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发表于 2016-2-26 16:23:12
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缺少一个gethtml,用下面这个:" ~1 e: [/ T3 B- y9 m
- 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
+ v8 l0 r# h# P& J - {
' w1 V' F8 e- s2 v( v- {) S - string strWebData = "error";' [1 {7 D% F2 c N
- try
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- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient , @1 h8 Y7 r9 }9 u5 `
- // 需要注意的: T% `, M: f) _9 s$ N1 K
- //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
3 h, F! s$ s( ^1 x - //这是就要具体问题具体分析比如在头部加入cookie ( J5 ^. C& D k9 k9 B
- // webclient.Headers.Add("Cookie", cookie); # D0 M' I* Y9 N! K3 r# T/ o7 j \
- //这样可能需要一些重载方法。根据需要写就可以了 {1 {+ U; M2 Q0 @2 y) ?) a
- 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)");
3 n3 m" f' K; g. _+ P2 G - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
1 {% U( P9 {- L2 v - //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。
) x1 y) h- f- w4 l - myWebClient.Credentials = CredentialCache.DefaultCredentials;
# H8 P/ I; ~$ { - //如果服务器要验证用户名,密码
; B: F1 S0 ?! B8 Y I6 S - //NetworkCredential mycred = new NetworkCredential(struser, strpassword); 3 v+ s; j/ I, ^% d w
- //myWebClient.Credentials = mycred; ' W5 M, O- `7 | K. t
- //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) e' u" o; e! Q$ g
- byte[] myDataBuffer = myWebClient.DownloadData(url);+ h- h O m$ `3 }1 v
- strWebData = Encoding.Default.GetString(myDataBuffer);
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) y4 Z! x! w+ s2 ^- B- //获取网页字符编码描述信息 : B) G0 W& }0 j6 C4 ]# s3 S
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
2 ~; B0 ?$ n i+ t2 Q: } - string webCharSet = charSetMatch.Groups[2].Value;
2 I( p# H& H/ Y4 e - if (charSet == null || charSet == "")
& C) ?& ]4 m( J. b - charSet = webCharSet;
5 \, e7 g7 [) a8 Q5 Q/ m { s9 ` - if (charSet.Length > 0)" ~: m% R7 ]3 [6 d. d: C9 z5 W# ]) Q
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- charSet = charSet.Replace(""", "");
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8 \' a1 P5 r* W0 x( t, f - if (UseUTF8CharSet)
+ X8 N' L4 J. [ - {" a% F6 a1 P; M- O" C0 i% W
- if (charSet == null || charSet.Length == 0)8 z/ e# Y7 h7 y4 I0 ]
- {
* H1 N& j. w; W6 _* ? - charSet = "utf-8";. P# ~& n2 \7 x, e
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
" y0 c$ v. T; D9 {$ ]" H - strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);4 t. w @0 n: \* e
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' D. k( X) y8 w+ ]6 x/ ~ - catch (Exception)* Q) a% l0 _" g, K. P2 f. a
- {
5 ]0 D- s) g% \4 e* X9 r1 F - strWebData = "error";
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! N: n+ V$ Q, ^8 ~4 m, g- return strWebData;
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