C# 獲取接口數據（xml格式）轉爲json格式

流程：XmlDocument-->XmlNode -->XmlNodeList

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Xml;

using System.Net;

using System.IO;

namespace juheWeather

{

    public partial class BJweather : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            //string callback = Request.QueryString["callback"];

            Response.Write(getWeather());

            Response.End();

        }

        public string getWeather()

        {

            string weatherXML = GetRequestData("http://flash.weather.com.cn/wmaps/xml/beijing.xml");

            XmlDocument xml = new XmlDocument();（深入研究獲取xml各種位置的信息，請百度：XmlDocument，還可以參見readXML實現程序）

            xml.LoadXml(weatherXML);

            XmlNode root = xml.SelectSingleNode("beijing");

            XmlNodeList childlist = root.ChildNodes;

            string strResult = "[";

            for (int i = 0; i < childlist.Count; i++)

            {

                strResult += "{'cityname':'" + childlist[i].Attributes["cityname"].Value + "',";

                strResult += "'state1':'" + childlist[i].Attributes["state1"].Value + "',";

                strResult += "'state2':'" + childlist[i].Attributes["state2"].Value + "',";

                strResult += "'stateDetailed':'" + childlist[i].Attributes["stateDetailed"].Value + "',";

                strResult += "'tem1':'" + childlist[i].Attributes["tem1"].Value + "',";

                strResult += "'tem2':'" + childlist[i].Attributes["tem2"].Value + "',";

                strResult += "'temNow':'" + childlist[i].Attributes["temNow"].Value + "',";

                strResult += "'windState':'" + childlist[i].Attributes["windState"].Value + "',";

                strResult += "'windDir':'" + childlist[i].Attributes["windDir"].Value + "',";

                strResult += "'windPower':'" + childlist[i].Attributes["windPower"].Value + "',"; 

                strResult += "'humidity':'" + childlist[i].Attributes["humidity"].Value + "',";

                strResult += "'time':'" + childlist[i].Attributes["time"].Value + "',";

                strResult += "'url':'" + childlist[i].Attributes["url"].Value + "'},";

            }

            strResult = strResult.Substring(0, strResult.Length - 1);

            return strResult + "]";

        }

        public static string GetRequestData(string sUrl)

        {

            //使用HttpWebRequest類的Create方法創建一個請求到uri的對象。

            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(sUrl);

            //指定請求的方式爲Get方式

            request.Method = WebRequestMethods.Http.Get;

            //獲取該請求所響應回來的資源，並強轉爲HttpWebResponse響應對象

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            //獲取該響應對象的可讀流

            StreamReader reader = new StreamReader(response.GetResponseStream());

            //將流文本讀取完成並賦值給str

            string str = reader.ReadToEnd();

            //關閉響應

            response.Close();

            return str;

        }

    }

}