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发表于 2016-2-26 16:23:12
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+ M$ }% y* e, ^2 v* x! n缺少一个gethtml,用下面这个:7 x) U( o* e! x) t/ | B0 ~
- 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 " h0 h' `% z& p/ o8 R5 u8 M
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- string strWebData = "error";5 k5 i. V6 `: d& [ F7 j4 }, \
- try
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- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient , s' z& U" F1 h# b/ M: G! U
- // 需要注意的:
3 B6 ~% e; P8 V& o5 d' u - //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 % E' }& Y" ?# B) E: Z) Q
- //这是就要具体问题具体分析比如在头部加入cookie ; H+ o, q9 o; Z. u. L; b
- // webclient.Headers.Add("Cookie", cookie);
$ ~" f& ^- i0 | l - //这样可能需要一些重载方法。根据需要写就可以了
# l0 s k! E$ s - 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)");; C6 t: s. g- R( ?5 A
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");) ], H1 F S. z5 {1 c
- //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。 4 s- @6 H( f3 J) M2 y' B4 v
- myWebClient.Credentials = CredentialCache.DefaultCredentials;
/ I5 j- y: h4 U9 \7 M, V0 f - //如果服务器要验证用户名,密码 * U% p5 E# O' c' k
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
! I' C! v4 j+ f% t. t. H' _1 J% x+ L - //myWebClient.Credentials = mycred; ( b3 g' g! `3 a' z8 ^( 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) ) y l1 o% K7 o
- byte[] myDataBuffer = myWebClient.DownloadData(url);! G9 O. H9 ~9 H# ~6 k: F; F
- strWebData = Encoding.Default.GetString(myDataBuffer);
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; o5 n0 ? G7 Q- //获取网页字符编码描述信息 6 z- T }; U5 ?# f2 d
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);* w* T) O& V1 z
- string webCharSet = charSetMatch.Groups[2].Value;7 i- i% [0 e. o% \
- if (charSet == null || charSet == ""), g# b4 f+ f: a5 Q) ], j6 q k' C' f
- charSet = webCharSet;: R2 `. y2 Z( H7 j3 c! v4 X
- if (charSet.Length > 0)' V% e. b8 S1 L
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- charSet = charSet.Replace(""", "");
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9 N3 b' T, x2 `3 y: S: ` - if (UseUTF8CharSet)% }! ?# M) a8 Y) }
- {# M% u" t: s5 h: z2 _
- if (charSet == null || charSet.Length == 0)
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- charSet = "utf-8";! m( K# U8 e7 `! d8 n7 A
- }
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% [: n9 ]: L m P6 ?3 J/ a+ q" ~ - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)5 l) F' C8 o2 ~7 p) W
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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- catch (Exception)
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- strWebData = "error"; ^, X, r; d; _' a& \# P
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- return strWebData;/ L- s! | e/ M" k0 f' [, ^) z3 C
- }
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