如何使用DataContractJsonSerializer解析嵌套的json对象?

问题描述

我有一个像这样的json文本:

I have a json text like this:

{
    "response":200,
    "result":
  {
      "package":
    {
      "token":"aaa"
    }
  }
}

我正在使用DataContractJsonSerializer从json以上的内容中提取信息.

I am using DataContractJsonSerializer to extract info from this above json.

public static T Deserialize<T>(string json)
{
    var instance = Activator.CreateInstance<T>();
    using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(json)))
    {
         var serializer = new DataContractJsonSerializer(instance.GetType());
         return (T)serializer.ReadObject(ms);
    }
}

我将这些类描述如下:

[DataContract]
class IttResponse
{
    [DataMember(Name = "response")]
    public int Response { get; protected set; }

    [DataMember(Name = "result")]
    public string Result { get; protected set; }
}

[DataContract]
public class IttPackage
{

    [DataMember(Name = "token")]
    public string Token { get; set; }
}

现在，我尝试按以下方式解析json文本:

Now, I tried to parse the json text as follow:

IttResponse response = Deserialize<IttResponse>(jsonText);
IttPackage package = Deserialize<IttPackage>(response.token);

但是，在第一行解析jsonText时总是会出错.

However, I always get error when parsing jsonText at the first line.

注意:我正在开发在用C#，VS Ultimate 2013，.Net Framework 4.5编写的桌面上运行的应用程序

Note: I am developing an application running on desktop written in C#, VS Ultimate 2013, .Net Framework 4.5

因此，我认为我无法使用 System.Web.Helpers 或 System.Web.Script.Serialization 进行解析.

So, I think, I cannot use System.Web.Helpers, or System.Web.Script.Serialization to parse.

推荐答案

序列化引擎可以理解复杂的类型.一种DataContract类型引用另一种DataContract类型是安全的.

The serialization engine understands complex types. It's safe for one DataContract type to reference another DataContract type.

(我不确定是否允许受保护的二传手)

[DataContract]
class IttResponse
{
    [DataMember(Name = "response")]
    public int Response { get; protected set; }

    [DataMember(Name = "result")]
    public IttResult Result { get; protected set; }
}

[DataContract]
public class IttResult
{
    [DataMember(Name = "package")]
    public IttPackage Package { get; set; }
}

[DataContract]
public class IttPackage
{
    [DataMember(Name = "token")]
    public string Token { get; set; }
}

用法与以前相同

IttResponse response = Deserialize(jsonText);

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