csharp:qq weather

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;
using System.Net;
using System.Net.Security;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
using System.Net.Cache;

namespace sitemapdemo
{
    /// <summary>
    /// 2011-06-16 塗聚文
    /// </summary>
    public partial class QQweather : System.Web.UI.Page
    {

        public string selectcity = "1";
        string strUrl = "http://weather.qq.com/inc/ss1.htm";
        string old = @"<select id=""obSelect"" onchange=""getredirect(this.value)"">";
        string old1 = @"<option value=""1"">香港</option><option value=""2"">澳门</option><option value=""17"">哈尔滨</option><option value=""28"">乌鲁木齐</option><option value=""56"">西宁</option><option value=""57"">兰州</option><option value=""69"">呼和浩特</option><option value=""78"">银川</option><option value=""82"">石家庄</option><option value=""84"">太原</option><option value=""103"">长春</option><option value=""115"">沈阳</option><option selected value=""125"">北京</option><option value=""127"">天津</option><option value=""140"">济南</option><option value=""150"">拉萨</option><option value=""166"">成都</option><option value=""179"">昆明</option><option value=""186"">西安</option><option value=""189"">郑州</option><option value=""211"">武汉</option><option value=""212"">重庆</option><option value=""218"">长沙</option><option value=""227"">贵阳</option><option value=""232"">桂林</option><option value=""244"">南京</option><option value=""248"">合肥</option><option value=""252"">上海</option><option value=""255"">杭州</option><option value=""264"">南昌</option><option value=""276"">福州</option><option value=""280"">台北</option><option value=""287"">厦门</option><option value=""292"">广州</option><option value=""295"">南宁</option><option value=""296"">深圳</option><option value=""303"">海口</option>";
        string old2 = @"</select>";
        string old3 = @"市";
        string old4 = @"<img src=""/images/r_b.gif"" width=""96"" height=""21"">";
        string strWeather = string.Empty;
        /// <summary>
        ///
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Load(object sender, EventArgs e)
        {
            //ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
            //HttpWebRequest req = (HttpWebRequest)WebRequest.CreateDefault(new Uri("http://intranet.lukfook.com.hk/luk_intranet/QQweather.aspx"));//https://intranet.lukfook.com.hk/luk_intranet/QQweather.aspx
            //req.Method = "GET";
            //HttpWebResponse res = (HttpWebResponse)req.GetResponse();
            //selectcity = DropDownList1.SelectedValue.ToString();
            if (!IsPostBack)
            {

                this.DropDownList1.DataSource = CreateDataSource();
                DropDownList1.DataTextField = "WeatherTextField";
                DropDownList1.DataValueField = "WeatherValueField";

                // Bind the data to the control.
                DropDownList1.DataBind();

                // Set the default selected item, if desired.
                DropDownList1.SelectedIndex = 0;
                selectcity = @"1";
                strUrl = "http://weather.qq.com/inc/ss1.htm";

                strWeather = getHttpData(strUrl);
                strWeather = strWeather.Replace(old, "");
                strWeather = strWeather.Replace(old1, "");
                strWeather = strWeather.Replace(old2, "");
                strWeather = strWeather.Replace(old3, "");
                strWeather = strWeather.Replace(old4, "");
                geovindu.InnerHtml = strWeather; //getHttpData(strUrl);
                //Response.Write(s);

            }

            /*
             * <select id="obSelect" onchange="getredirect(this.value)">

<option value="1">香港</option><option value="2">澳门</option><option value="17">哈尔滨</option><option value="28">乌鲁木齐</option><option value="56">西宁</option><option value="57">兰州</option><option value="69">呼和浩特</option><option value="78">银川</option><option value="82">石家庄</option><option value="84">太原</option><option value="103">长春</option><option value="115">沈阳</option><option selected value="125">北京</option><option value="127">天津</option><option value="140">济南</option><option value="150">拉萨</option><option value="166">成都</option><option value="179">昆明</option><option value="186">西安</option><option value="189">郑州</option><option value="211">武汉</option><option value="212">重庆</option><option value="218">长沙</option><option value="227">贵阳</option><option value="232">桂林</option><option value="244">南京</option><option value="248">合肥</option><option value="252">上海</option><option value="255">杭州</option><option value="264">南昌</option><option value="276">福州</option><option value="280">台北</option><option value="287">厦门</option><option value="292">广州</option><option value="295">南宁</option><option value="296">深圳</option><option value="303">海口</option>

             */
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Button1_Click(object sender, EventArgs e)
        {
            //ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
            //HttpWebRequest req = (HttpWebRequest)WebRequest.CreateDefault(new Uri("http://intranet.lukfook.com.hk/luk_intranet/QQweather.aspx"));
            //req.Method = "GET";
            //HttpWebResponse res = (HttpWebResponse)req.GetResponse();
            selectcity = DropDownList1.SelectedValue.ToString();
            strUrl = "http://weather.qq.com/inc/ss"+selectcity+".htm";
            strWeather = getHttpData(strUrl);
            strWeather = strWeather.Replace(old, "");
            strWeather = strWeather.Replace(old1, "");
            strWeather = strWeather.Replace(old2, "");
            strWeather = strWeather.Replace(old3, "");
            strWeather = strWeather.Replace(old4, "");
            geovindu.InnerHtml = strWeather; //getHttpData(strUrl);  

        }
        /// <summary>
        /// <%# selectcity%>
        /// </summary>
        /// <returns></returns>
        ICollection CreateDataSource()
        {

            DataTable dt = new DataTable();
            dt.Columns.Add(new DataColumn("WeatherTextField", typeof(String)));
            dt.Columns.Add(new DataColumn("WeatherValueField", typeof(String)));
            dt.Rows.Add(CreateRow("香港", "1", dt));
            dt.Rows.Add(CreateRow("澳門", "2", dt));
            dt.Rows.Add(CreateRow("哈爾濱", "17", dt));
            dt.Rows.Add(CreateRow("烏魯木齊", "28", dt));
            dt.Rows.Add(CreateRow("西寧", "56", dt));
            dt.Rows.Add(CreateRow("蘭州", "57", dt));
            dt.Rows.Add(CreateRow("呼和浩特", "69", dt));
            dt.Rows.Add(CreateRow("銀川", "78", dt));
            dt.Rows.Add(CreateRow("石家莊", "82", dt));
            dt.Rows.Add(CreateRow("太原", "84", dt));
            dt.Rows.Add(CreateRow("長春 ", "103", dt));
            dt.Rows.Add(CreateRow("瀋陽 ", "115", dt));
            dt.Rows.Add(CreateRow("北京 ", "125", dt));
            dt.Rows.Add(CreateRow("天津 ", "127", dt));
            dt.Rows.Add(CreateRow("濟南 ", "140", dt));
            dt.Rows.Add(CreateRow("拉薩 ", "150", dt));
            dt.Rows.Add(CreateRow("成都 ", "166", dt));
            dt.Rows.Add(CreateRow("昆明 ", "179", dt));
            dt.Rows.Add(CreateRow("西安 ", "186", dt));
            dt.Rows.Add(CreateRow("鄭州 ", "189", dt));
            dt.Rows.Add(CreateRow("武漢 ", "211", dt));
            dt.Rows.Add(CreateRow("重慶 ", "212", dt));
            dt.Rows.Add(CreateRow("長沙 ", "218", dt));
            dt.Rows.Add(CreateRow("貴陽 ", "227", dt));
            dt.Rows.Add(CreateRow("桂林 ", "232", dt));
            dt.Rows.Add(CreateRow("南京 ", "244", dt));
            dt.Rows.Add(CreateRow("合肥 ", "248", dt));
            dt.Rows.Add(CreateRow("上海 ", "252", dt));
            dt.Rows.Add(CreateRow("杭州 ", "255", dt));
            dt.Rows.Add(CreateRow("南昌 ", "264", dt));
            dt.Rows.Add(CreateRow("福州 ", "276", dt));
            dt.Rows.Add(CreateRow("臺北 ", "280", dt));
            dt.Rows.Add(CreateRow("廈門 ", "287", dt));
            dt.Rows.Add(CreateRow("廣州 ", "292", dt));
            dt.Rows.Add(CreateRow("南寧 ", "295", dt));
            dt.Rows.Add(CreateRow("深圳 ", "296", dt));
            dt.Rows.Add(CreateRow("海口 ", "303", dt));
            DataView dv = new DataView(dt);
            return dv;

        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="Text"></param>
        /// <param name="Value"></param>
        /// <param name="dt"></param>
        /// <returns></returns>
        DataRow CreateRow(String Text, String Value, DataTable dt)
        {
            DataRow dr = dt.NewRow();
            dr[0] = Text;
            dr[1] = Value;
            return dr;

        }
        public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            //直接确认，否则打不开
            return true;
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public string getHttpData(string url)
        {
            try
            {
                //1
                WebClient myWebClient = new WebClient();
                //WebClient.CachePolicy = new System.Net.Cache.RequestCachePolicy(System.Net.Cache.RequestCacheLevel.NoCacheNoStore);
                Stream myStream = myWebClient.OpenRead(url);
                WebHeaderCollection myHeader = myWebClient.ResponseHeaders;
                string myCharset = myHeader.Get("Content-Type");
                Match myMatch = Regex.Match(myCharset, "(?<=(charset=)).*$");
                StreamReader myReader = new StreamReader(myStream, Encoding.GetEncoding(myMatch.ToString()));
                return myReader.ReadToEnd();

            }
            catch (System.Net.Sockets.SocketException ex)
            {
               return  ex.Message.ToString();
            }

        }
        /// <summary>
        ///
        /// </summary>
        class MyClient : WebClient
        {
            private bool tf = false;
            public bool HeadOnly
            {
                get { return tf; }
                set { value = tf; }
            }
            protected override WebRequest GetWebRequest(Uri address)
            {
                WebRequest req = base.GetWebRequest(address);
                if (HeadOnly && req.Method == "GET")
                {
                    req.Method = "HEAD";
                }
                return req;
            }
        }

}
}