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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 v) ?/ E2 M; S% H) r& 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 : H) }6 k$ |" D8 [( L4 Q( U
- {
* P4 ~0 ]- ?2 r L7 e- s - string strWebData = "error";
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- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient
! F4 K) ^- X0 n3 P% Q - // 需要注意的:
( N2 r9 x) ?/ p. z; N) G5 w - //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 D s Q* N! D. F5 |' u
- //这是就要具体问题具体分析比如在头部加入cookie ; f& N5 t3 b# H( v. Y% x# M
- // webclient.Headers.Add("Cookie", cookie); ) `* l; X5 l! ]2 W% u& B
- //这样可能需要一些重载方法。根据需要写就可以了0 K) y9 g- Y$ ^5 ^
- 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)");
+ H# x) x1 e7 x$ [9 y - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
) X% V0 f1 a, t# x- _6 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。 $ S2 c! ?5 k8 q" q$ O6 f
- myWebClient.Credentials = CredentialCache.DefaultCredentials;
, V- {( v1 z" j& l! q/ ^ - //如果服务器要验证用户名,密码 ! u0 I5 T8 D& w, u9 R& t6 t( ]/ }
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); 9 I% j* o- v. f) ?3 Q( B
- //myWebClient.Credentials = mycred; : n3 V5 |2 J& Y( h! [# _: M1 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)
9 b9 Q# D6 c6 M, F - byte[] myDataBuffer = myWebClient.DownloadData(url);
4 j- ^3 n& Y( V" Q _ - strWebData = Encoding.Default.GetString(myDataBuffer);
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- //获取网页字符编码描述信息 " X: i$ F1 X6 m4 r2 c% o: }( }
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
# J2 @* p8 S+ f4 y/ h% ^9 w - string webCharSet = charSetMatch.Groups[2].Value;/ [$ |, M; `/ ]
- if (charSet == null || charSet == "")1 l& G+ [3 H: w5 M) Z% O
- charSet = webCharSet;
2 ~; S l0 T# P {4 J5 v - if (charSet.Length > 0)
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- charSet = charSet.Replace(""", "");( i* W& K! A! y8 j% {
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- if (UseUTF8CharSet)1 g* X/ i9 \* [0 @5 e% ~/ p
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- if (charSet == null || charSet.Length == 0)
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& O3 [, C5 i8 R F) G) r" |: D - charSet = "utf-8";
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)) R4 I2 N% O' f2 k- C
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);7 f+ o' S$ y8 ~ V8 t- v1 V$ X
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- catch (Exception). |9 B! l* k* ~
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- strWebData = "error";
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- return strWebData;
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复制代码 9 m% b* v) C; Z R
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