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ASP.NET的实时天气及24小时天气预报(C#) 修改其中的url获得其他城市的天气情况 如广州为： http://weather.yahoo.com/forecast/CHXX0037_c.html 注意仅适用于获得yahoo上的天气预报
GetWeather.aspx -----------------------------------
GetWeather
Weather
24小时天气
getWeather.aspx.cs ---------------------------------------
using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.Net; using System.IO;
namespace test {
public class GetWeather : System.Web.UI.Page { protected System.Web.UI.WebControls.Label lblWeather; protected System.Web.UI.WebControls.Label Weather2; protected System.Web.UI.WebControls.Button btnGet2; protected System.Web.UI.WebControls.Button btnGet; private void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the page here }
#region Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent(); base.OnInit(e); } /// /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// private void InitializeComponent() { this.btnGet.Click += new System.EventHandler(this.btnGet_Click); this.btnGet2.Click += new System.EventHandler(this.btnGet2_Click); this.Load += new System.EventHandler(this.Page_Load);
} #endregion
private void btnGet_Click(object sender, System.EventArgs e) {
WebRequest wreq=WebRequest.Create("http://weather.yahoo.com/forecast/CHXX0037_c.html"); HttpWebResponse wresp=(HttpWebResponse)wreq.GetResponse(); string HTML =""; Stream s=wresp.GetResponseStream(); StreamReader objReader = new StreamReader(s);
string sLine = "; int i = 0;
while (sLine!=null) { i++; sLine = objReader.ReadLine(); if (sLine!=null) HTML += sLine; } String temp= "; int start,stop; start = HTML.IndexOf("",0,HTML.Length);
stop = HTML.IndexOf("",0,HTML.Length);
temp = HTML.Substring(start, stop - start); start = temp.IndexOf(""); stop = temp.IndexOf(""); string degree = temp.Substring(start+3,stop - start -3);
start = temp.IndexOf("