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[ASP.net教程]C#中JSON序列化和反序列化


json序列化和反序列化帮助类:

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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Runtime.Serialization;using System.Runtime.Serialization.Json;using System.IO;using System.Text.RegularExpressions;using System.Web.Script.Serialization;namespace HelpClass.TypeHelp{  /// <summary>  /// 在VS中需要添加引用System.Web.Script.Serialization的时候,请先引用System.Web.Extensions  /// </summary>  public class JsonHelp  {    /// <summary>    /// json序列化(非二进制方式)    /// </summary>    /// <typeparam name="T"></typeparam>    /// <param name="t"></param>    /// <returns></returns>    public static string JsonSerializer<T>(T t)    {      JavaScriptSerializer jsonSerialize = new JavaScriptSerializer();      return jsonSerialize.Serialize(t);    }    /// <summary>    /// json反序列化(非二进制方式)    /// </summary>    /// <typeparam name="T"></typeparam>    /// <param name="jsonString"></param>    /// <returns></returns>    public static T JsonDeserialize<T>(string jsonString)    {      JavaScriptSerializer jsonSerialize = new JavaScriptSerializer();      return (T)jsonSerialize.Deserialize<T>(jsonString);    }    /// <summary>    /// JSON序列化(二进制方式,实体类使用[Serializable])    /// </summary>    /// <typeparam name="T"></typeparam>    /// <param name="t"></param>    /// <returns></returns>    public static string JsonSerializerIO<T>(T t)    {      DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));      using (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(二进制方法,实体类使用[Serializable])    /// </summary>    /// <typeparam name="T"></typeparam>    /// <param name="jsonString"></param>    /// <returns></returns>    public static T JsonDeserializeIO<T>(string jsonString)    {      DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));      using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)))      {        T obj = (T)ser.ReadObject(ms);        return obj;      }    }  }}
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上面这个类使用了两中json序列化形式。

1、  使用System.Web.Script.Serialization进行序列化和反序列化,不过在VS中需要添加引用System.Web.Script.Serialization的时候,请先引用System.Web.Extensions。

使用方法:       

(1)需要序列化和反序列化的类

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public class ddd{    public string d1 { get; set; }    public string d2 { get; set; }    public string d3 { get; set; }}
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(2)序列化和反序列化

序列化单个类为json:

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ddd a = new ddd { d1 = "1", d2 = "2", d3 = "3" };string stra = HelpClass.TypeHelp.JsonHelp.JsonSerializer<ddd>(a);ddd dd2 = HelpClass.TypeHelp.JsonHelp.JsonDeserialize<ddd>(stra);序列化类序列为json数组:ddd a = new ddd { d1 = "1", d2 = "2", d3 = "3" };ddd b = new ddd { d1 = "11", d2 = "12", d3 = "13" };ddd c = new ddd { d1 = "21", d2 = "22", d3 = "23" };List<ddd> abc = new List<ddd>();abc.Add(a);abc.Add(b);abc.Add(c);string strabc = HelpClass.TypeHelp.JsonHelp.JsonSerializer<List<ddd>>(abc);List<ddd> ddabc =HelpClass.TypeHelp.JsonHelp.JsonDeserialize<List<ddd>>(strabc);
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2、  使用System.Runtime.Serialization.Json命名空间下的DataContractJsonSerializer类进行json的序列化和反序列化,该方法使用的二进制的方式来序列化和反序列化,使用该类方法时需要在对应的实体类中有相应的标识(如:[DataContract] [DataMember(Name = "")])在下面的调用时有相关说明。

 

使用方法:       

(1)需要序列化和反序列化的类

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[DataContract]public class ddd{      [DataMember(Name = "d1")]      public string d1 { get; set; }      [DataMember(Name = "d2")]      public string d2 { get; set; }      [DataMember(Name = "d3")]      public string d3 { get; set; } }
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(2)序列化和反序列化

序列化单个类为json:

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ddd a = new ddd { d1 = "1", d2 = "2", d3 = "3" };string stra = HelpClass.TypeHelp.JsonHelp.JsonSerializer<ddd>(a);ddd dd2 = HelpClass.TypeHelp.JsonHelp.JsonDeserialize<ddd>(stra);序列化类序列为json数组:ddd a = new ddd { d1 = "1", d2 = "2", d3 = "3" };ddd b = new ddd { d1 = "11", d2 = "12", d3 = "13" };ddd c = new ddd { d1 = "21", d2 = "22", d3 = "23" };List<ddd> abc = new List<ddd>();abc.Add(a);abc.Add(b);abc.Add(c);string strabc = HelpClass.TypeHelp.JsonHelp.JsonSerializer<List<ddd>>(abc);List<ddd> ddabc =HelpClass.TypeHelp.JsonHelp.JsonDeserialize<List<ddd>>(strabc);
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看完了上面的这些或许你已经对JSON的序列化和反序列化有了一定的了解,今天就写到这里,下次就总结一下