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【Asp.Net】 asp.net（C#）数据采集类
作者:Dezai.CN / 发布于2013/5/12/ 571

	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

	
	 }
	}
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