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发表于 2016-2-26 16:23:12
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+ r3 q1 e0 b8 U缺少一个gethtml,用下面这个:7 |( v" |" V1 O, e, ~" R3 L* I
- 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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0 U/ |6 c7 f: |9 \) K9 _0 B - string strWebData = "error";
7 _9 d# x4 q+ N" s0 f - try
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8 p1 O6 ~3 p/ o - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient
( m* O& ?" {* P& P7 _ - // 需要注意的:
$ k. e0 A6 y, l2 M - //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 7 i/ \9 |3 e7 d& B! S6 M: V
- //这是就要具体问题具体分析比如在头部加入cookie . |0 c9 f! T# b; x
- // webclient.Headers.Add("Cookie", cookie); ( Z# o) ?1 U) |- {" P7 j
- //这样可能需要一些重载方法。根据需要写就可以了+ ]. K: d7 J& R* H( A
- 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)");& j. e( \: \0 e! w% c, }, m
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
5 L# F1 O2 D- j% m; Y3 E. s L6 X - //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。
; |2 C7 p# M N+ d - myWebClient.Credentials = CredentialCache.DefaultCredentials;
" a* f& K& N: \1 @, ? - //如果服务器要验证用户名,密码 & B$ w+ ?% }5 I* D) s4 T9 u
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
' ?/ f" l8 k1 K d - //myWebClient.Credentials = mycred; ) p1 S6 G* Z0 b; P. b, C$ {* ]
- //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) " T) {# C/ R2 p1 N
- byte[] myDataBuffer = myWebClient.DownloadData(url);, |2 B3 a$ _, d% {- u' [
- strWebData = Encoding.Default.GetString(myDataBuffer);
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- //获取网页字符编码描述信息
+ m' P1 I7 a8 ?4 n5 p - Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);( t+ C& j$ Y+ U2 e" Z( l
- string webCharSet = charSetMatch.Groups[2].Value;# T$ W) L$ y7 P; s. F! E
- if (charSet == null || charSet == "")
. y/ B0 h6 E4 t& q) R, L - charSet = webCharSet;4 A: U0 w5 ]3 _0 T- Y: f
- if (charSet.Length > 0)' @, p* I8 L, R- d; k O- r
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- charSet = charSet.Replace(""", "");4 H! n8 Z2 }( i
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- if (UseUTF8CharSet)
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- if (charSet == null || charSet.Length == 0)
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- charSet = "utf-8";* T+ t3 U( x( L# i3 n) D
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- }
5 A3 B0 W2 p9 _; n - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)2 l& x- A% v+ a
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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- catch (Exception)
# K9 k& p3 }6 ]8 ~ - {
/ @7 p, j, G5 v; y+ a% ] - strWebData = "error";) ?$ N9 v* p0 Z: n: r2 ~
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! v/ c- ~4 M$ x& Y' q3 q- return strWebData;6 Q2 Q+ e6 R! c$ f& n. f" w) V: ^
- }
复制代码
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