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发表于 2016-2-26 16:23:12
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A/ |: m# S7 W8 Z: J缺少一个gethtml,用下面这个:1 o2 _: P/ h5 m+ \# J0 W2 F+ |/ X
- 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 5 K( F A* G0 H, A* f4 r: n
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- string strWebData = "error";- ^. {; ^9 {( k k8 j u2 \
- try) E5 t2 a4 N9 L9 \+ V( n
- {
1 j, y- W: } b3 O - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient " L& J3 l8 q+ f; X, F! [* c, j) ^0 w7 o. Y
- // 需要注意的: 1 @4 V! c% ]0 F/ I. u" n$ _8 i1 H8 g
- //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 4 R1 e: P: A7 t5 U
- //这是就要具体问题具体分析比如在头部加入cookie
8 V! S6 L8 J% o6 x - // webclient.Headers.Add("Cookie", cookie); / u D8 D, j2 Y5 z* n5 [
- //这样可能需要一些重载方法。根据需要写就可以了. L( D! p- V! | ] u
- 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)");: d, _8 q- o$ x" k5 g
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
! {5 U0 _% y1 o0 u- s" ? - //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。 1 [9 D1 r0 l. v: _# x
- myWebClient.Credentials = CredentialCache.DefaultCredentials;
! i4 N9 o- Q/ T+ e% I - //如果服务器要验证用户名,密码 : i7 Z6 L, K; t8 ~
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
& u9 _" r$ Y/ k: _* t. l6 o - //myWebClient.Credentials = mycred;
' K; E0 d9 M4 A# Y( f% r! n - //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) + }; S, B: L0 K0 _5 E: T! E
- byte[] myDataBuffer = myWebClient.DownloadData(url);
1 `1 G+ g) O) m' Z8 E% T+ U% O8 n, v - strWebData = Encoding.Default.GetString(myDataBuffer);4 O0 ~9 d9 a& X3 R" D' D
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- //获取网页字符编码描述信息 ' u6 v7 ]) ?/ S# W% F2 R% `% ]& g$ Z
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);. e4 w; [4 P. X o" R
- string webCharSet = charSetMatch.Groups[2].Value;* K( m3 {. b; q! e$ N
- if (charSet == null || charSet == "")
2 ~7 E# I$ E, `4 E - charSet = webCharSet;
( M3 b" t$ r& ~# J7 D - if (charSet.Length > 0)
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- charSet = charSet.Replace(""", "");: @2 m) ~3 N& {" E$ m$ |
- }
& F2 ]& [0 t3 H& U8 y+ d - if (UseUTF8CharSet)( u1 y# Y* k4 G4 P+ F
- {
: t( g3 f$ G5 W+ ?- \ - if (charSet == null || charSet.Length == 0); p2 t' i% Q' t
- {
: r% x: s6 M8 j% T - charSet = "utf-8";% ~7 X, v# }; o; {! ?0 U
- }) z; L/ H9 C6 T: a& [
- }
) j# n4 r9 x" b O( D$ p' k; T3 r - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
% T& J+ ` G1 p q - strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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- catch (Exception)
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- strWebData = "error";
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- return strWebData;
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复制代码
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