序列化/反序列化JSON.NET的对象字典

我试图序列化/反序列化Dictionary<string, object>这似乎工作正常，如果对象是一个简单的类型，但在对象更复杂时不起作用。序列化/反序列化JSON.NET的对象字典

我有这个类：

public class UrlStatus 
{ 
public int Status { get; set; } 
public string Url { get; set; } 
}

在我的字典里我加List<UrlStatus>与“重定向链”的关键和几个简单的字符串的钥匙“状态”，“地址”，“父代URL” 。我碰到JSON.Net后面的字符串看起来是这样的：

{"$type":"System.Collections.Generic.Dictionary`2[[System.String, mscorlib],[System.Object, mscorlib]], mscorlib","Status":"OK","Url":"http://www.ehow.com/m/how_5615409_create-pdfs-using-bean.html","Parent Url":"http://www.ehow.com/mobilearticle35.xml","Redirect Chain":[{"$type":"Demand.TestFramework.Core.Entities.UrlStatus, Demand.TestFramework.Core","Status":301,"Url":"http://www.ehow.com/how_5615409_create-pdfs-using-bean.html"}]}

的代码我使用序列化的样子：

JsonConvert.SerializeObject(collection, Formatting.None, new JsonSerializerSettings 
{ 
TypeNameHandling = TypeNameHandling.Objects, 
TypeNameAssemblyFormat = System.Runtime.Serialization.Formatters.FormatterAssemblyStyle.Simple 
});

反序列化我做：

JsonConvert.DeserializeObject<T>(collection, new JsonSerializerSettings 
{ 
TypeNameHandling = TypeNameHandling.Objects, 
TypeNameAssemblyFormat = System.Runtime.Serialization.Formatters.FormatterAssemblyStyle.Simple, 
});

字典恢复正常，所有字符串恢复正常，但列表没有得到正确的反序列化。它只是回来为

{[ 
    { 
    "$type": "XYZ.TestFramework.Core.Entities.UrlStatus, XYZ.TestFramework.Core", 
    "Status": 301, 
    "Url": "/how_5615409_create-pdfs-using-bean.html" 
    } 
]}

当然我可以再次deserailize这个字符串，我得到了正确的对象，但似乎JSON.Net应该这样做对我来说。很明显，我做错了什么，但我不知道它是什么。

来源

2010-09-17 Dan at Demand

我认为这是旧版Json.NET中的一个错误。如果您尚未使用最新版本，请升级并重试。

public class UrlStatus 
    { 
     public int Status { get; set; } 
     public string Url { get; set; } 
    } 


    [Test] 
    public void GenericDictionaryObject() 
    { 
     Dictionary<string, object> collection = new Dictionary<string, object>() 
     { 
      {"First", new UrlStatus{ Status = 404, Url = @"http://www.bing.com"}}, 
      {"Second", new UrlStatus{Status = 400, Url = @"http://www.google.com"}}, 
      {"List", new List<UrlStatus> 
      { 
       new UrlStatus {Status = 300, Url = @"http://www.yahoo.com"}, 
       new UrlStatus {Status = 200, Url = @"http://www.askjeeves.com"} 
      } 
      } 
     }; 

     string json = JsonConvert.SerializeObject(collection, Formatting.Indented, new JsonSerializerSettings 
     { 
     TypeNameHandling = TypeNameHandling.All, 
     TypeNameAssemblyFormat = FormatterAssemblyStyle.Simple 
     }); 

     Assert.AreEqual(@"{ 
    ""$type"": ""System.Collections.Generic.Dictionary`2[[System.String, mscorlib],[System.Object, mscorlib]], mscorlib"", 
    ""First"": { 
    ""$type"": ""Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests"", 
    ""Status"": 404, 
    ""Url"": ""http://www.bing.com"" 
    }, 
    ""Second"": { 
    ""$type"": ""Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests"", 
    ""Status"": 400, 
    ""Url"": ""http://www.google.com"" 
    }, 
    ""List"": { 
    ""$type"": ""System.Collections.Generic.List`1[[Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests]], mscorlib"", 
    ""$values"": [ 
     { 
     ""$type"": ""Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests"", 
     ""Status"": 300, 
     ""Url"": ""http://www.yahoo.com"" 
     }, 
     { 
     ""$type"": ""Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests"", 
     ""Status"": 200, 
     ""Url"": ""http://www.askjeeves.com"" 
     } 
    ] 
    } 
}", json); 

     object c = JsonConvert.DeserializeObject(json, new JsonSerializerSettings 
     { 
     TypeNameHandling = TypeNameHandling.All, 
     TypeNameAssemblyFormat = FormatterAssemblyStyle.Simple 
     }); 

     Assert.IsInstanceOfType(typeof(Dictionary<string, object>), c); 

     Dictionary<string, object> newCollection = (Dictionary<string, object>)c; 
     Assert.AreEqual(3, newCollection.Count); 
     Assert.AreEqual(@"http://www.bing.com", ((UrlStatus)newCollection["First"]).Url); 

     List<UrlStatus> statues = (List<UrlStatus>) newCollection["List"]; 
     Assert.AreEqual(2, statues.Count); 
    } 
    }

编辑，我只是注意到你提到了一个列表。 TypeNameHandling应该设置为All。

文档：TypeNameHandling setting

来源

2010-09-19 04:29:22

我使用Json.NET 3.5版本8我甚至下载的zip再次得到肯定。 – 2010-09-19 06:18:04

刚刚尝试了最新的版本53965，仍然没有工作。 – 2010-09-19 06:27:43

TypeNameHandling = TypeNameHandling.All是诀窍。 – 2010-09-19 19:02:53

序列化/反序列化JSON.NET的对象字典

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