ASP.NET JSON字符串与实体类的互转换

来源：互联网发布：淘宝客大牛编辑：程序博客网时间：2024/05/16 03:30

还是先封装一个类吧! 这个类网上都可以找到的!有个这个类，一切都将变得简单了，哈哈。

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Runtime.Serialization.Json;using System.ServiceModel.Web;///记得引用这个命名空间using System.IO;using System.Text;/// <summary>/// Summary description for JsonHelper/// </summary>public class JsonHelper{    public JsonHelper()    {        //        // TODO: Add constructor logic here        //    }    /// <summary>    /// 把对象序列化 JSON 字符串     /// </summary>    /// <typeparam name="T">对象类型</typeparam>    /// <param name="obj">对象实体</param>    /// <returns>JSON字符串</returns>    public static string GetJson<T>(T obj)    {        //记住 添加引用 System.ServiceModel.Web         /**         * 如果不添加上面的引用,System.Runtime.Serialization.Json; Json是出不来的哦         * */        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>    /// 把JSON字符串还原为对象    /// </summary>    /// <typeparam name="T">对象类型</typeparam>    /// <param name="szJson">JSON字符串</param>    /// <returns>对象实体</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);        }    }}

测试实体类：

public class TestData{    public TestData()    {    }    public int Id { get; set; }    public string Name { get; set; }    public string Sex { get; set; }}

测试页面：

<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server">    protected void Page_Load(object sender, EventArgs e)    {        string jsonStr = string.Empty;        List<TestData> tds = new List<TestData>();        //测试数据        for (int i = 1; i < 4; i++)        {            tds.Add(new TestData() { Id = i, Name = "jinho" + i, Sex = "male" });        }

        //把一个list转换为json字符串        jsonStr = JsonHelper.GetJson<List<TestData>>(tds);        Response.Write(jsonStr);        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "json", "getJson(" + jsonStr + ");", true);    }    </script><script type="text/javascript">    function getJson(jsonStr) {

        //使用eval函数        var json = eval(jsonStr);

        //因为上面为list集合        for (var i = 0; i < json.length; i++) {            alert(json[i].Id + "Name:" + json[i].Name);        }    }</script><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">    <title></title></head><body>    <form id="form1" runat="server">    <div>        </div>    </form></body></html>

：关于json字符串转换为实体请各位自己测试吧！只要有上面那个JsonHelper 类，一切都好办！

验证工具：http://json2csharp.com/

转自：http://blog.csdn.net/wisdonlz/article/details/5815643