1.JSON的序列化和反序列化
Newtonsoft.Json dll 下载地址http://json.codeplex.com/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Newtonsoft.Json;
namespace PlayJSON
{
class Program
{
static void Main(string[] args)
{
List<StuInfo> list = new List<StuInfo>() { new StuInfo{StuName="张三",StuSex="男",StuAge=11},
new StuInfo{StuName="李四",StuSex="男",StuAge=32},
new StuInfo{StuName="王翠花",StuSex="女",StuAge=64}
};
string jsonStr = JavaScriptConvert.SerializeObject(list); //将对象转换成json存储
Console.WriteLine("JSON字符串"+jsonStr);
Console.ReadLine();
List<StuInfo> newList = new List<StuInfo>();
newList = (List<StuInfo>)JavaScriptConvert.DeserializeObject(jsonStr,typeof(List<StuInfo>)); //反序列化
//StuInfo s = new StuInfo() { StuName = "阿龙", StuSex = "男", StuAge = 33 };
//string sigleJSON = JavaScriptConvert.SerializeObject(s);
//StuInfo newS = (StuInfo)JavaScriptConvert.DeserializeObject(sigleJSON);
//Console.WriteLine("姓名：" + newS.StuName + "---性别：" + newS.StuSex + "--年龄：" + newS.StuAge + "
");
foreach (StuInfo item in newList)
{
Console.WriteLine("姓名：" + item.StuName + "---性别：" + item.StuSex + "--年龄：" + item.StuAge + "
");
}
Console.ReadLine();
}
}
public class StuInfo
{
public string StuName { set; get; }
public string StuSex { set; get; }
public int StuAge { set; get; }
}
}
2.在web中
/// <summary>
/// Handler1 的摘要说明
/// </summary>
public class Handler1 : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
List<StuInfo> list = new List<StuInfo>() { new StuInfo{StuName="张三",StuSex="男",StuAge=11},
new StuInfo{StuName="李四",StuSex="男",StuAge=32},
new StuInfo{StuName="王翠花",StuSex="女",StuAge=64}
};
string jsonStr = JavaScriptConvert.SerializeObject(list);
context.Response.Write(jsonStr);
context.Response.End();
}
public bool IsReusable
{
get
{
return false;
}
}
}
public class StuInfo
{
public string StuName { set; get; }
public string StuSex { set; get; }
public int StuAge { set; get; }
}
前台页面上的调用：这里采用jquery 的ajax请求
<head runat="server"> <title>JSON</title> <script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script> <script type="text/javascript"> $(function () { $("#btnOK").click(function () { $.ajax({ type: "JSON", url: "Handler1.ashx", data: null, success: function (msg) { var con=""; for (var i = 0; i < msg.length; i++) { con += "姓名：" + msg[i].StuName + "--性别：" + msg[i].StuSex + "--" + "--年龄：" + msg[i].StuAge+"<br/>"; } $("#divContent").html("长度：" + msg.length + "--具体内容：<br/>" + con); } }); }); }); </script> </head> <body> <form id="form1" runat="server"> <div> <input type="button" id="btnOK" value="点我获得JSON数据" /> <div id="divContent"></div> </div> </form> </body>
现在经常会用到json,因此经常会需要对其进行序列化和反序列化。，.NET Framewok 3.5也提供了JSON对象序列化和反序列化的类，这就是System.Runtime.Serialization.Json 命名空间下的 DataContractJsonSerializer 类。利用这个类，可以实现JSON对象的序列化和反序列化。
现在我提供一个类JSON对象序列化和反序列化的类供参考用：
/// <summary>
/// JSON帮助类。用于将对象转换为Json格式的字符串，或者将Json的字符串转化为对象。
/// </summary>
public static class JsonHelper
{
/// <summary>
/// 将对象转化为Json字符串
/// </summary>
/// <typeparam name="T">源类型</typeparam>
/// <param name="obj">源类型实例</param>
/// <returns>Json字符串</returns>
public static string GetJsonFromObj<T>(T obj)
{
DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(obj.GetType());
using (MemoryStream ms = new MemoryStream())
{
jsonSerializer.WriteObject(ms, obj);
return Encoding.UTF8.GetString(ms.ToArray());
}
}
/// <summary>
/// 将Json字符串转化为对象
/// </summary>
/// <typeparam name="T">目标类型</typeparam>
/// <param name="strJson">Json字符串</param>
/// <returns>目标类型的一个实例</returns>
public static T GetObjFromJson<T>(string strJson)
{
T obj = Activator.CreateInstance<T>();
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(strJson)))
{
DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(obj.GetType());
return (T)jsonSerializer.ReadObject(ms);
}
}
/// <summary>
/// 将DataTable转换为JSON字符串
/// </summary>
/// <param name="dt">数据表</param>
/// <returns>JSON字符串</returns>
public static string GetJsonFromDataTable(DataTable dt)
{
StringBuilder JsonString = new StringBuilder();
if (dt != null && dt.Rows.Count > 0)
{
JsonString.Append("{ ");
JsonString.Append(""TableInfo":[ ");
for (int i = 0; i < dt.Rows.Count; i++)
{
JsonString.Append("{ ");
for (int j = 0; j < dt.Columns.Count; j++)
{
if (j < dt.Columns.Count - 1)
{
JsonString.Append(""" + dt.Columns[j].ColumnName.ToString() + "":" + """ + dt.Rows[i][j].ToString() + "",");
}
else if (j == dt.Columns.Count - 1)
{
JsonString.Append(""" + dt.Columns[j].ColumnName.ToString() + "":" + """ + dt.Rows[i][j].ToString() + """);
}
}
if (i == dt.Rows.Count - 1)
{
JsonString.Append("} ");
}
else
{
JsonString.Append("}, ");
}
}
JsonString.Append("]}");
return JsonString.ToString();
}
else
{
return null;
}
}
/// <summary>
/// 将对象转化为Json字符串
/// </summary>
/// <param name="obj">源对象</param>
/// <returns>json数据</returns>
public static string ObjToJson(this object obj)
{
JavaScriptSerializer serialize = new JavaScriptSerializer();
return serialize.Serialize(obj);
}
/// <summary>
/// 将Json字符串转化为对象
/// </summary>
/// <param name="strJson">Json字符串</param>
/// <returns>目标对象</returns>
public static T JsonToObj<T>(string strJson)
{
JavaScriptSerializer serialize = new JavaScriptSerializer();
return serialize.Deserialize<T>(strJson);
}
/// <summary>
/// 将对象转化为Json字符串(控制深度 )
/// </summary>
/// <param name="obj">源对象</param>
/// <param name="recursionDepth">深度</param>
/// <returns>json数据</returns>
public static string ObjToJson(this object obj, int recursionDepth)
{
JavaScriptSerializer serialize = new JavaScriptSerializer();
serialize.RecursionLimit = recursionDepth;
return serialize.Serialize(obj);
}
/// <summary>
/// 将Json字符串转化为对象(控制深度 )
/// </summary>
/// <param name="strJson">Json字符串</param>
/// <param name="recursionDepth">深度</param>
/// <returns>目标对象</returns>
public static T JsonToObj<T>(string strJson, int recursionDepth)
{
JavaScriptSerializer serialize = new JavaScriptSerializer();
serialize.RecursionLimit = recursionDepth;
return serialize.Deserialize<T>(strJson);
}
/// <summary>
/// 将DataTable转换为JSON字符串
/// </summary>
/// <param name="dt">DataTable</param>
/// <returns>json数据</returns>
public static string DataTableToJson(DataTable dt)
{
Dictionary<string, object> dic = new Dictionary<string, object>();
int index = 0;
foreach (DataRow dr in dt.Rows)
{
Dictionary<string, object> result = new Dictionary<string, object>();
foreach (DataColumn dc in dt.Columns)
{
result.Add(dc.ColumnName, dr[dc].ToString());
}
dic.Add(index.ToString(), result);
index++;
}
return ObjToJson(dic);
}
}
使用如下：
public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { //反序列化成对象 String strJson = "{"Name":"Test123","Url":"http://www.126.com/"}"; Person p1 = JsonHelper.GetObjFromJson<Person>(strJson); Response.Write("<li>" + p1.Name + " " + p1.Url); Person p2 = JsonHelper.JsonToObj<Person>(strJson); Response.Write("<li>" + p2.Name + " " + p2.Url); } protected void Button2_Click(object sender, EventArgs e) { //对象的序列化 String JSONString = string.Empty; Person p1 = new Person(); p1.Name = "Test123'" "; p1.Url = "http://www.126.com/"; JSONString = JsonHelper.GetJsonFromObj<Person>(p1); Response.Write("<li>" + JSONString); JSONString = JsonHelper.ObjToJson(p1); Response.Write("<li>" + JSONString); } } /// <summary> /// 类对象需要标记为DataContractAttribute /// </summary> [DataContractAttribute] class Person { //成员需要标记为 DataMember [DataMember] public string Name { set; get; } [DataMember] public string Url { set; get; } }
补充：
在C#中可以对JSON进行序列化与反序列化，十分的方便。代码如下：
首先引入命名空间：using System.Web.Script.Serialization;
再定义一个类，如下：
public class jsonClass { public string id; public string name; public string pId; public string isParent; public string open; public string senable; public string CHECKED; public string chkDisabled; }
将一个JSON字符串转换成jsonClass类实例，如下：
JavaScriptSerializer serializer = new JavaScriptSerializer(); List<jsonClass> jsonClassList = serializer.Deserialize<List<jsonClass>>(jsonString);
将List<jsonClass>转换成json
string resultString = serializer.Serialize(jsonClassList);
转自：http://blog.csdn.net/hellojimmy520/article/details/7377265