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发表于 2016-2-26 16:23:12
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) a B& v, _8 j2 c! @9 r7 T+ M9 n缺少一个gethtml,用下面这个:, o( L' d& u6 X
- 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 8 @( E# X3 D7 v) ~! y
- {
* `3 d1 H8 m5 d* _2 o: m- F - string strWebData = "error";
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- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient ) C+ B9 X) H0 X: l
- // 需要注意的: - e+ W+ c/ |1 B' F0 f2 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 7 s% L6 _7 G5 ]8 Z
- //这是就要具体问题具体分析比如在头部加入cookie
& l1 I V3 k" o4 h - // webclient.Headers.Add("Cookie", cookie);
3 p: @) K( v& |( c* K, q6 F2 o. }+ q+ p - //这样可能需要一些重载方法。根据需要写就可以了% p* L2 i, |3 r
- 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)");# U" T W) I. G, G P3 ~
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");4 U6 D5 Z3 ~: ~7 e
- //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。 F( k! x! P( b2 b2 ]6 q5 Z
- myWebClient.Credentials = CredentialCache.DefaultCredentials;
0 P5 Z0 D* c) U+ @% j - //如果服务器要验证用户名,密码
. i( y' _& G" C8 S/ F - //NetworkCredential mycred = new NetworkCredential(struser, strpassword); " y' B; N- d, [) _$ o
- //myWebClient.Credentials = mycred;
: Y* E0 v( Z3 ?' C1 |! J - //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)
* o1 ~2 Z r- G9 x" t( E - byte[] myDataBuffer = myWebClient.DownloadData(url);$ n8 i; C6 |4 e; g N
- strWebData = Encoding.Default.GetString(myDataBuffer);
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- //获取网页字符编码描述信息 * k% U- t5 G; s7 I. `3 `( e' T
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
0 J0 v8 T4 k" _# q% T4 f: ^ - string webCharSet = charSetMatch.Groups[2].Value;
& ?- l$ C1 _; } - if (charSet == null || charSet == ""), S; b$ C% j5 _/ A
- charSet = webCharSet;
; H9 j5 d4 c0 H5 o - if (charSet.Length > 0)+ w! A4 {" {- h& J- g0 T; \* c5 `
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- charSet = charSet.Replace(""", "");
$ ]: T# F, ]% `' V$ p - }
% J9 L c+ \: i - if (UseUTF8CharSet)
% I) g2 Z; ^' v3 Y8 l - {
* d/ P2 @( O5 E% W J% }: z - if (charSet == null || charSet.Length == 0)0 S, w, y: ^$ ~
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- charSet = "utf-8";+ Z5 o8 b. `( @7 N2 d$ e
- }
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) L. @4 L2 t, a - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
% Z2 Z: R! F) W: O2 J- D$ V& J2 A - strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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- catch (Exception)/ H% |3 d! V! o4 J! A5 d
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- strWebData = "error";6 I6 I1 h+ \7 f( J' M1 i' X& _! }
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- return strWebData;& [7 k1 ^8 l# E7 T6 P
- }
复制代码
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