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发表于 2016-2-26 16:23:12
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. y5 h5 [, t7 T3 x9 W) y缺少一个gethtml,用下面这个:; r' Y' V2 [. 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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- string strWebData = "error";
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- {
7 Q2 A; A6 `' L) |$ n) _2 _4 k' t - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient 4 |# b5 E& ~: Q
- // 需要注意的: ) B8 M" X. 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 % W1 \1 t7 h/ w O7 H
- //这是就要具体问题具体分析比如在头部加入cookie
1 ~7 \9 U; e; t - // webclient.Headers.Add("Cookie", cookie); 7 Y9 e1 D0 v5 L% S3 W4 ]
- //这样可能需要一些重载方法。根据需要写就可以了- O9 C1 f. D5 Y7 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)"); P4 ?3 O" `1 D8 l0 x
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
( \" Q2 S# u% K5 q& {$ f - //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。
. @! S5 ]9 y! T J5 I l7 t1 N - myWebClient.Credentials = CredentialCache.DefaultCredentials;
( x- g; |, u7 i, j* d - //如果服务器要验证用户名,密码 , X( Z3 z# R7 {8 c1 w) p: U0 o
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
4 E" u3 x/ V" ~0 q/ _, L/ I: b5 c - //myWebClient.Credentials = mycred;
% k# @- H# \. g/ s - //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) ( L8 O* i2 l% N" O9 v5 J
- byte[] myDataBuffer = myWebClient.DownloadData(url);
7 G) {; Q- `. K& `$ S! W1 D - strWebData = Encoding.Default.GetString(myDataBuffer);. d5 X" j3 e) P: N c& j8 I
+ r. Q9 j: a2 ~4 G1 \- //获取网页字符编码描述信息
8 l: @( q% g* k - Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);$ o! g0 C* h' n# i- `
- string webCharSet = charSetMatch.Groups[2].Value;
! l! Z" V: B* U& |! e* `( }% Q - if (charSet == null || charSet == "")7 {3 ^6 T6 c1 ~! B( v9 l2 X& ^9 v
- charSet = webCharSet;
) f/ r) o4 j' @& G1 D - if (charSet.Length > 0)
% d) ?0 h( l+ }5 D) M9 R - {
9 t; I! s9 _8 y$ |: @: \! j' a - charSet = charSet.Replace(""", "");5 e/ G0 g6 M1 P$ n. O% W
- }
8 a& X6 q" U0 ^- [: U - if (UseUTF8CharSet). M7 d! j: `; C
- {
( ^: ~. [5 p/ p6 W - if (charSet == null || charSet.Length == 0)
& j3 \4 _# ] K& I" i - {
4 ]2 E' c" g8 K" N: r - charSet = "utf-8";
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- }
9 g' p$ K6 K0 a& Q6 L - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
4 p; V+ Q, ^6 G+ `6 d3 B - strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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- catch (Exception): G# y7 _7 R: W8 p9 F4 p2 A8 Q+ x
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- strWebData = "error";, q# X* z- m# ?( a
- }
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; m) h6 u# j& w9 N6 W- return strWebData;
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