发布：2015/5/31 15:31:45作者：管理员 来源：本站 浏览次数：1310
C#中使用JSON不需要使用第三方库，使用.NET Framwork3.5自带的System.Runtime.Serialization.Json即可很好的完成JSON的解析。
关于JSON的入门介绍见(首页的图很形象)：
一、Using
需要添加引用：System.ServiceModel.Web 和 System.Runtime.Serialization，然后使用Using：
using System.Runtime.Serialization.Json;
using System.Runtime.Serialization;
using System.Runtime.Serialization;
二、定义序列化的类
假如我们要转化的JSON字符串格式为：
"encoding":"UTF-8",
"plug-ins":["python","c++","ruby"],
"indent":{
"length":3,
"use_space":true
}
}
然后编写相应的序列化的类，注意下面类加的Attribute：
[DataContract(Namespace = "http://coderzh.cnblogs.com")]class Config
{
[DataMember(Order = 0)]
public string encoding { get; set; }
[DataMember(Order = 1)]
public string[] plugins { get; set; }
[DataMember(Order = 2)]
public Indent indent { get; set; }
}
[DataContract(Namespace = "http://coderzh.cnblogs.com")]
class Indent
{
[DataMember(Order = 0)]
public int length { get; set; }
[DataMember(Order = 1)]
public bool use_space { get; set; }
}
三、对象转化为JSON字符串
使用WriteObject方法：
var config = new Config(){
encoding = "UTF-8",
plugins = new string[]{"python", "C++", "C#"},
indent = new Indent(){ length = 4, use_space = false}
};
var serializer = new DataContractJsonSerializer(typeof(Config));
var stream = new MemoryStream();
serializer.WriteObject(stream, config);
byte[] dataBytes = new byte[stream.Length];
stream.Position = 0;
stream.Read(dataBytes, 0, (int)stream.Length);
string dataString = Encoding.UTF8.GetString(dataBytes);
Console.WriteLine("JSON string is:");
Console.WriteLine(dataString);
四、JSON字符串转对象
使用ReadObject方法：
var mStream = new MemoryStream(Encoding.Default.GetBytes(dataString));
Config readConfig = (Config)serializer.ReadObject(mStream);
Console.WriteLine("Encoding is: {0}", readConfig.encoding);
foreach (string plugin in readConfig.plugins)
{
Console.WriteLine("plugins is: {0}", plugin);
}
Console.WriteLine("indent.length is: {0}", readConfig.indent.length);
Console.WriteLine("indent.use_space is: {0}", readConfig.indent.use_space);
五、输出结果：
{"encoding":"UTF-8","plugins":["python","C++","C#"],"indent":{"length":4,"use_space":false}}
Encoding is: UTF-8
plugins is: python
plugins is: C++
plugins is: C#
indent.length is: 4
indent.use_space is: False
