在C#中，Json的序列化和反序列化的几种方式总结

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.Serialization;

namespace JsonSerializerAndDeSerializer
{
    [DataContract]
   public class Student
    {
        [DataMember]
       public int ID { get; set; }

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

        [DataMember]
       public int Age { get; set; }

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

//----------------------------------------------------------------------------------------------
//使用DataContractJsonSerializer方式需要引入的命名空间，在System.Runtime.Serialization.dll.中
using System.Runtime.Serialization.Json;
//--------------------------------------------------------------------------------------------

#region 1.DataContractJsonSerializer方式序列化和反序列化
            Student stu = new Student()
             {
                 ID = 1,
                 Name = "曹操",
                 Sex = "男",
                 Age = 1000
             };
            //序列化
            DataContractJsonSerializer js = new DataContractJsonSerializer(typeof(Student));
            MemoryStream msObj = new MemoryStream();
            //将序列化之后的Json格式数据写入流中
            js.WriteObject(msObj, stu);
            msObj.Position = 0;
            //从0这个位置开始读取流中的数据
            StreamReader sr = new StreamReader(msObj, Encoding.UTF8);
            string json = sr.ReadToEnd();
            sr.Close();
            msObj.Close();
            Console.WriteLine(json);


            //反序列化
            string toDes = json;
            //string to = "{\"ID\":\"1\",\"Name\":\"曹操\",\"Sex\":\"男\",\"Age\":\"1230\"}";
            using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(toDes)))
            {
                DataContractJsonSerializer deseralizer = new DataContractJsonSerializer(typeof(Student));
                Student model = (Student)deseralizer.ReadObject(ms);// //反序列化ReadObject
                Console.WriteLine("ID=" + model.ID);
                Console.WriteLine("Name=" + model.Name);
                Console.WriteLine("Age=" + model.Age);
                Console.WriteLine("Sex=" + model.Sex);
            }
            Console.ReadKey(); 
            #endregion

//-----------------------------------------------------------------------------------------
//使用JavaScriptSerializer方式需要引入的命名空间，这个在程序集System.Web.Extensions.dll.中
using System.Web.Script.Serialization;
//----------------------------------------------------------------------------------------

#region 2.JavaScriptSerializer方式实现序列化和反序列化
            Student stu = new Student()
               {
                   ID = 1,
                   Name = "关羽",
                   Age = 2000,
                   Sex = "男"
               };

            JavaScriptSerializer js = new JavaScriptSerializer();
            string jsonData = js.Serialize(stu);//序列化
            Console.WriteLine(jsonData);


            ////反序列化方式一：
            string desJson = jsonData;
            //Student model = js.Deserialize<Student>(desJson);// //反序列化
            //string message = string.Format("ID={0},Name={1},Age={2},Sex={3}", model.ID, model.Name, model.Age, model.Sex);
            //Console.WriteLine(message);
            //Console.ReadKey(); 


            ////反序列化方式2
            dynamic modelDy = js.Deserialize<dynamic>(desJson); //反序列化
            string messageDy = string.Format("动态的反序列化,ID={0},Name={1},Age={2},Sex={3}",
                modelDy["ID"], modelDy["Name"], modelDy["Age"], modelDy["Sex"]);//这里要使用索引取值，不能使用对象.属性
            Console.WriteLine(messageDy);
            Console.ReadKey(); 
            #endregion

Json.NET is a third party library which helps conversion between JSON text and .NET object using the JsonSerializer. The JsonSerializer converts .NET objects into their JSON equivalent text and back again by mapping the .NET object property names to the JSON property names. It is open source software and free for commercial purposes.

 

The following are some awesome【极好的】 features,

• Flexible JSON serializer for converting between .NET objects and JSON.
• LINQ to JSON for manually reading and writing JSON.
• High performance, faster than .NET‘s built-in【内嵌】 JSON serializers.
• Easy to read JSON.
• Convert JSON to and from XML.
• Supports .NET 2, .NET 3.5, .NET 4, Silverlight and Windows Phone. 

Let’s start learning how to install and implement:

 

In Visual Studio, go to Tools Menu -> Choose Library Package Manger -> Package Manager Console. It opens a command window where we need to put the following command to install Newtonsoft.Json.

 

Install-Package Newtonsoft.Json

OR

In Visual Studio, Tools menu -> Manage Nuget Package Manger Solution and type “JSON.NET” to search it online. Here‘s the figure,

//使用Json.NET类库需要引入的命名空间
//-----------------------------------------------------------------------------
using Newtonsoft.Json;
//-------------------------------------------------------------------------

#region 3.Json.NET序列化
            List<Student> lstStuModel = new List<Student>() 
            {
            
            new Student(){ID=1,Name="张飞",Age=250,Sex="男"},
            new Student(){ID=2,Name="潘金莲",Age=300,Sex="女"}
            };

            //Json.NET序列化
            string jsonData = JsonConvert.SerializeObject(lstStuModel);

            Console.WriteLine(jsonData);
            Console.ReadKey();


            //Json.NET反序列化
            string json = @"{ ‘Name‘:‘C#‘,‘Age‘:‘3000‘,‘ID‘:‘1‘,‘Sex‘:‘女‘}";
            Student descJsonStu = JsonConvert.DeserializeObject<Student>(json);//反序列化
            Console.WriteLine(string.Format("反序列化： ID={0},Name={1},Sex={2},Sex={3}", descJsonStu.ID, descJsonStu.Name, descJsonStu.Age, descJsonStu.Sex));
            Console.ReadKey(); 
            #endregion