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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:$ l9 d; z& i6 K# n" V1 E
- 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 5 F# e- V( ~0 c/ k1 v# ~9 q1 _7 e
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- string strWebData = "error";
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, J: d$ \/ f8 C0 e2 l% m- _ - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient
4 T: B7 S7 Y" [0 i - // 需要注意的: Z( N1 M/ \. N0 T6 t) e" t3 s& t
- //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 + E9 V. |0 V3 ^9 E1 P
- //这是就要具体问题具体分析比如在头部加入cookie
4 C3 |9 ]# }- K - // webclient.Headers.Add("Cookie", cookie); 4 { ~+ S6 b: \: v2 N
- //这样可能需要一些重载方法。根据需要写就可以了- a% n8 q" M' R/ w# Y: i+ k& 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)");
: q% M6 j3 Y" ~6 v( _ - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
4 \, [0 g7 D% m% H - //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。
, U' k5 M6 {5 S! F) v- ~! t! X - myWebClient.Credentials = CredentialCache.DefaultCredentials;
& a4 Z# g9 ]; D# x. y - //如果服务器要验证用户名,密码
+ v. v* c# e3 f* v3 w. `7 _ - //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
" O+ _& f$ K: y$ \8 L9 I0 q. X - //myWebClient.Credentials = mycred;
. _2 E& M4 d6 a1 R( S+ n; 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)
- o7 i+ K+ N! J) P' i - byte[] myDataBuffer = myWebClient.DownloadData(url);
7 O6 r# V6 Z5 l" W& f - strWebData = Encoding.Default.GetString(myDataBuffer);
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- //获取网页字符编码描述信息 2 Q$ W% Y5 m- H: m
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
5 F( X+ H. A- @! w$ A( t- m9 D - string webCharSet = charSetMatch.Groups[2].Value;
3 k0 E/ T" z+ n5 u0 Q - if (charSet == null || charSet == "")' z& k- p: c f0 c: B# D' h, S
- charSet = webCharSet;& _: p* W# w/ Y2 S9 p
- if (charSet.Length > 0)
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- charSet = charSet.Replace(""", "");
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- if (UseUTF8CharSet)$ N5 t& G5 f' H$ L
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- if (charSet == null || charSet.Length == 0), ~: r' n8 D' g1 m, e
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- charSet = "utf-8";8 g) w% I, [( _) E5 P/ q
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)+ W* b: ~ p! C' \
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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+ f1 C: G5 q: U2 W - catch (Exception)
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- strWebData = "error";
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- return strWebData;. j) {) L0 d6 o/ Z4 ^1 P
- }
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