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发表于 2016-2-26 16:23:12
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5 M- z+ e- n, [9 W- E' A缺少一个gethtml,用下面这个:
/ _/ S w! r* G& |2 z# w' 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 - \4 V1 R7 j7 v8 @, I3 V
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- string strWebData = "error";
) E' a1 o; s: F8 f5 Q" Z - try
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- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient " l) j' T# S. G) \ b' i& s0 e
- // 需要注意的:
9 b, F* x: k( x8 f9 H - //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 9 W8 j* j& F/ s7 B% ?
- //这是就要具体问题具体分析比如在头部加入cookie
" M3 i1 r; e( @( r( A/ L: } - // webclient.Headers.Add("Cookie", cookie); & R( Y' z8 H) e" ?9 a/ c; F3 Z/ o9 t
- //这样可能需要一些重载方法。根据需要写就可以了- O& e$ S( i4 X4 ^9 Z1 v
- 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)");
8 E. X$ ?! Q9 o5 ~ - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");8 D! @3 M# i+ L# E% |" {
- //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。 / Z% M. X4 p$ a% D4 h6 W
- myWebClient.Credentials = CredentialCache.DefaultCredentials;
+ ` x# H7 G' ?. ?% W - //如果服务器要验证用户名,密码
9 _: \! W* U8 z- J) W' F8 W' h: M - //NetworkCredential mycred = new NetworkCredential(struser, strpassword); & A' f. [: O: |( q/ I
- //myWebClient.Credentials = mycred;
2 d' ^' }% M$ ~, a1 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) , M8 f$ J/ I6 O
- byte[] myDataBuffer = myWebClient.DownloadData(url);4 }2 m3 R; e8 ^0 V
- strWebData = Encoding.Default.GetString(myDataBuffer);
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- //获取网页字符编码描述信息 9 s5 G" |5 _# ^
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
% ^; @" i+ E' V9 F# k - string webCharSet = charSetMatch.Groups[2].Value;
3 v" v0 Y/ N4 s0 Q0 m0 K4 w9 l* Q - if (charSet == null || charSet == ""). F* |8 @2 h9 F. e9 S
- charSet = webCharSet;4 c; \, f9 s' i+ j: T/ v' L
- if (charSet.Length > 0)& O' p: k, \0 a# L0 m1 S1 A4 `
- {
3 i' }% D$ O1 K7 C, T! T- \0 { - charSet = charSet.Replace(""", "");
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" S" M. R( Y/ v6 w4 ?# x+ F - if (UseUTF8CharSet)
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- if (charSet == null || charSet.Length == 0)# k* r9 o* e9 s/ l; G* k* Q! I( J
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- charSet = "utf-8";
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- }
# L$ K3 U+ S% E8 o; E6 {$ \ - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)! H$ B, I3 v2 X
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);" Q- X8 _! h2 i- w
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- catch (Exception)
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- strWebData = "error";
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3 _& L) B3 T( ~2 |% N5 g# {- return strWebData;0 W! F3 J& z4 a H/ H2 M$ X
- }
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