[转]JSON序列化与反序列化

使用微软自带的Json库

方法一：引入System.Web.Script.Serialization命名空间使用 JavaScriptSerializer类实现简单的序列化

序列化类：Personnel

public class Personnel
        {
            public int Id { get; set; }
            public string Name { get; set; }
        }

执行序列化反序列化：

        protected void Page_Load(object sender, EventArgs e)
        {
            Personnel personnel = new Personnel();
            personnel.Id = 1;
            personnel.Name = "小白";

JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
            //执行序列化
            string r1 = jsonSerializer.Serialize(personnel);
            
            //执行反序列化
            Personnel _Personnel = jsonSerializer.Deserialize<Personnel>(r1);
         }

protected void Page_Load(object sender, EventArgs e)
        {
            Personnel personnel = new Personnel();
            personnel.Id = 1;
            personnel.Name = "小白";

JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
            //执行序列化
            string r1 = jsonSerializer.Serialize(personnel);
            
            //执行反序列化
            Personnel _Personnel = jsonSerializer.Deserialize<Personnel>(r1);
         }

r1输出结果：{"Id":1,"Name":"小白"}

可以使用 ScriptIgnore属性标记不序列化公共属性或公共字段。

public class Personnel
        {
            [ScriptIgnore]
            public int Id { get; set; }
            public string Name { get; set; }
        }

r1输出结果：{"Name":"小白"}

方法二：引入 System.Runtime.Serialization.Json命名空间使用 DataContractJsonSerializer类实现序列化

序列化类：People

public class People
        {
            public int Id { get; set; }
            public string Name { get; set; }
        }

执行序列化反序列化

protected void Page_Load(object sender, EventArgs e)
        {
            People people = new People();
            people.Id = 1;
            people.Name = "小白";

DataContractJsonSerializer json = new DataContractJsonSerializer(people.GetType());
            string szJson = "";
            //序列化
            using (MemoryStream stream = new MemoryStream())
            {
                json.WriteObject(stream, people);
                szJson = Encoding.UTF8.GetString(stream.ToArray());
            }
            //反序列化
            using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(szJson)))
            {
                DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(People));
                People _people = (People)serializer.ReadObject(ms);
            }

}

szJson输出结果：{"Id":1,"Name":"小白"}

可以使用IgnoreDataMember:指定该成员不是数据协定的一部分且没有进行序列化，DataMember:定义序列化属性参数，使用DataMember属性标记字段必须使用DataContract标记类 否则DataMember标记不起作用。

[DataContract]
        public class People
        {
            [DataMember(Name = "id")]
            public int Id { get; set; }
            [IgnoreDataMember]
            public string Name { get; set; }
        }

输出结果: {"id":1}

附 ：泛型json序列化类

namespace Communication
{
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Runtime.Serialization.Json;
    using System.Text;

    /// <summary>
    /// Serialize and deserialize JSON object.
    /// </summary>
    internal class JsonHelper
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="JsonHelper" /> class.
        /// </summary>
        public JsonHelper()
        {
        }

        /// <summary>
        /// serialize object to JSON object.
        /// </summary>
        /// <typeparam name="T">the type of the serializing target.</typeparam>
        /// <param name="obj">the instance of the serializing target.</param>
        /// <returns>JSON string.</returns>
        public static string GetJson<T>(T obj)
        {
            DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(T));
            using (MemoryStream ms = new MemoryStream())
            {
                json.WriteObject(ms, obj);
                string szjson = Encoding.UTF8.GetString(ms.ToArray());
                return szjson;
            }
        }

        /// <summary>
        /// de-serialize object to JSON object.
        /// </summary>
        /// <typeparam name="T">the type of the de-serializing target.</typeparam>
        /// <param name="szjson">the JSON string</param>
        /// <returns>the instance of the de-serializing target.</returns>
        public static T ParseFormJson<T>(string szjson)
        {
            T obj = Activator.CreateInstance<T>();
            using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(szjson)))
            {
                DataContractJsonSerializer dcj = new DataContractJsonSerializer(typeof(T));
                return (T)dcj.ReadObject(ms);
            }
        }
    }
}

还可以使用Json.net进行Json序列化

这里下载:http://www.newtonsoft.com/products/json/