C#数据采集类

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>

    /// 远程文件抓取类

    /// </summary>

    public class GetRemoteObj

    {

      

        #region 构造与析构函数

        public GetRemoteObj()

        {

            //

            // TODO: 在此处添加构造函数逻辑

            //

        }

        ~GetRemoteObj()

        {

            Dispose();

        }

        #endregion



        #region IDisposable 成员



        public void Dispose()

        {           

            GC.SuppressFinalize(this);

        }



        #endregion



        #region 日期随机函数

        /**********************************

         * 函数名称:DateRndName

         * 功能说明:日期随机函数

         * 参    数:ra:随机数

         * 调用示例:

         *          GetRemoteObj o = new GetRemoteObj();

         *          Random ra = new Random();

         *          string s = o.DateRndName(ra);

         *          Response.Write(s);

         *          o.Dispose();

         * ********************************/

        /// <summary>

        /// 日期随机函数

        /// </summary>

        /// <param name="ra">随机数</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 取得文件后缀

        /**********************************

         * 函数名称:GetFileExtends

         * 功能说明:取得文件后缀

         * 参    数:filename:文件名称

         * 调用示例:

         *          GetRemoteObj o = new GetRemoteObj();

         *          string url = @"http://www.baidu.com/img/logo.gif";

         *          string s = o.GetFileExtends(url);

         *          Response.Write(s);

         *          o.Dispose();

         * ********************************/

        /// <summary>

        /// 取得文件后缀

        /// </summary>

        /// <param name="filename">文件名称</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 获取远程文件源代码

        /**********************************

         * 函数名称:GetRemoteHtmlCode

         * 功能说明:获取远程文件源代码

         * 参    数:Url:远程url

         * 调用示例:

         *          GetRemoteObj o = new GetRemoteObj();

         *          string url = @"http://www.baidu.com/";

         *          string s = o.GetRemoteHtmlCode(url);

         *          Response.Write(s);

         *          o.Dispose();

         * ********************************/

        /// <summary>

        /// 获取远程文件源代码

        /// </summary>

        /// <param name="url">远程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 保存远程文件

        /**********************************

         * 函数名称:RemoteSave

         * 功能说明:保存远程文件

         * 参    数:Url:远程url;Path:保存到的路径

         * 调用示例:

         *          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>

        /// 保存远程文件

        /// </summary>

        /// <param name="Url">远程url</param>

        /// <param name="Path">保存到的路径</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 替换网页中的换行和引号

        /**********************************

         * 函数名称:ReplaceEnter

         * 功能说明:替换网页中的换行和引号

         * 参    数:HtmlCode:html源代码

         * 调用示例:

         *          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>

        /// 替换网页中的换行和引号

        /// </summary>

        /// <param name="HtmlCode">HTML源代码</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 执行正则提取出值

        /**********************************

         * 函数名称:GetRegValue

         * 功能说明:执行正则提取出值

         * 参    数:HtmlCode:html源代码

         * 调用示例:

         *          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>

        /// 执行正则提取出值

        /// </summary>

        /// <param name="RegexString">正则表达式</param>

        /// <param name="RemoteStr">HtmlCode源代码</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 替换HTML源代码

        /**********************************

         * 函数名称:RemoveHTML

         * 功能说明:替换HTML源代码

         * 参    数:HtmlCode:html源代码

         * 调用示例:

         *          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>

        /// 替换HTML源代码

        /// </summary>

        /// <param name="HtmlCode">html源代码</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 匹配页面的链接

        /**********************************

         * 函数名称:GetHref

         * 功能说明:匹配页面的链接

         * 参    数:HtmlCode:html源代码

         * 调用示例:

         *          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>

        /// 获取页面的链接正则

        /// </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=", "").Trim() + "||";

            }

            return MatchVale;         

        }

        #endregion



        #region 匹配页面的图片地址

        /**********************************

         * 函数名称:GetImgSrc

         * 功能说明:匹配页面的图片地址

         * 参    数:HtmlCode:html源代码;imgHttp:要补充的http.当比如:<img src="bb/x.gif">则要补充http://www.baidu.com/,当包含http信息时,则可以为空

         * 调用示例:

         *          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>

        /// 匹配页面的图片地址

        /// </summary>

        /// <param name="HtmlCode"></param>

        /// <param name="imgHttp">要补充的http://路径信息</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="" />中的图片路径实际链接

        /// </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 替换通过正则获取字符串所带的正则首尾匹配字符串

        /**********************************

         * 函数名称:GetHref

         * 功能说明:匹配页面的链接

         * 参    数:HtmlCode:html源代码

         * 调用示例:

         *          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>

        /// 替换通过正则获取字符串所带的正则首尾匹配字符串

        /// </summary>

        /// <param name="RegValue">要替换的值</param>

        /// <param name="regStart">正则匹配的首字符串</param>

        /// <param name="regEnd">正则匹配的尾字符串</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





    }

}

转自:http://www.cnblogs.com/daretodream/archive/2012/02/29/2372829.html  

你可能感兴趣的:(C#)