|
|
发表于 2016-2-26 16:23:12
|
显示全部楼层
8 W! R/ [3 i; n( H/ `% Z$ m
缺少一个gethtml,用下面这个:2 j5 N: [" e5 C$ y4 l* `( z7 H
- 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
' ~* F% P7 A& {# d/ l8 G - {+ g, ^! ^" ]- R$ ]# l1 q" y2 O8 S
- string strWebData = "error";
5 ^% L* T: Z0 R. i9 Z. o - try
1 ?0 ?0 v2 z; Q+ J4 j' ^. a - {( W# I; k/ V* i( L# v) s, L
- WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient
, {. v! P P% P - // 需要注意的: ( R; G- Y* J; g7 P# D0 b5 Q" Z
- //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 # ?. t9 r+ l6 h
- //这是就要具体问题具体分析比如在头部加入cookie 8 Z$ |2 @5 S7 C8 h" b) X
- // webclient.Headers.Add("Cookie", cookie); $ W" j" Z! e* d1 }9 p
- //这样可能需要一些重载方法。根据需要写就可以了. z- D6 |+ Z) S& |& p `# ]
- 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)");; N- q/ `/ D3 O6 s
- //myWebClient.Headers.Add("User-agent", "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");% W6 Z+ [8 r) {' `
- //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。
5 R! O! A6 Z1 u- s - myWebClient.Credentials = CredentialCache.DefaultCredentials;6 _/ e- T0 U( }: V
- //如果服务器要验证用户名,密码 8 P) @ L$ j: x8 @+ |, t
- //NetworkCredential mycred = new NetworkCredential(struser, strpassword);
$ E# B& C7 R" _& l& H5 @ - //myWebClient.Credentials = mycred; 1 }# s+ l8 S% j; d2 r8 {6 W U% d
- //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) ( L9 M$ l* c% |+ U$ L* _
- byte[] myDataBuffer = myWebClient.DownloadData(url);4 h! b* i5 K3 H- o8 \* p3 Z1 u
- strWebData = Encoding.Default.GetString(myDataBuffer); g, U+ K, b P6 U4 X& q% }- S u
|% `/ U4 Z0 l% t. X- //获取网页字符编码描述信息 2 j( {# I; ], B
- Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)"", RegexOptions.IgnoreCase | RegexOptions.Multiline);
8 x( @2 M8 T! ~( D" T - string webCharSet = charSetMatch.Groups[2].Value;
5 g: g/ \4 {! V' a - if (charSet == null || charSet == ""); q: p8 r5 h3 x1 a* ~
- charSet = webCharSet;& S* C9 y4 A" c$ W( G( d
- if (charSet.Length > 0)
8 v) ]) y) Z6 Y2 R - {6 ?6 H$ `: P1 j) A. h
- charSet = charSet.Replace(""", "");
# E, T+ q' l E - }
7 c( {7 r; e$ `% g - if (UseUTF8CharSet)
3 L1 C7 d/ M/ m' T" t9 K6 w: N - {1 i! M2 ~; g6 u9 W1 j3 y! N, N
- if (charSet == null || charSet.Length == 0)
8 {& P* D& q5 z8 X+ h, C8 V h6 Z - {
t: d8 T! {+ @1 e! r7 v1 O - charSet = "utf-8";
r/ {8 I- Y, z7 k9 ^1 [* }, T - }9 R0 x- G$ J* Y1 f" O7 a, d& {' }6 H9 h
- }
( A/ m" }" K) l% X1 t - if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)/ R9 o2 j- C* m8 Y! k5 Q9 ^; I
- strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);/ J0 q U8 J% Q' j* k* L
$ z- n4 Y, ^7 }2 l+ P% g0 {- }
) P+ v5 |7 T1 _- y; b6 W - catch (Exception)' d$ u; f4 ^8 g1 E8 o! F% h M' z
- {% [! } a. Q' T: d6 {, K
- strWebData = "error";. ], X% X: u6 G5 O" a7 A
- }
; x3 e; S8 h5 {8 ^) U
9 `& p) Z0 S5 S- return strWebData;( Q" w/ J2 Y! o( j* @+ y V
- }
复制代码 - V$ D7 R- w5 s
8 V# ^! A" Z8 h: H8 `( L |
|