asp.net(C#)数据采集类

2016-12-30 09:57:38来源:oschina作者:深圳大道人点击

using System;
using System.Data;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Web;
using MSXML2; //添加引用 COM - Microsoft XML V3.0-V6.0
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 取得文件后缀
///
/// 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.XMLHTTP();
_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 = @"/2014th7cj/d/file/p/20161230/z2zs21ctyup.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 = DateTime.Now.ToString("yyyyMMddHHmmssffff") + "." + GetFileExtends(Url);
string StringFilePath = Path + StringFileName;
MSXML2.XMLHTTP _xmlhttp = new MSXML2.XMLHTTP();
_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
///
/// 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 替换HTML标签
///
/// 替换HTML标签
///

/// 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
///
/// 获取页面的链接正则
///

///
///
public List GetHref(string HtmlCode)
{
List list = new List();
string Reg = @"(h|H)(r|R)(e|E)(f|F) *= *('|"")?((/w|//|//|/.|:|-|_)+)('|""| *|>)?";
foreach (Match m in Regex.Matches(HtmlCode, Reg))
{
list.Add((m.Value).ToLower().Replace("href=", "").Trim());
}
return list;
}
#endregion
#region 匹配页面的图片地址
///
/// 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 获得指定Html代码中所有超级连接的标题和连接地址
///
/// 获得指定Html代码中所有超级连接的标题和连接地址:测试有效 反回Dictionary key-标题value-地址
///

/// 需要匹配出超级连接的HTML代码
///
public Dictionary GetCodeHref(string HtmlCode)
{
Dictionary dic = new Dictionary();
//匹配指定HTML代码中所有的超级连接中的href 和超连接文字内容的正则 有时候需要根据实际情况做小调整如果标题中间有文字的话
string regex = @"/[^""]*)""|'(?[^']*)'|(?[^/>^/s]+)).*/>(?[^/<^/>]*)/<[^/</a/>]*/a/>";<br> Regex reg1 = new Regex(regex, RegexOptions.IgnoreCase);//创建正则表达式对象 <br> MatchCollection ms1 = reg1.Matches(HtmlCode);//根据正则表达式匹配出所有匹配项返匹配集合 <br> foreach (Match m1 in ms1)//迭代集合获得每个匹配项 <br> {<br>dic.Add(m1.Groups["title"].Value, m1.Groups["url"].Value);<br> }<br> return dic;<br> }<br> #endregion<br> #region 正则获得字符串中开始和结束字符串之间的值<br> /// <summary><br> /// 正则获得字符串中开始和结束字符串之间的值<br> /// </summary><br> /// <param name="str">字符串</param><br> /// <param name="s">开始</param><br> /// <param name="e">结束</param><br> /// <returns></returns> <br> public string GetRegValue(string str, string s, string e)<br> {<br> Regex rg = new Regex("(?<=(" + s + "))[.//s//S]*?(?=(" + e + "))", RegexOptions.Multiline | RegexOptions.Singleline);<br> return rg.Match(str).Value;<br> }<br> /// <summary><br> /// 正则获得字符串中开始和结束字符串之间的值<br> /// </summary><br> /// <param name="str">字符串</param><br> /// <param name="s">开始</param><br> /// <param name="e">结束</param><br> /// <returns></returns><br> public List<string> GetRegValueArr(string str, string s, string e)<br> {<br> Match m;<br> List<string> list = new List<string>();<br> Regex rg = new Regex("(?<=(" + s + "))[.//s//S]*?(?=(" + e + "))", RegexOptions.Multiline | RegexOptions.Singleline);<br> for (m = rg.Match(str); 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