关于JSON的更多介绍,请各位自行google了解!如果要我写的话,我也是去Google后copy!嘿嘿,一直以来很想学习json,大量的找资料和写demo,总算有点了解! 切入正题!
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。
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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> /// </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:
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public class TestData { public TestData() { } public int Id { get ; set ; } public string Name { get ; set ; } public string Sex { get ; set ; } } |
测试页面:
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<%@ 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> < 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!
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。