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发表于 2016-2-26 16:23:12
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缺少一个gethtml,用下面这个:1 y$ F0 [' K3 ^9 L
- 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 : m5 f4 ^1 i0 ]7 e
- {
7 f: g, {* \0 `* }0 I - string strWebData = "error";. p! Z* U3 V* [# [" i$ v
- try
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/ }. r# n8 Z, U$ i* b, Z9 _ - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient
$ A. D) @# q4 s G - // 需要注意的: , b1 |4 x' ]/ F* c
- //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
, R# l1 e/ T# M - //这是就要具体问题具体分析比如在头部加入cookie 6 S* e4 ?# ]2 n: k) ~4 q
- // webclient.Headers.Add("Cookie", cookie); # |8 A' P U9 D% c. V
- //这样可能需要一些重载方法。根据需要写就可以了5 ]% S8 z7 O1 A. ^6 N; s9 ~
- 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)");
- {0 |1 f8 Z+ s7 i# u# {2 T Y - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");' x7 A7 y5 J- ?: q& c4 i; q
- //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。 ; }. e: \3 \: l5 Q- u4 E, F
- myWebClient.Credentials = CredentialCache.DefaultCredentials; Q8 R! r+ Y+ i1 C0 D# M% R
- //如果服务器要验证用户名,密码 * L4 Y" y6 g# K9 f
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); 4 U/ v" R3 P1 U" P
- //myWebClient.Credentials = mycred;
5 J4 e9 {! G: b: x9 P; E - //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)
" T0 d; {" g5 ]5 \) s, w - byte[] myDataBuffer = myWebClient.DownloadData(url);+ d7 ^' I7 {' A
- strWebData = Encoding.Default.GetString(myDataBuffer);
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6 Q/ \3 J8 c7 D: u5 q p! E- //获取网页字符编码描述信息
$ h$ c( P) D! e( d# g4 ~ A - Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);+ }5 Z& o" e, J8 a- I2 U1 E7 f1 v: Y6 f
- string webCharSet = charSetMatch.Groups[2].Value;
% M5 w4 F5 T0 K7 _1 h - if (charSet == null || charSet == "")
% {: I. q6 x4 i1 K6 E - charSet = webCharSet;) M1 j5 K) m% f# M7 d+ F
- if (charSet.Length > 0)
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- charSet = charSet.Replace(""", "");
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, v: q- a4 m# I$ C2 b - if (UseUTF8CharSet)- Y9 U$ d; H1 \" e s: z2 C1 L
- {
+ U' X- O& L$ n* b9 l- l3 z+ H% s' H - if (charSet == null || charSet.Length == 0); ^3 r9 ?8 \0 V Q3 s
- {
/ F% D* ?! M" A - charSet = "utf-8";
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
% f+ k3 T1 z, v- v2 k' a - strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
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- catch (Exception)/ @: C7 r, D" `) u$ P
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- strWebData = "error";
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: W' N. ^* C I0 y, ^3 I" ]- return strWebData;
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