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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:
3 N3 Z: ]6 P& l1 Z- 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 9 A8 E6 Y$ ^: N: I. i
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- string strWebData = "error";
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- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient ; `: O, N3 s: _, b N+ s0 y
- // 需要注意的: ; p( r: M* j2 I) m
- //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
6 ~( y: y2 p( ?/ ~% | - //这是就要具体问题具体分析比如在头部加入cookie
9 V" I$ K3 n$ Z$ @ - // webclient.Headers.Add("Cookie", cookie);
^- g, c& t3 X; V/ d( w - //这样可能需要一些重载方法。根据需要写就可以了: @& }' f" K4 P+ g/ f6 I
- 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)");
6 j! T# A, c O$ u$ t - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
' M4 w1 S! ~% 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。
, I, P$ P% ~2 X/ [9 E - myWebClient.Credentials = CredentialCache.DefaultCredentials;
8 h9 N9 J" E) V, i& k1 u* K3 h. U - //如果服务器要验证用户名,密码
0 f+ [0 N, a- L' U - //NetworkCredential mycred = new NetworkCredential(struser, strpassword); 9 y; p) U ]) q
- //myWebClient.Credentials = mycred; , _6 J' ~* P3 L* k
- //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)
' X3 P6 G8 ^3 M" S$ e: c - byte[] myDataBuffer = myWebClient.DownloadData(url);" T2 g- g2 _+ G' f8 _
- strWebData = Encoding.Default.GetString(myDataBuffer);+ J& Q- B$ c1 K
- 2 C* ^, ~) r# x. L( \
- //获取网页字符编码描述信息
+ C% x; D R8 ]1 i( f) D1 i - Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline); T7 J; o7 D7 { M' C% [
- string webCharSet = charSetMatch.Groups[2].Value;7 Y$ \! q: }) Y1 x& o
- if (charSet == null || charSet == "")7 `+ J/ H# g9 \2 P; P$ J2 b
- charSet = webCharSet;8 V K4 C1 B7 n( J3 i s* a
- if (charSet.Length > 0)
7 \+ }) f: F. U0 P B5 l0 _ [9 L - {
2 Y" [& E& D3 V) ^; p6 l" }& J - charSet = charSet.Replace(""", "");
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- if (UseUTF8CharSet)! w9 @; a* d& g0 j
- {
% A' L" y' E' _% ^/ | - if (charSet == null || charSet.Length == 0)
# b( ^3 {: _8 g( e2 B( D8 I - {
' P4 m& c3 P( p! Y - charSet = "utf-8";2 C u t3 p) u: ^. \- d: n
- }; |; t r% C$ Y/ S3 m& T
- }
+ T! ~6 I% G, P7 }; T - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)( y, i8 M8 ?7 B- X7 m% I7 x
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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9 y. o$ G" t2 ~' K, x( F& }; Q - catch (Exception)
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- strWebData = "error";
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$ O/ F% q1 N3 P/ G* x" y, A1 I- return strWebData;3 H4 l. w/ g2 T! e: e. C7 a* a
- }
复制代码 & J; j# N4 E2 m. K
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