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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:. [: f! m) A4 u$ L1 A5 R% o( @
- 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 : p" I+ A$ y& R, G! U3 v
- {
" m' g2 M& b M& Q$ z, Q6 g - string strWebData = "error";
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7 j/ M; n* N5 A% c+ r6 x. |$ Z - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient ; @, u, M' o, w; X( e$ W; g
- // 需要注意的: ( B. s! l ^& \; d, c6 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 # g, ]: ~. A% b2 n* d! _5 Y- h5 A
- //这是就要具体问题具体分析比如在头部加入cookie 7 G' K Y* o+ [2 k- }5 r( Q8 P
- // webclient.Headers.Add("Cookie", cookie); ) S9 O' e1 Q ~) h2 G& Q3 y8 H8 `
- //这样可能需要一些重载方法。根据需要写就可以了
. ^# w- r0 H; Q1 D' D' Q( h% T - 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+ F% j7 Y0 J: T5 e2 Q - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
4 t! Z; q& _* i1 E' K - //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( X$ u" w" J
- myWebClient.Credentials = CredentialCache.DefaultCredentials;
( e1 S) I$ [, s - //如果服务器要验证用户名,密码 ! T7 o5 c6 H( `
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); 7 b9 Z, i) B$ B! g
- //myWebClient.Credentials = mycred; S+ r. ?% S' U
- //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)
0 f( I. N8 o3 s9 k - byte[] myDataBuffer = myWebClient.DownloadData(url);
2 B& N+ |' |- Y6 W) p% g - strWebData = Encoding.Default.GetString(myDataBuffer);2 d$ O3 w4 z: [) @
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- //获取网页字符编码描述信息 6 N5 {6 e0 A: o( x8 t
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
2 ` Z4 ~1 P+ m9 k0 K- R - string webCharSet = charSetMatch.Groups[2].Value;
0 Q: m& G& N2 R - if (charSet == null || charSet == "")- j2 z1 ~1 t* s4 f; u' x+ b
- charSet = webCharSet;2 ]8 H$ S1 P" m/ E
- if (charSet.Length > 0)2 X5 L7 N- X% {& E
- {
# [0 r+ R6 o/ ^3 I& h$ a( H - charSet = charSet.Replace(""", "");5 A" T2 V9 `1 Z' K7 x3 S7 j
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- if (UseUTF8CharSet)( Z8 i& M1 {/ R7 U: D
- {
4 Z8 J. j% r$ L) k* f$ H - if (charSet == null || charSet.Length == 0)/ M2 B) t7 W; n/ B& E, @, }
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- charSet = "utf-8";+ q# A3 t0 d, ~* \3 \- m6 P d
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)' H5 \! `( K, o q6 `' g
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);. |- O% L5 q4 f2 l5 r
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- catch (Exception)0 K# K+ H: r! ?( J- T" C
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- strWebData = "error";3 `, }: L2 R8 Z" Q
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, B; }1 E+ o. \& Q1 J! g5 n2 s4 W- return strWebData;8 N% ]' g) n& J5 ^
- }
复制代码 . U2 O5 c9 h/ h/ ]2 a" U' }
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