|
|
发表于 2016-2-26 16:23:12
|
显示全部楼层
9 C3 t3 _+ y# }# E( b缺少一个gethtml,用下面这个:1 z! p, E- `6 f2 T" m- m, G/ S
- 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 1 Q/ b' |. _: [- @
- {
. A! r' Z2 K6 H2 o2 D( U: p - string strWebData = "error";
- G, b& \7 p# q5 s- ^; D# F f - try* n$ ?2 q; Y5 P/ L P
- {# Y, u: V( R. w9 ]! j/ Y% U3 T
- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient 9 {5 c4 X2 ]3 o* \2 A( N/ M: c; z
- // 需要注意的:
% G+ l- c; V. A+ T, B$ X - //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
9 \. ~3 P$ J/ p5 b$ ?5 n. j - //这是就要具体问题具体分析比如在头部加入cookie
3 V$ `+ b# [0 U. P* ^ I: u9 ^" S; \* ? - // webclient.Headers.Add("Cookie", cookie);
% |4 D% K6 f. @, T) |. q - //这样可能需要一些重载方法。根据需要写就可以了
& Z- [( W' h! U4 _( 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)");
. }( \1 ]+ |* R# ~3 s - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
1 E' H6 m! z7 w- L- R- z; x - //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。 . l+ H9 u- u4 C. z" r% H! b
- myWebClient.Credentials = CredentialCache.DefaultCredentials;4 r. m% T0 M# C
- //如果服务器要验证用户名,密码 # U! d7 j( \# g; R
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); . L+ ~$ z2 A$ k' x: R& T) t d- R% ?: q
- //myWebClient.Credentials = mycred;
2 o$ h0 X' J6 v7 L9 e - //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) ; P- C. Z) R! R2 ~
- byte[] myDataBuffer = myWebClient.DownloadData(url);
7 T# P2 _" _( f" |9 C: k - strWebData = Encoding.Default.GetString(myDataBuffer);
( N# d( {% z$ l - 7 m# ?- g# t, O! I3 S
- //获取网页字符编码描述信息 $ Y; W& c" F& ^! U' l- D
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
& H, c7 s; T: x" V% l+ j6 Y _ - string webCharSet = charSetMatch.Groups[2].Value;
4 B8 y" {0 _) `' b" Q7 Q1 k/ Q - if (charSet == null || charSet == ""), S, _9 g7 y" `1 P* S- n8 v
- charSet = webCharSet;
5 Y9 y; [3 E$ ~6 _+ l - if (charSet.Length > 0)9 x/ G: z( `% ~8 {( F
- {$ ^% H- \. f# p3 R
- charSet = charSet.Replace(""", "");( W2 Y8 ]2 u+ Y- y3 Z
- }9 D/ z- W0 _- {
- if (UseUTF8CharSet)
3 f$ y% R" A/ Z* \ - {
- v( Y- G& \7 y' U1 ^ - if (charSet == null || charSet.Length == 0)
1 D6 y' Y5 D$ l: ^( ?7 U" p+ f1 K - {6 q( m( s" T5 ?$ j5 z. q
- charSet = "utf-8";# B6 _7 o3 m9 `+ T
- }
( j: _: r3 T4 w% R2 r+ | - }3 a' U: {5 [3 ^+ h
- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)$ m4 N& f- ]8 } u, U4 N& [$ E
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
4 h; [( z! D5 A# y - 3 h! E' `1 W& {( L- T- z* u
- }8 w4 z0 t- o0 d! l2 G
- catch (Exception)+ F8 h6 R! i; A* I2 ~4 ]0 e7 s2 O
- {+ ], e( y# i R3 c4 [* |+ D
- strWebData = "error";
( @6 }; \- Y0 Z& n4 I - }
4 n6 X0 l6 V' z5 A x9 L7 d
" ~) L/ G$ ~: _9 [8 o- return strWebData;7 A$ J T6 E, z( h3 P3 n
- }
复制代码 9 |' q0 o0 m& P, m
, K# m" q9 Y5 {# [8 w9 c |
|