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发表于 2016-2-26 16:23:12
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: K. v1 Z# h8 k# M* q缺少一个gethtml,用下面这个:
& e0 y/ _: P9 q2 B3 M7 u- 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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4 z( M: ~( \0 x- U" t3 M2 M - string strWebData = "error";& T+ `8 D$ u( P$ W2 R+ f; z
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- {
7 [2 j2 L- l) }2 V& ~ - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient . x" D% k1 C ?+ y
- // 需要注意的: & m# m' ^; M: U. n; e
- //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 1 B% H. M; p2 d. ^
- //这是就要具体问题具体分析比如在头部加入cookie " H1 G- H1 M! j6 g, V2 I, z
- // webclient.Headers.Add("Cookie", cookie);
6 _/ B6 y9 u9 F. l+ j - //这样可能需要一些重载方法。根据需要写就可以了. [/ b6 Q4 ^7 ]! A9 z
- 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)");
! W( t; T. O7 i+ n: d2 Y. \ - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
3 f. p. A3 k" Z+ @* W - //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。 6 _7 j) A5 Y4 v5 b' e; D3 A
- myWebClient.Credentials = CredentialCache.DefaultCredentials;; V* s" U9 v8 A
- //如果服务器要验证用户名,密码
( [9 X8 i6 o# `8 ^; y) N, [ - //NetworkCredential mycred = new NetworkCredential(struser, strpassword); " S4 y# s( r9 L
- //myWebClient.Credentials = mycred;
" {: k; w* r8 K - //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) + F6 ~) [" {0 ?& I/ k1 V7 K# G
- byte[] myDataBuffer = myWebClient.DownloadData(url);# |$ N5 @* N5 T; A
- strWebData = Encoding.Default.GetString(myDataBuffer);
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9 R5 Q q& w# R, P8 o: f- //获取网页字符编码描述信息 2 n7 l$ d$ U9 p+ f( d
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);$ S+ X' D* f9 S/ t
- string webCharSet = charSetMatch.Groups[2].Value;( d. p; A' g, Q9 X" A2 @ X
- if (charSet == null || charSet == "")
0 D6 W) P. R. m! {) m: d( t" Y, E2 A8 W - charSet = webCharSet;
9 |5 s6 f) T% X7 w7 L0 Q - if (charSet.Length > 0)2 \$ e' e$ ?( m2 s
- {
' o1 ^% n2 Y& r B" L - charSet = charSet.Replace(""", "");
t- T7 B$ U. u - }
' p- h. b* g- w) i$ I$ k - if (UseUTF8CharSet)
5 |3 X8 I1 ~# a! e( u - {4 [: B% i% s& [- f( @
- if (charSet == null || charSet.Length == 0)
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" w9 t' w5 Y8 m: o, @" H2 D - charSet = "utf-8";
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
3 O# ?* b. C+ t! H0 T - strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);+ e, X( j1 w: ~; Q, i; d" K: J
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- }
8 L4 @: W! t0 `" G K: C - catch (Exception)
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! y3 D* B& n0 q6 n9 S, f; W - strWebData = "error";
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* }; }, Q8 ]$ x" z. C( Z/ {$ J- return strWebData;5 v/ I# }: `0 G7 x8 p+ F3 R! @9 o7 ?
- }
复制代码 , C$ e4 V# \ D0 {0 ?+ R. Q
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