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
{
/// 

/// 远程文件抓取类
/// 
    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();
         * ********************************/
/// 

/// 日期随机函数
/// 
/// 随机数
/// 
        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();
         * ********************************/
/// 

/// 取得文件后缀
/// 
/// 文件名称
/// 
        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();
         * ********************************/
/// 

/// 获取远程文件源代码
/// 
/// 远程url
/// 
        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();         
         * ******************************/
/// 

/// 保存远程文件
/// 
/// 远程url
/// 保存到的路径
/// 
        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();
         * ********************************/
/// 

/// 替换网页中的换行和引号
/// 
/// HTML源代码
/// 
        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="";
         *          string GetValue=o.GetRegValue(Reg,HtmlCode)
         *          Response.Write(GetValue);
         *          o.Dispose();
         * ********************************/
/// 

/// 执行正则提取出值
/// 
/// 正则表达式
/// HtmlCode源代码
/// 
        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="";
         *          string GetValue=o.GetRegValue(Reg,HtmlCode)
         *          Response.Write(GetValue);
         *          o.Dispose();
         * ********************************/
/// 

/// 替换HTML源代码
/// 
/// html源代码
/// 
        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();
         * ********************************/
/// 

/// 获取页面的链接正则
/// 
/// 
/// 
        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: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();
         * ********************************/
/// 

/// 匹配页面的图片地址
/// 
/// 
/// 要补充的http://路径信息
/// 
        public string GetImgSrc(string HtmlCode, string imgHttp)
        {
string MatchVale = "";
string Reg = @"";
foreach (Match m in Regex.Matches(HtmlCode, Reg))
            {
                MatchVale += GetImg((m.Value).ToLower().Trim(), imgHttp) + "||";
            }
return MatchVale;
        }
/// 

/// 匹配中的图片路径实际链接
/// 
/// 字符串
/// 
        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,"");
         *          Response.Write(s);
         *          o.Dispose();
         * ********************************/
/// 

/// 替换通过正则获取字符串所带的正则首尾匹配字符串
/// 
/// 要替换的值
/// 正则匹配的首字符串
/// 正则匹配的尾字符串
/// 
        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


    }
}