Use JSON in C #

Reprinted from http://www.cnblogs.com/vingi/articles/2578659.html

The third-party library is not required to use JSON in C #. You can use the system. runtime. serialization. JSON file that comes with. Net framwork3.5 to parse JSON.

For more information about JSON, see the following figure on the homepage ):

Http://www.json.org/

I. Using

You need to add reference: system. servicemodel. Web and system. runtime. serialization, and then use using

using System.Runtime.Serialization;using System.Runtime.Serialization.Json;

Ii. Define serialized classes

Assume that the JSON string format to be converted is:

{    "encoding":"UTF-8",    "plug-ins":["python","c++","ruby"],    "indent":{        "length":3,        "use_space":true    }}

Then write the corresponding serialized class. Pay attention to the attribute added to the following class:

[DataContract(Namespace = "json")]        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 = "json")]        class Indent        {            [DataMember(Order = 0)]            public int length { get; set; }            [DataMember(Order = 1)]            public bool useSpace { get; set; }        }

 

3. convert an object to a JSON string

Use the writeobject method:

 

Config = new config () {encoding = "UTF-8", plugins = new string [] {"Python", "C ++", "C #"}, indent = new indent () {length = 8, usespace = false }}; datacontractjsonserializer serializer = new datacontractjsonserializer (typeof (config); memorystream 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); // The comments can be replaced by the following sentence, which is simpler than string datastring = encoding. utf8.getstring (stream. toarray (); stream. close (); console. writeline ("JSON string is:"); console. writeline (datastring );

 

4. convert a JSON string to an object

Use the readobject method:

MemoryStream stream2 = new MemoryStream(Encoding.UTF8.GetBytes(dataString));            DataContractJsonSerializer serializer2 = new DataContractJsonSerializer(typeof(Config));            Config config2 = serializer2.ReadObject(stream2) as Config;            stream2.Close();            Console.WriteLine("Encoding is: {0}", config2.encoding);            foreach (string plugin in config2.plugins)            {                Console.WriteLine("plugins is: {0}", plugin);            }            Console.WriteLine("indent.length is: {0}", config2.indent.length);            Console.WriteLine("indent.use_space is: {0}", config2.indent.useSpace);

5. output results: