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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:0 Q" W" J4 g4 n, _3 m _8 u/ V* ?
- 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 5 u6 ]: H/ m# ~
- {
# x/ t# h# w7 b g - string strWebData = "error";
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- {
d% s P# m. u( e0 N p - WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient 3 p3 Z8 T" ~1 u( @' j
- // 需要注意的: ) Q9 Z u7 Y3 J: l0 m) v2 h& ~( 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 # {5 Z6 N* ]+ W4 u$ x1 s9 k
- //这是就要具体问题具体分析比如在头部加入cookie & a# Q% x: S' {$ |; s3 R0 v
- // webclient.Headers.Add("Cookie", cookie);
5 y c+ y; n; K0 K - //这样可能需要一些重载方法。根据需要写就可以了
! ^! q' k2 S1 ?3 a8 Y; u. L - 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 P: K* E6 [7 ]- A! K4 C
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
: [1 ~3 p( m0 m! \! t - //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。
. G7 M3 a4 W j0 h8 l - myWebClient.Credentials = CredentialCache.DefaultCredentials;* m5 T0 V- y! {3 Z
- //如果服务器要验证用户名,密码 % e4 P: z) T8 m4 ^
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
`5 p! T( I- M - //myWebClient.Credentials = mycred;
4 f- Z- i! G3 X - //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)
+ p% b6 o9 I+ s5 h - byte[] myDataBuffer = myWebClient.DownloadData(url);
7 }9 s/ f( A# s2 o) X - strWebData = Encoding.Default.GetString(myDataBuffer);
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$ m5 a$ Z) z. H; K- //获取网页字符编码描述信息 ) }# c) Q: {8 J2 o# h( |
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);8 ?+ R5 k/ l( p" [ B
- string webCharSet = charSetMatch.Groups[2].Value;; ~3 `3 j* q9 I2 n* d/ f
- if (charSet == null || charSet == "")1 Y! m& E6 G) B* |: {! o. o6 t
- charSet = webCharSet;
& }9 [% u: p5 t* I, e( ?5 | - if (charSet.Length > 0)
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- charSet = charSet.Replace(""", "");
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- if (UseUTF8CharSet)) F# U0 F a; x( F( [' k8 k
- {
& U2 J4 r' z7 [& w! @ - if (charSet == null || charSet.Length == 0)
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- charSet = "utf-8";
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
8 l/ S, d" M4 B6 Z: h2 C! z' o1 T - strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);! K$ m6 ]% R: N8 Q- i* {( ?
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' X% h3 _2 U& D0 S# E8 C - catch (Exception)
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- strWebData = "error";
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- return strWebData;
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复制代码 ! |+ @$ \% K5 C4 |
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