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发表于 2016-2-26 16:23:12
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8 |5 M% J" Y3 i0 y3 \. v- u0 [8 X `缺少一个gethtml,用下面这个:- _0 ?' V+ l. y
- public string getHtml(string url, string charSet, bool UseUTF8CharSet)//url是要访问的网站地址,charSet是目标网页的编码,如果传入的是null或者"",那就自动分析网页的编码
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$ A6 P& b" |9 K# \( p - string strWebData = "error";
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- {
( T6 y) V$ o% O: v - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient , I6 l2 A1 J2 v
- // 需要注意的: - Q' \+ H3 E7 U
- //有的网页可能下不下来,有种种原因比如需要cookie,编码问题等等 7 }+ [: @2 o0 E5 j. c$ j
- //这是就要具体问题具体分析比如在头部加入cookie
7 p5 \" J. s/ E8 S2 t - // webclient.Headers.Add("Cookie", cookie);
! u0 Y% F Y1 q" }8 ^) ] - //这样可能需要一些重载方法。根据需要写就可以了7 k( e" Q& a6 T9 N
- myWebClient.Headers.Add("User-agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)");% M; F8 F+ J7 {& n2 i: r% A
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
# n9 o7 k2 [( E; x Z* m - //获取或设置用于对向 Internet 资源的请求进行身份验证的网络凭据。
# N; j; x: a: _1 m, T7 H* F - myWebClient.Credentials = CredentialCache.DefaultCredentials;
; ]# \+ Q9 {, G* ]+ d9 ~ - //如果服务器要验证用户名,密码 % \, D9 P7 M1 o) S6 h( D' O7 K
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
- `0 `1 G% C* F1 e2 i+ \) ]# i" ? - //myWebClient.Credentials = mycred;
7 c7 m) S- K1 G! L* \* X - //从资源下载数据并返回字节数组。(加@是因为网址中间有"/"符号) 4 [3 `0 F. U& u
- byte[] myDataBuffer = myWebClient.DownloadData(url);& S3 _! z+ [2 c$ ]
- strWebData = Encoding.Default.GetString(myDataBuffer);
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# D2 P; o$ [( k2 b" p/ q$ F- //获取网页字符编码描述信息 3 p1 x6 ~/ ?1 V Z
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
) Z6 }, m M, z. P - string webCharSet = charSetMatch.Groups[2].Value;$ }+ [$ F5 M3 G! ^+ f; O
- if (charSet == null || charSet == "")
6 R' M% h* {6 o- a: c. w& g1 Z% t6 k - charSet = webCharSet;
' A/ T& @ q; T - if (charSet.Length > 0)+ ]4 V) U: ^+ ?1 B5 q3 P
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- charSet = charSet.Replace(""", "");
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- if (UseUTF8CharSet)
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) j% V' Y0 Q/ B( R$ V& s - if (charSet == null || charSet.Length == 0)
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- charSet = "utf-8";# l/ v, R5 Q( G4 u7 o" z0 J
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default) O) t4 Y: C' g# x: h
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);2 T) W- l' \/ b1 C6 Q4 s% k8 d
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- catch (Exception)/ e M+ [6 i7 i e2 p5 u
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- strWebData = "error";
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- {0 L/ l. j' V8 e0 ^7 s# V- return strWebData;
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