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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:9 K0 x# W# K6 m7 n! l' T
- 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 2 [ \+ t+ P- n4 v$ F. y" z
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- string strWebData = "error";* ~$ W6 i g" Q Y& ?/ a; J: L
- try: o4 K7 m5 L9 q
- {
" }, Y2 I1 |# T9 x8 T" I3 I - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient 1 ?5 V$ F3 Q, U7 q" O2 o$ E/ K- A
- // 需要注意的: : Q" h! r8 T" c, j7 |/ F9 R( i P, Q
- //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 ; @# N( l/ B0 ]' ?) ^
- //这是就要具体问题具体分析比如在头部加入cookie
% r# S, Q1 z: m+ P1 F, e- b" B% v Z - // webclient.Headers.Add("Cookie", cookie); - O- N4 C/ }# X! J8 U* }1 Q
- //这样可能需要一些重载方法。根据需要写就可以了
5 g; z" n4 P' s4 ?6 @' J - 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)");
2 D0 _ q2 L0 m, q b - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
) Z' @6 L0 T, \5 n n, Z3 L6 K - //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。 ' l- n$ h+ s! X' Y7 D
- myWebClient.Credentials = CredentialCache.DefaultCredentials;
9 F+ U: w6 i! {2 c, `5 }! b, C - //如果服务器要验证用户名,密码 5 g$ s6 O6 N j# v' D, ~6 P
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); ! e, Y1 C% S; l; [6 [
- //myWebClient.Credentials = mycred;
* h: K+ s! {2 w2 m; J, X2 ?9 v - //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) - c4 D0 ?, ^% b
- byte[] myDataBuffer = myWebClient.DownloadData(url);& l+ R, z4 x" A3 h! [2 q* f
- strWebData = Encoding.Default.GetString(myDataBuffer);0 H! k) N' ~, m/ _
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- //获取网页字符编码描述信息 1 d! F/ z# G6 d! I% s0 I6 n* |
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);; C# l! j# o1 C4 B, e
- string webCharSet = charSetMatch.Groups[2].Value;* o/ S J2 e# G' ~" x, U' e
- if (charSet == null || charSet == "")
0 ^7 ]( e! [1 S0 I7 ?1 ^ - charSet = webCharSet;1 S/ x+ ]6 K4 Y1 G% v. O) B
- if (charSet.Length > 0)" S3 g" h0 F8 W4 t. G
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- charSet = charSet.Replace(""", "");
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N0 N7 z: x/ y5 f& M - if (UseUTF8CharSet)% z- B/ b7 `( v( A" s( O
- {
" c% F) L- ?: s4 \- t% o! X% R - if (charSet == null || charSet.Length == 0)
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' [" Z( X0 d4 |- P. f% H" O& R - charSet = "utf-8";0 j! o( f2 y( c! `1 \0 Q; o5 ^
- }
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)6 z6 z$ V2 f% |, j3 Q
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);5 D, i7 } G& y, c
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& S7 H( x+ w. N9 ]: Z$ B - catch (Exception)2 q7 Z4 W8 _) m& o' L
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- strWebData = "error";- G: i8 ~ Z* ~7 Y; ^
- }
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- return strWebData;
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复制代码
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