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发表于 2016-2-26 16:23:12
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显示全部楼层
/ y! l& `3 O! ^( [0 B1 u+ `4 m) `; v缺少一个gethtml,用下面这个:/ Z& J! N, ^ \
- 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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( g. a0 F! N- [; g - string strWebData = "error";
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- {
; @+ L" m7 k2 s/ p: e& w - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient " N% q7 Q$ Q6 v! _5 e
- // 需要注意的: 2 D( _! m# \/ Y: n; `6 e0 L
- //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 $ `0 E7 f/ v" Y7 P' a, F6 V i
- //这是就要具体问题具体分析比如在头部加入cookie
4 J" \# l7 c) M/ Z5 J* C8 ~0 v - // webclient.Headers.Add("Cookie", cookie); 8 g1 Q1 u" b! R% x
- //这样可能需要一些重载方法。根据需要写就可以了- v8 ~, H7 h, N# A ^1 p( c5 k
- 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)");
3 Y' X h5 L* p7 ]: U7 ` - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
4 [- q, p0 p* g W: n" ] - //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。
/ W4 U- f8 O8 N: y9 {1 e - myWebClient.Credentials = CredentialCache.DefaultCredentials;
/ p( R2 @4 S/ _* K5 ~; [) A - //如果服务器要验证用户名,密码
* o }) j! ^6 Q. O G. p; G+ ] - //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
! @) B$ |/ k* }+ x3 c - //myWebClient.Credentials = mycred;
* t! T. ^& c5 n3 E9 U, G - //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)
; s- @" e, A/ B3 e" Z) a/ Z - byte[] myDataBuffer = myWebClient.DownloadData(url);6 S7 [7 }9 U1 J4 i
- strWebData = Encoding.Default.GetString(myDataBuffer);
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9 T5 }5 t4 [1 @* E& G+ C: Y- //获取网页字符编码描述信息 4 Q: c9 ]& v, R9 f. {
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline); I; j! e/ f. k$ W$ @
- string webCharSet = charSetMatch.Groups[2].Value;4 k( B/ ^* `; M5 L, ?
- if (charSet == null || charSet == "")( T; l& C. \% _* ~1 L \) U
- charSet = webCharSet;
a! u) A. V' z; v/ p& Y! u - if (charSet.Length > 0)" J2 M( a( I/ R! a
- {
. E, E0 l0 p6 y% e - charSet = charSet.Replace(""", "");
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$ n5 |% f+ l7 }: | - if (UseUTF8CharSet)# I# E' C+ }( W1 l
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- if (charSet == null || charSet.Length == 0)
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- charSet = "utf-8";6 {, P) @! H" L% T) [0 b& J2 Z$ y
- }
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default); z0 \/ K1 I J
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);$ Z7 }; |6 a" n, h+ y! u" @* Y& R6 \
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- catch (Exception)
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0 s+ D: d. p0 b4 ^. r - strWebData = "error";& h( c0 O/ K6 O8 Z! O
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- . l7 m1 |, B3 Z2 t. {+ q' L5 Y. L
- return strWebData;' l- o; B+ _, a% L0 n
- }
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