Asp.net 數據採集基類

using System;
using System.Data;
using System.Configuration;
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 MSXML2;
using System.Text.RegularExpressions;
namespace EC
{
    /// <summary>
    /// 遠程文件抓取類
    /// </summary>
    public class GetRemoteObj
    {
     
        #region 構造與析構函數
        public GetRemoteObj()
        {
            //
            // TODO: 在此處添加構造函數邏輯
            //
        }
        ~GetRemoteObj()
        {
            Dispose();
        }
        #endregion

        #region IDisposable 成員

        public void Dispose()
        {          
            GC.SuppressFinalize(this);
        }

        #endregion

        #region 日期隨機函數
        /**********************************
         * 函數名稱:DateRndName
         * 功能說明:日期隨機函數
         * 參    數:ra:隨機數
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          Random ra = new Random();
         *          string s = o.DateRndName(ra);
         *          Response.Write(s);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 日期隨機函數
        /// </summary>
        /// <param name="ra">隨機數</param>
        /// <returns></returns>
        public  string DateRndName(Random ra)
        {
            DateTime d = DateTime.Now;
            string s = null, y, m, dd, h, mm, ss;
            y = d.Year.ToString();
            m = d.Month.ToString();
            if (m.Length < 2) m = "0" + m;
            dd = d.Day.ToString();
            if (dd.Length < 2) dd = "0" + dd;
            h = d.Hour.ToString();
            if (h.Length < 2) h = "0" + h;
            mm = d.Minute.ToString();
            if (mm.Length < 2) mm = "0" + mm;
            ss = d.Second.ToString();
            if (ss.Length < 2) ss = "0" + ss;
            s += y + m + dd + h + mm + ss;
            s += ra.Next(100, 999).ToString();
            return s;
        }
        #endregion

        #region 取得文件後綴
        /**********************************
         * 函數名稱:GetFileExtends
         * 功能說明:取得文件後綴
         * 參    數:filename:文件名稱
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string url = @"http://www.baidu.com/img/logo.gif";
         *          string s = o.GetFileExtends(url);
         *          Response.Write(s);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 取得文件後綴
        /// </summary>
        /// <param name="filename">文件名稱</param>
        /// <returns></returns>
        public string GetFileExtends(string filename)
        {
            string ext = null;
            if (filename.IndexOf('.') > 0)
            {
                string[] fs = filename.Split('.');
                ext = fs[fs.Length - 1];
            }
            return ext;
        }
        #endregion

        #region 獲取遠程文件源代碼
        /**********************************
         * 函數名稱:GetRemoteHtmlCode
         * 功能說明:獲取遠程文件源代碼
         * 參    數:Url:遠程url
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string url = @"http://www.baidu.com";
         *          string s = o.GetRemoteHtmlCode(url);
         *          Response.Write(s);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 獲取遠程文件源代碼
        /// </summary>
        /// <param name="url">遠程url</param>
        /// <returns></returns>
        public string GetRemoteHtmlCode(string Url)
        {
            string s = "";
            MSXML2.XMLHTTP _xmlhttp = new MSXML2.XMLHTTPClass();
            _xmlhttp.open("GET", Url, false, null, null);
            _xmlhttp.send("");
            if (_xmlhttp.readyState == 4)
            {
                s = System.Text.Encoding.Default.GetString((byte[])_xmlhttp.responseBody);
            }
            return s;
        }

        #endregion

        #region 保存遠程文件
        /**********************************
         * 函數名稱：RemoteSave
         * 功能說明：保存遠程文件
         * 參    數：Url:遠程url;Path:保存到的路徑
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string s = "";
         *          string url = @"http://www.baidu.com/img/logo.gif";
         *          string path =Server.MapPath("Html/");
         *          s = o.RemoteSave(url,path);
         *          Response.Write(s);
         *          o.Dispose();        
         * ******************************/
        /// <summary>
        /// 保存遠程文件
        /// </summary>
        /// <param name="Url">遠程url</param>
        /// <param name="Path">保存到的路徑</param>
        /// <returns></returns>
        public string RemoteSave(string Url, string Path)
        {
            Random ra = new Random();
            string StringFileName = DateRndName(ra) + "." + GetFileExtends(Url);
            string StringFilePath = Path + StringFileName;
            MSXML2.XMLHTTP _xmlhttp = new MSXML2.XMLHTTPClass();
            _xmlhttp.open("GET", Url, false, null, null);
            _xmlhttp.send("");
            if (_xmlhttp.readyState == 4)
            {
                if (System.IO.File.Exists(StringFilePath))
                    System.IO.File.Delete(StringFilePath);
                System.IO.FileStream fs = new System.IO.FileStream(StringFilePath, System.IO.FileMode.CreateNew);
                System.IO.BinaryWriter w = new System.IO.BinaryWriter(fs);
                w.Write((byte[])_xmlhttp.responseBody);
                w.Close();
                fs.Close();
            }
            else
                throw new Exception(_xmlhttp.statusText);
            return StringFileName;
        }
        #endregion

        #region 替換網頁中的換行和引號
        /**********************************
         * 函數名稱:ReplaceEnter
         * 功能說明:替換網頁中的換行和引號
         * 參    數:HtmlCode:html源代碼
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string Url = @"http://www.baidu.com";
         *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
         *          string s = o.ReplaceEnter(HtmlCode);
         *          Response.Write(s);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 替換網頁中的換行和引號
        /// </summary>
        /// <param name="HtmlCode">HTML源代碼</param>
        /// <returns></returns>
        public string ReplaceEnter(string HtmlCode)
        {
            string s = "";
            if (HtmlCode == null || HtmlCode == "")
                s = "";
            else
                s = HtmlCode.Replace("/"", "");
            s = s.Replace("/r/n", "");
            return s;
        }

        #endregion              

        #region 執行正則提取出值
        /**********************************
         * 函數名稱:GetRegValue
         * 功能說明:執行正則提取出值
         * 參    數:HtmlCode:html源代碼
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string Url = @"http://www.baidu.com";
         *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
         *          string s = o.ReplaceEnter(HtmlCode);
         *          string Reg="<title>.+?</title>";
         *          string GetValue=o.GetRegValue(Reg,HtmlCode)
         *          Response.Write(GetValue);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 執行正則提取出值
        /// </summary>
        /// <param name="RegexString">正則表達式</param>
        /// <param name="RemoteStr">HtmlCode源代碼</param>
        /// <returns></returns>
        public string  GetRegValue(string RegexString, string RemoteStr)
        {
            string MatchVale = "";
            Regex r = new Regex(RegexString);
            Match m = r.Match(RemoteStr);
            if (m.Success)
            {
                MatchVale = m.Value;
            }
            return MatchVale;
        }
        #endregion       

        #region 替換HTML源代碼
        /**********************************
         * 函數名稱:RemoveHTML
         * 功能說明:替換HTML源代碼
         * 參    數:HtmlCode:html源代碼
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string Url = @"http://www.baidu.com";
         *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
         *          string s = o.ReplaceEnter(HtmlCode);
         *          string Reg="<title>.+?</title>";
         *          string GetValue=o.GetRegValue(Reg,HtmlCode)
         *          Response.Write(GetValue);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 替換HTML源代碼
        /// </summary>
        /// <param name="HtmlCode">html源代碼</param>
        /// <returns></returns>
        public string RemoveHTML(string HtmlCode)
        {
            string MatchVale = HtmlCode;         
            foreach (Match s in Regex.Matches(HtmlCode, "<.+?>"))
            {
                MatchVale = MatchVale.Replace(s.Value, "");
            }
            return MatchVale;       
        }

        #endregion

        #region 匹配頁面的鏈接
        /**********************************
         * 函數名稱:GetHref
         * 功能說明:匹配頁面的鏈接
         * 參    數:HtmlCode:html源代碼
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string Url = @"http://www.baidu.com";
         *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
         *          string s = o.GetHref(HtmlCode);
         *          Response.Write(s);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 獲取頁面的鏈接正則
        /// </summary>
        /// <param name="HtmlCode"></param>
        /// <returns></returns>
        public string GetHref(string HtmlCode)
        {
            string MatchVale = "";
            string Reg = @"(h|H)(r|R)(e|E)(f|F) *= *('|"")?((/w|//|//|/.|:|-|_)+)('|""| *|>)?";          
            foreach(Match m in Regex.Matches(HtmlCode,Reg))
            {
                MatchVale += (m.Value).ToLower().Replace("href=", _fcksavedurl=""," "").Trim() + "||";
            }
            return MatchVale;        
        }
        #endregion

        #region 匹配頁面的圖片地址
        /**********************************
         * 函數名稱:GetImgSrc
         * 功能說明:匹配頁面的圖片地址
         * 參    數:HtmlCode:html源代碼;imgHttp:要補充的http.當比如:<img src="bb/x.gif">則要補充http://www.baidu.com/,當包含http信息時,則可以爲空
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string Url = @"http://www.baidu.com";
         *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
         *          string s = o.GetImgSrc(HtmlCode,"http://www.baidu.com/");
         *          Response.Write(s);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 匹配頁面的圖片地址
        /// </summary>
        /// <param name="HtmlCode"></param>
        /// <param name="imgHttp">要補充的http://路徑信息</param>
        /// <returns></returns>
        public string GetImgSrc(string HtmlCode, string imgHttp)
        {
            string MatchVale = "";
            string Reg = @"<img.+?>";
            foreach (Match m in Regex.Matches(HtmlCode, Reg))
            {
                MatchVale += GetImg((m.Value).ToLower().Trim(), imgHttp) + "||";
            }
            return MatchVale;
        }
        /// <summary>
        /// 匹配<img src="" />中的圖片路徑實際鏈接
        /// </summary>
        /// <param name="ImgString"><img src="" />字符串</param>
        /// <returns></returns>
        public string GetImg(string ImgString, string imgHttp)
        {
            string MatchVale = "";
            string Reg = @"src=.+/.(bmp|jpg|gif|png|)";
            foreach (Match m in Regex.Matches(ImgString.ToLower(), Reg))
            {
                MatchVale += (m.Value).ToLower().Trim().Replace("src=","");
            }
            return (imgHttp+MatchVale);
        }

        #endregion

        #region 替換通過正則獲取字符串所帶的正則首尾匹配字符串
        /**********************************
         * 函數名稱:GetHref
         * 功能說明:匹配頁面的鏈接
         * 參    數:HtmlCode:html源代碼
         * 調用示例:
         *          GetRemoteObj o = new GetRemoteObj();
         *          string Url = @"http://www.baidu.com";
         *          strion HtmlCode = o.GetRemoteHtmlCode(Url);
         *          string s = o.RegReplace(HtmlCode,"<title>","</title>");
         *          Response.Write(s);
         *          o.Dispose();
         * ********************************/
        /// <summary>
        /// 替換通過正則獲取字符串所帶的正則首尾匹配字符串
        /// </summary>
        /// <param name="RegValue">要替換的值</param>
        /// <param name="regStart">正則匹配的首字符串</param>
        /// <param name="regEnd">正則匹配的尾字符串</param>
        /// <returns></returns>
        public string RegReplace(string RegValue, string regStart,string regEnd)
        {
            string s = RegValue;
            if (RegValue != "" && RegValue != null)
            {
                if (regStart != "" && regStart != null)
                {
                    s = s.Replace(regStart, "");
                }
                if (regEnd != "" && regEnd != null)
                {
                    s = s.Replace(regEnd, "");
                }
            }
            return s;
        }
        #endregion

    }
}