Go语言视频零基础入门到精通

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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)：
http://www.json.org/
  
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;

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：



JSON Object
[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：
  



WriteObject


  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：
  



ReadObject


  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：


JSON
string
  
is
:
{
"
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