C # Network Operations classes

Class h{public static string Getpro (Htmlnode node, string proname) {return node.    Getattributevalue (Proname, "");        } public static Htmlnodecollection Parse (String htm,string XPath) {var doc = new HTMLDocument (); Doc.        loadhtml (HTM); return Doc.    Documentnode.selectnodes (XPath); } public static htmlnode[] Contains (htmlnodecollection collection,string key,string value) {var list = new L        Ist

Public class U

{public static matchcollection Getmidvalue (string begin, String end, string html) {Regex reg = new Regex ("( ? <= ("+ Begin +")) [. \\s\\s]*? (? = ("+ End +")) ", Regexoptions.multiline |        Regexoptions.singleline); Return Reg.    Matches (HTML); } static public string GetValue (String str, string start, String end) {Regex RG = new Regex ("? <= (" + STA RT + ")) [. \\s\\s]*? (? = ("+ End +")) ", Regexoptions.multiline |        Regexoptions.singleline); Return RG. Match (str).    Value; } static public string nohtml (string htmlstring)//Remove HTML tag {//delete script htmlstring = Regex.Replace (htmlst        Ring, @ "<script[^>]*?>.*?</script>", "", regexoptions.ignorecase); Delete html htmlstring = Regex.Replace (htmlstring, @ "< (. [        ^>]*) > "," ", regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "([\ r]) [\s]+", "", regexoptions.ignorecase); htmlstring = Regex.Replace (htmlstring, @ "-", "", Regexoptions.igNorecase);        htmlstring = Regex.Replace (htmlstring, @ "<!--. *", "", regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "& (quot| #34);", "\" ", regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "& (amp| #38);", "&", Regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "& (lt| #60);", "<", regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "& (gt| #62);", ">", Regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "& (nbsp| #160);", "", regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "& (iexcl| #161);", "\xa1", regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "& (cent| #162);", "\xa2", regexoptions.ignorecase);        htmlstring = Regex.Replace (htmlstring, @ "& (pound| #163);", "\xa3", regexoptions.ignorecase); htmlstring = Regex.Replace (htmlstring, @ "& (copy| #169);", "\xa9", Regexoptions.ignorEcase);        htmlstring = Regex.Replace (htmlstring, @ "(\d+);", "", regexoptions.ignorecase);        Htmlstring.replace ("<", "");        Htmlstring.replace (">", "");        Htmlstring.replace ("\ R", "");    return htmlstring; }}

Public class W

{public static string get (String urlstring) {return Getutf8 (urlstring);    public static string Getutf8 (String urlstring) {return get (urlstring, Encoding.UTF8);    } public static string GETGBK (String urlstring) {return get (urlstring, encoding.getencoding ("GBK"));    } public static string getgb2312 (String urlstring) {return get (urlstring, encoding.getencoding ("gb2312")); public static string Get (String urlstring, Encoding Encoding) {//define local variable HttpWebRequest httpwebreq        Uest = null;        HttpWebResponse httpwebrespones = null;        Stream stream = null; String htmlstring = String.        Empty;        Request page try {HttpWebRequest = WebRequest.Create (urlstring) as HttpWebRequest; }//Handling exception catch (Exception ex) {throw new Exception ("An error occurred while creating the page request!        ", ex); } httpwebrequest.useragent = "mozilla/4.0 (compatible; MSIE 7.0; WindowsNT 5.1;. NET CLR 2.0.50727;        Maxthon 2.0) ";            Gets the return information of the server try {httpwebrespones = (HttpWebResponse) httpwebrequest.getresponse ();        stream = Httpwebrespones.getresponsestream (); }//Handling exception catch (Exception ex) {throw new Exception ("An error occurred while accepting the server's return page!        ", ex);        } StreamReader StreamReader = new StreamReader (stream, encoding);        Read back page try {htmlstring = Streamreader.readtoend (); }//Handling exception catch (Exception ex) {throw new Exception ("An error occurred while reading the page data!        ", ex);        }//Release resource return result Streamreader.close (); Stream.        Close ();    return htmlstring; }///<summary>//provide a way to get pages via the Post method//</summary>//<param name= "urlstring" > Requested url</ param>//<param name= "encoding" > Page use encoding </param>//<param name= "postdatastring" >post data </p aram>//<returns>Gets the page </returns> public static string post (String urlstring, Encoding Encoding, string postdatastring) {        Define local Variables Cookiecontainer Cookiecontainer = new Cookiecontainer ();        HttpWebRequest HttpWebRequest = null;        HttpWebResponse HttpWebResponse = null;        Stream inputstream = null;        Stream outputstream = null;        StreamReader StreamReader = null; String htmlstring = String.        Empty; Convert post data byte[] Postdatabyte = encoding.        GetBytes (postdatastring);        Create a page request try {HttpWebRequest = WebRequest.Create (urlstring) as HttpWebRequest; }//Handling exception catch (Exception ex) {throw new Exception ("An error occurred while creating the page request!        ", ex);        }//Specify the request processing mode Httpwebrequest.method = "POST";        Httpwebrequest.keepalive = false;        Httpwebrequest.contenttype = "application/x-www-form-urlencoded";        Httpwebrequest.cookiecontainer = Cookiecontainer; HttpWebRequest.contentlength = Postdatabyte.length;            Transferring data to the server try {InputStream = Httpwebrequest.getrequeststream ();        Inputstream.write (postdatabyte, 0, postdatabyte.length); }//Handling exception catch (Exception ex) {throw new Exception ("An error occurred while sending the post data!        ", ex);        } finally {inputstream.close ();            }//Accept server return information try {HttpWebResponse = HttpWebRequest.GetResponse () as HttpWebResponse;            OutputStream = Httpwebresponse.getresponsestream ();            StreamReader = new StreamReader (outputstream, encoding);        htmlstring = Streamreader.readtoend (); }//Handling exception catch (Exception ex) {throw new Exception ("An error occurred while accepting the server's return page!        ", ex);        } finally {streamreader.close (); } foreach (Cookie cookie in httpwebresponse.cookies) {Cookiecontainer.add (cookie);    } return htmlstring; }}

C # Network operations class