JsonHellper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Runtime.Serialization.Json;
using System.IO;
using System.Text;

/// <summary>
/// JSON序列化和反序列化辅助类
/// </summary>
public class JsonHelper
{
    /// <summary>
    /// JSON序列化
    /// </summary>
    public static string JsonSerializer<T>(T t)
    {
        DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
        MemoryStream ms = new MemoryStream();
        ser.WriteObject(ms, t);
        string jsonString = Encoding.UTF8.GetString(ms.ToArray());
        ms.Close();
        return jsonString;
    }

    /// <summary>
    /// JSON反序列化
    /// </summary>
    public static T JsonDeserialize<T>(string jsonString)
    {
        DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
        MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
        T obj = (T)ser.ReadObject(ms);
        return obj;
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WEBTEST
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Person pp = new Person("lizhijie", 12);
            string aaa = JsonHelper.JsonSerializer<Person>(pp);
            Person pp2 = JsonHelper.JsonDeserialize<Person>(aaa);

            Response.Write(aaa + "<br/>");
            Response.Write(pp2.Age.ToString() + "<br/>");
            Response.Write(pp2.Name);
        }
    }

    public class Person
    {
        public Person()
        { }
        public Person(string name, int age)
        {
            this.Name = name;
            this.Age = age;
        }
        public string Name { get; set; }
        public int Age { get; set; }
    }

}

 可以使用DataContractJsonSerializer类将类型实例序列化为JSON字符串，并将JSON字符串反序列化为类型实例。DataContractJsonSerializer在System.Runtime.Serialization.Json命名空间下，.NET Framework 3.5包含在System.ServiceModel.Web.dll中，需要添加对其的引用；.NET Framework 4在System.Runtime.Serialization中。