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发表于 2016-2-26 16:23:12
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4 D1 X+ H, ]/ L4 p+ N缺少一个gethtml,用下面这个:' n* Z& L* @2 P
- 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 % u% [% ~3 O, F* f5 t/ m- d- d
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- string strWebData = "error";
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9 e! q, R) W; v6 }& O; z% l: j4 z - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient
2 }. w: _% N: G/ G; O - // 需要注意的:
( ?; g6 h; l+ Q2 U4 F& O - //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
' H$ W2 |6 `& [ x! Y( { - //这是就要具体问题具体分析比如在头部加入cookie
0 A* Y* w9 u+ t - // webclient.Headers.Add("Cookie", cookie); 8 j8 q& s4 X+ i7 c) u) C/ m
- //这样可能需要一些重载方法。根据需要写就可以了
* O2 W. J7 F8 @ - 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)");) ?* v# N% w$ s! ?' R( D
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");: Q S! o u: u" b9 r* t
- //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。
8 r1 W6 r& Y# N. I* j X, c - myWebClient.Credentials = CredentialCache.DefaultCredentials;) Z: |# a. Z9 i/ a5 C y
- //如果服务器要验证用户名,密码 , ^# q2 |. k5 ~) j
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); # g$ g/ b* R" M: ^
- //myWebClient.Credentials = mycred;
U- \( {' b" f, A - //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) % b1 M4 e- L$ }
- byte[] myDataBuffer = myWebClient.DownloadData(url);
; x. m u7 W }6 j- c X - strWebData = Encoding.Default.GetString(myDataBuffer);
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' ]% b7 H, t7 |- //获取网页字符编码描述信息 ( @. c2 p" ` d
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
5 i$ h7 }5 M. c- v2 U - string webCharSet = charSetMatch.Groups[2].Value;
" [- i9 r2 O" l8 b- \/ ^( S. X. f( u - if (charSet == null || charSet == "")6 K( i4 Y f1 D6 H; k7 M: |; }8 j
- charSet = webCharSet;; T% B5 Q7 N1 G7 H6 f1 c; z, ]( h/ n
- if (charSet.Length > 0)( R! A8 U0 x8 Q; w
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- charSet = charSet.Replace(""", "");! |% y7 D8 E3 m1 J) Q% c; k9 X& m
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- if (UseUTF8CharSet)! f) c/ q" v( S( w0 \$ Z
- {
) B: }) R& y z3 K# L - if (charSet == null || charSet.Length == 0)
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@7 w+ c! {' B# G& ~7 [! e: i - charSet = "utf-8";
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! Z* w0 s z) {, L, w/ L - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default) a1 u7 H9 g/ S" P2 G7 ^9 V* V' N
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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- catch (Exception), b$ z8 \, C% S! U9 w
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- strWebData = "error";7 }: @2 r! u. w F. o8 F7 d/ \; n
- }
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- return strWebData;
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复制代码 8 T( _$ {/ @7 R# x: K' v4 f; N" b
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