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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 z y! k$ b- | Y6 w! 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 $ n, N$ m! ?! r U3 y4 @
- {
! H# c- M, G# y6 [8 S8 `9 A) G - string strWebData = "error";
S5 E% U |! m$ k$ F - try
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- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient ' I1 ~' ] o8 |) c5 H. z
- // 需要注意的:
% L( o; ], n7 p( }7 S6 V! m - //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 * A$ Z) ?8 i+ l( F0 q2 i
- //这是就要具体问题具体分析比如在头部加入cookie 9 r0 S B( F* R p- t) O& E
- // webclient.Headers.Add("Cookie", cookie);
4 E; S9 Y1 C# q3 q8 ]1 | - //这样可能需要一些重载方法。根据需要写就可以了
2 J& V! |4 P' T - 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)");
, U4 t* }* w# H0 V; u& C - //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");
( s: T5 I6 m, o/ O - //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。 7 V7 Y" ?- J: M! y# `' X3 F
- myWebClient.Credentials = CredentialCache.DefaultCredentials;8 p) a8 Z, {1 k) C
- //如果服务器要验证用户名,密码 ' `3 A: E7 B5 f, n! y8 t3 {0 q
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword); 9 T1 r6 _' J4 o! _
- //myWebClient.Credentials = mycred;
! q; I" [ @- D1 [ - //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) : m8 |9 }) K9 x4 X$ M
- byte[] myDataBuffer = myWebClient.DownloadData(url);
1 v4 q5 e0 _ N5 y - strWebData = Encoding.Default.GetString(myDataBuffer);: g: t( |6 u5 ~- n) f/ @" n" ]
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- //获取网页字符编码描述信息 4 j- m* x: d2 X
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);2 A8 z" U9 D5 ^
- string webCharSet = charSetMatch.Groups[2].Value;
7 {% r' v* t2 }. G) \/ Z O - if (charSet == null || charSet == "")
' y" S. A$ x! [0 b; Z. o - charSet = webCharSet;5 Z" d n% ?+ W' a" p
- if (charSet.Length > 0)" h& Q3 u# ?/ Z3 s" I
- {
) M/ v1 k! |% ?# m- G- F - charSet = charSet.Replace(""", "");
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- if (UseUTF8CharSet)
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0 M0 E' L$ r- W! j+ _: n& Q - if (charSet == null || charSet.Length == 0)+ `$ X# h: a7 \. n! e, d% ]
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- charSet = "utf-8";
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- if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)+ M8 C* _) v3 w- L9 M
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);+ m5 p* H: f) k9 M3 ?
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+ q. _" b u0 O' S - catch (Exception)! {( Q% L M3 A' b& K
- {( x9 H6 B5 X; h3 y
- strWebData = "error";
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: X+ A9 {& r+ E c! i- return strWebData;
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复制代码
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