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发表于 2016-2-26 16:23:12
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- L8 Q% Y5 e8 x7 h( a" A3 z% R缺少一个gethtml,用下面这个:
( A+ i6 C$ u7 M- 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
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- string strWebData = "error";
( _. O) B1 F2 L- W& l, F - try
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- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient
# \- r6 L# s% i" F1 P - // 需要注意的: - Q( D% f1 M! o- `; x3 I5 F N7 G/ y
- //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 - F! d7 [& E4 @+ z. b+ _
- //这是就要具体问题具体分析比如在头部加入cookie 4 D* C5 b2 J0 ?: V {; @ S
- // webclient.Headers.Add("Cookie", cookie);
9 S- n3 p# C9 U- l5 c' P2 N& w! ] - //这样可能需要一些重载方法。根据需要写就可以了8 {0 A, f' Q2 C& N% D+ 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)");# l7 ?5 |3 z6 q, N
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
% N% g5 K8 D# p - //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。
% ?7 a0 T; D/ a& s - myWebClient.Credentials = CredentialCache.DefaultCredentials;- _1 `# `; h: W! d6 _* F8 j
- //如果服务器要验证用户名,密码 1 a8 i1 R2 k& W' ~: u
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); ; D8 W- R" S( M- X8 d
- //myWebClient.Credentials = mycred; 3 I- h. q* @4 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) ( c0 Y5 U: |- `; w& L6 T: a3 f
- byte[] myDataBuffer = myWebClient.DownloadData(url);7 k3 r+ c0 y4 |; M% n f) D
- strWebData = Encoding.Default.GetString(myDataBuffer);
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- //获取网页字符编码描述信息 H R* v6 m: V6 d: H+ i
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
' g8 m+ g5 {( l5 l - string webCharSet = charSetMatch.Groups[2].Value;
2 _7 S1 s9 T- A9 F* L( I% a- M - if (charSet == null || charSet == "")
2 d9 L8 W$ x% e( f m) G w, { - charSet = webCharSet;
1 q1 J& Q% N/ M& d4 q V. G3 x$ O - if (charSet.Length > 0)$ ?- z8 N+ ?) N1 B8 V I6 I
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- charSet = charSet.Replace(""", "");" _8 |# x. a, @& S3 y- U
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- if (UseUTF8CharSet)6 u; g' | B8 q2 E: J
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- if (charSet == null || charSet.Length == 0)0 ?/ k# j+ ?, c7 v
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- charSet = "utf-8";4 Y2 @8 o& r9 E' f' l _
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- }
( ^7 a, y' o( m; ?( u - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
5 E' ^2 L) x8 s, z - strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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5 [2 a) {% v3 L2 U) c9 U Z - catch (Exception)
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- strWebData = "error";
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2 X5 J2 G6 p# q9 ~- return strWebData;: d/ X7 f! D _: k
- }
复制代码
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