using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;//先在项目中添加System.Web.Extensions引用.net 3.5using System.Web.Script.Serialization;using System.Collections.Specialized;using System.Collections.Generic;using System.Text;using System.Net;namespace JSONFromCS{ public partial class WebForm3 : System.Web.UI.Page { /// <summary> /// 将json数据反序列化为Dictionary///http://www.weather.com.cn/static/html/legend.shtml 天气图示 /// </summary> /// <param name="jsonData">json数据</param> /// <returns></returns> PRivate Dictionary<string, object> JsonToDictionary(string jsonData) { //实例化javaScriptSerializer类的新实例 JavascriptSerializer jss = new JavaScriptSerializer(); try { //将指定的 JSON 字符串转换为 Dictionary<string, object> 类型的对象 return jss.Deserialize<Dictionary<string, object>>(jsonData); } catch (Exception ex) { throw new Exception(ex.Message); } } /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void Page_Load(object sender, EventArgs e) { string url = "http://www.weather.com.cn/data/cityinfo/101280601.html"; WebClient wc = new WebClient(); wc.Encoding = System.Text.Encoding.UTF8;//定义对象语言 string json = wc.DownloadString(url); //string json = "{/"weatherinfo/":{/"city/":/"深圳/",/"cityid/":/"101280601/",/"temp/":/"32/",/"WD/":/"西南风/",/"WS/":/"4级/",/"SD/":/"68%/",/"WSE/":/"4/",/"time/":/"16:40/",/"isRadar/":/"1/",/"Radar/":/"JC_RADAR_AZ9755_JB/"}}"; StringBuilder strb = new StringBuilder(); Dictionary<string, object> dic = JsonToDictionary(json);//将Json数据转成dictionary格式 Dictionary<string, object> dataSet = (Dictionary<string, object>)dic["weatherinfo"]; //使用KeyValuePair遍历数据 foreach (KeyValuePair<string, object> item in dataSet) { strb.Append(item.Key + ":" + item.Value + "<br/>");//显示到界面 } Response.Write(strb.ToString()); } }}
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