 0.6666667, \"y\": 0.16270784 }, { \"x\": 0.7133333, \"y\": 0.16270784 }, { \"x\": 0.7133333, \"y\": 0.18052256 }, { \"x\": 0.6666667, \"y\": 0.18052256 } ], \"Page\": 39 } ], \"context\": { \"FileLocation\": \"Product-09-08-2007.pdf\", \"ID\": 1, \"Type\": \"product\" } } ], \"count\": 2 }";
[TestMethod]
public void DeserialiseTest()
{
var downloadRootObject =
JsonConvert.DeserializeObject<DownloadRootObject>(_downloadRootObjectEg);
Assert.IsNotNull(downloadRootObject.Data[0].Data[0].Data, "Why?");
}
[TestMethod]
public void JavaScriptSerializerTest()
{
var downloadRootObject = new System.Web.Script.Serialization.
JavaScriptSerializer().Deserialize<DownloadRootObject>(_downloadRootObjectEg);
Assert.IsNotNull(downloadRootObject.Data[0].Data[0].Data, "Why?");
}
}
#region Concrete implementation
public abstract class RootObjectBase
{
public string Error { get; set; }
public bool Success { get; set; }
}
public class DownloadRootObject : RootObjectBase
{
public DownloadRootObject()
{
Data = new List<WordSearch>();
}
[JsonConstructor]
public DownloadRootObject(List<WordSearch> data)
{
Data = data;
}
public List<WordSearch> Data { get; set; }
public int Count { get; set; }
}
public class WordSearch
{
public WordSearch()
{
Data = new List<Match>();
}
[JsonConstructor]
public WordSearch(Context context, List<Match> data)
{
Context = context;
Data = data;
}
public Context Context { get; set; }
public List<Match> Data { get; set; }
}
public class Context
{
public string FileLocation { get; set; }
public int ID { get; set; }
public string Type { get; set; }
}
public class Match
{
public Match()
{
Data = new List<PointF>();
}
[JsonConstructor]
public Match(List<PointF> data)
{
Data = data;
}
public int Page { get; set; }
// TODO switch this to System.Drawing.PointF
public List<PointF> Data { get; set; }
public string TextSearched { get; set; }
public string TextFound { get; set; }
}
public class PointF
{
public float X { get; set; }
public float Y { get; set; }
}
#endregion
}
非常感谢所有帮助!
最佳答案
从我所看到的,提到的列表没有被反序列化,因为最低级别的“数据”属性中有一个尾随空格。
\"data \": [{ \"x\": 0.585, \"y\": 0.21496437 }
但实际上应该是:
\"data\": [{ \"x\": 0.585, \"y\": 0.21496437 }
关于c# - 第三级的 Object List<T> 不使用 Newtonsoft Json.Net 反序列化(在文档中找不到解决方案),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/52740469/