如何在没有JSON.NET库的情况下解析JSON？

我正在尝试在Visual Studio 2011上为Windows 8构建Metro应用程序。在尝试执行该操作时，我遇到了一些如何在JSON不使用JSON.NET库的情况下进行解析的问题（它尚不支持Metro应用程序） 。

无论如何，我想解析一下：

{
   "name":"Prince Charming",
   "artist":"Metallica",
   "genre":"Rock and Metal",
   "album":"Reload",
   "album_image":"http:\/\/up203.siz.co.il\/up2\/u2zzzw4mjayz.png",
   "link":"http:\/\/f2h.co.il\/7779182246886"
}

您可以使用.NET 4.5中添加的System.Json命名空间中找到的类。您需要添加对System.Runtime.Serialization程序集的引用

该JsonValue.Parse（）方法解析JSON文本，并返回一个JsonValue：

JsonValue value = JsonValue.Parse(@"{ ""name"":""Prince Charming"", ...");

如果您传递带有JSON对象的字符串，则应该能够将该值转换为JsonObject：

using System.Json;


JsonObject result = value as JsonObject;

Console.WriteLine("Name .... {0}", (string)result["name"]);
Console.WriteLine("Artist .. {0}", (string)result["artist"]);
Console.WriteLine("Genre ... {0}", (string)result["genre"]);
Console.WriteLine("Album ... {0}", (string)result["album"]);

这些类与System.Xml.Linq命名空间中的类非常相似。

我用这个...但是从未做过任何Metro应用开发，所以我不知道对您可用的库有任何限制。（请注意，您需要将类标记为具有DataContract和DataMember属性）

public static class JSONSerializer<TType> where TType : class
{
    /// <summary>
    /// Serializes an object to JSON
    /// </summary>
    public static string Serialize(TType instance)
    {
        var serializer = new DataContractJsonSerializer(typeof(TType));
        using (var stream = new MemoryStream())
        {
            serializer.WriteObject(stream, instance);
            return Encoding.Default.GetString(stream.ToArray());
        }
    }

    /// <summary>
    /// DeSerializes an object from JSON
    /// </summary>
    public static TType DeSerialize(string json)
    {
        using (var stream = new MemoryStream(Encoding.Default.GetBytes(json)))
        {
            var serializer = new DataContractJsonSerializer(typeof(TType));
            return serializer.ReadObject(stream) as TType;
        }
    }
}

所以，如果您有这样的课程...

[DataContract]
public class MusicInfo
{
    [DataMember]
    public string Name { get; set; }

    [DataMember]
    public string Artist { get; set; }

    [DataMember]
    public string Genre { get; set; }

    [DataMember]
    public string Album { get; set; }

    [DataMember]
    public string AlbumImage { get; set; }

    [DataMember]
    public string Link { get; set; }

}

然后，您将像这样使用它...

var musicInfo = new MusicInfo
{
     Name = "Prince Charming",
     Artist = "Metallica",
     Genre = "Rock and Metal",
     Album = "Reload",
     AlbumImage = "http://up203.siz.co.il/up2/u2zzzw4mjayz.png",
     Link = "http://f2h.co.il/7779182246886"
};

// This will produce a JSON String
var serialized = JSONSerializer<MusicInfo>.Serialize(musicInfo);

// This will produce a copy of the instance you created earlier
var deserialized = JSONSerializer<MusicInfo>.DeSerialize(serialized);

对于那些没有4.5的人，这是我的读取json的库函数。它需要一个项目参考System.Web.Extensions。

using System.Web.Script.Serialization;

public object DeserializeJson<T>(string Json)
{
    JavaScriptSerializer JavaScriptSerializer = new JavaScriptSerializer();
    return JavaScriptSerializer.Deserialize<T>(Json);
}

通常，json是根据合同写出的。该合同通常可以将其编为（T）类。有时，您可以从json中提取一个单词，然后搜索对象浏览器以找到该类型。

用法示例：

鉴于json

{"logEntries":[],"value":"My Code","text":"My Text","enabled":true,"checkedIndices":[],"checkedItemsTextOverflows":false}

您可以将其解析为这样的RadComboBoxClientState对象：

string ClientStateJson = Page.Request.Form("ReportGrid1_cboReportType_ClientState");
RadComboBoxClientState RadComboBoxClientState = DeserializeJson<RadComboBoxClientState>(ClientStateJson);
return RadComboBoxClientState.Value;

您是否尝试过使用JavaScriptSerializer？还有DataContractJsonSerializer

您可以使用DataContractJsonSerializer。有关更多详细信息，请参见此链接。

using System;
using System.IO;
using System.Runtime.Serialization.Json;
using System.Text;

namespace OTL
{
    /// <summary>
    /// Before usage: Define your class, sample:
    /// [DataContract]
    ///public class MusicInfo
    ///{
    ///   [DataMember(Name="music_name")]
    ///   public string Name { get; set; }
    ///   [DataMember]
    ///   public string Artist{get; set;}
    ///}
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class OTLJSON<T> where T : class
    {
        /// <summary>
        /// Serializes an object to JSON
        /// Usage: string serialized = OTLJSON&lt;MusicInfo&gt;.Serialize(musicInfo);
        /// </summary>
        /// <param name="instance"></param>
        /// <returns></returns>
        public static string Serialize(T instance)
        {
            var serializer = new DataContractJsonSerializer(typeof(T));
            using (var stream = new MemoryStream())
            {
                serializer.WriteObject(stream, instance);
                return Encoding.Default.GetString(stream.ToArray());
            }
        }

        /// <summary>
        /// DeSerializes an object from JSON
        /// Usage:  MusicInfo deserialized = OTLJSON&lt;MusicInfo&gt;.Deserialize(json);
        /// </summary>
        /// <param name="json"></param>
        /// <returns></returns>
        public static T Deserialize(string json)
        {
            if (string.IsNullOrEmpty(json))
                throw new Exception("Json can't empty");
            else
                try
                {
                    using (var stream = new MemoryStream(Encoding.Default.GetBytes(json)))
                    {

                        var serializer = new DataContractJsonSerializer(typeof(T));
                        return serializer.ReadObject(stream) as T;
                    }
                }
                catch (Exception e)
                {
                    throw new Exception("Json can't convert to Object because it isn't correct format.");
                }
        }
    }
}