|
|
发表于 2016-2-26 16:23:12
|
显示全部楼层
" S) K& w2 P" A8 w! x1 Y
缺少一个gethtml,用下面这个:
. X4 \" E" 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 ( k S( @% ~, L6 ?
- {8 q/ S4 |7 D- f' \/ W$ o" ^. F
- string strWebData = "error";
2 n7 M/ F& T) x" {( X, n - try
; k) A+ q3 S z7 a - {
0 w* P" Y# u# \ - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient . ~2 ]# Y. N4 h' T! ^+ j
- // 需要注意的: ; @, g. X9 D" g; p7 ]
- //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
& l7 N. _- ^; y' d6 V& k - //这是就要具体问题具体分析比如在头部加入cookie
( j: N c: d$ M; w& c/ h, `( ^ - // webclient.Headers.Add("Cookie", cookie);
. J5 O8 A% \& O! o# p1 f# [8 P - //这样可能需要一些重载方法。根据需要写就可以了3 E7 X4 V1 s/ M% V
- 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)");* t" [+ Z' q. x2 s
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");! y1 e+ r4 Q8 l* {0 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。
7 k0 Q2 \) P: H0 U# J4 z7 y- N - myWebClient.Credentials = CredentialCache.DefaultCredentials;
9 N+ d! M. q$ Y& G2 l - //如果服务器要验证用户名,密码 & e! }' z6 Y( U
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); 9 t1 {+ Y& D' y4 b& _ v5 v
- //myWebClient.Credentials = mycred;
9 X6 e% r: x' H9 D8 Y% i - //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)
! G! L! { B3 {3 Q( K - byte[] myDataBuffer = myWebClient.DownloadData(url);" e4 }: o! h/ ]" W2 @" P$ o
- strWebData = Encoding.Default.GetString(myDataBuffer);
( f3 D, e+ i% [9 P, ?8 Z
- D0 [6 l X; g. C; Y+ }- //获取网页字符编码描述信息 6 ~! O; a' v. B: H9 C
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
. D& J; f' g- N9 u [8 G) E' s! ~ - string webCharSet = charSetMatch.Groups[2].Value;
- M$ y) [5 m; P9 x% B- t! Q - if (charSet == null || charSet == "")
8 _: D6 U; d$ \7 s# i - charSet = webCharSet;
3 p9 O! Z. w% Y9 T - if (charSet.Length > 0)
8 [8 X0 H2 p, D# u* s: e - {
/ b2 h3 F1 v. M* t3 ` - charSet = charSet.Replace(""", "");3 e* G B3 X9 f: c
- }2 Z. N, N, p. v: N! e3 C- D" C# a" s
- if (UseUTF8CharSet)
1 |6 h2 r3 x7 @# D - {
7 e* K0 @% b( x% q" w9 n, v4 z2 C! G - if (charSet == null || charSet.Length == 0), o q# r( W: ?# k5 B# w7 ]
- {
& ~4 M, J8 d% p) M8 G - charSet = "utf-8";
+ Y+ y/ z- r( C' B% Y - }1 J! V8 a( N6 }
- }! i& S8 I! B! M' c& v$ F: }/ a
- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)+ _6 w- F3 @: ?
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);8 H* m* i. L5 E" P
! |1 O/ e. `4 l$ J4 @6 \- }, I3 {$ D% M+ K0 J" C9 k" G
- catch (Exception)8 i6 C! b! P9 i" Z5 \/ N0 Y8 ]5 G* t
- {
4 V3 v; ?" B( r, q - strWebData = "error";
+ V6 ]9 n3 a t - }
( A/ c0 ~" p! T8 t+ B
9 F$ P$ X4 ~1 Q- return strWebData;$ I! X+ |0 d3 @) Q+ B# q
- }
复制代码 # d; a- }) f% b; {0 x2 | F
' z# A, O# u( a) @- v& j
|
|