WinForm Collection website Beautiful picture program---multi-threaded article

Before the collection process, is single-threaded, a picture list, waiting for one by one to finish .... Wasted a lot of time, just today's home bandwidth upgrade, you can use multi-threaded acquisition ....  Overnight to improve the original program. Use multithreading to collect ....

setting Ideas: acquisition Target: http://www.8kmm.com, the list of known URLs (List save), the application of multithreading (thread) to read it, to get the URL can not be repeated (locking lock). Allow   Random Collection!

Put on a beautiful woman first to lift the spirits!

Multithreaded Core code:

1 #regionGlobal variables2         //Thread List3List<thread> threadsllist =NewList<thread>();4         //URL list5list<string> uurls =Newlist<string>();6         //finished list7list<string> okurls =Newlist<string>();8         //number of beautiful pictures successfully obtained9          Public intImgcount =0;Ten #endregion One  A  - //take a diagram Start button event -  Private voidLbtngetwebimgstart_linkclicked (Objectsender, LinkLabelLinkClickedEventArgs e) the         { -lbtngetwebimgstart.enabled =false; - getwebsiteimg (); -         } +  - //Drawing Stop button event +         Private voidLbtngetwebimgstop_linkclicked (Objectsender, LinkLabelLinkClickedEventArgs e) A         { at             Try -             { -                 foreach(Thread tinchthreadsllist) -                 { -                     if(t! =NULL) -                     { in T.abort (); -                     } to                 } +             } -             Catch(Exception ex) the             { *Writelog ("Stop failed:"+Ex. Message); $             }Panax Notoginseng             finally -             { thelbtngetwebimgstart.enabled =true; +             } A         } the  +         /// <summary> -         ///Get Picture Main method $         /// </summary> $         Private voidgetwebsiteimg () -         { -             Try the             { -Imgcount =0;Wuyi okurls.clear (); the uurls.clear (); -Threadsllist.clear ();//First initialize the above Wu                 string[] URLs = TxtUrl.Text.Split (New string[] {"\ r \ n"}, Stringsplitoptions.removeemptyentries);  -Lblc.text =URLs. Length.tostring (CultureInfo.InvariantCulture); AboutUurls =Newlist<string>(URLs); $                  for(inti =0; I <int. Parse (Numthreadud.text); i++)//Looping Create Threads -                 { -Thread T =NewThread (Task); -T.name =i.tostring (); AT.isbackground =true; + Threadsllist.add (t); the T.start (); -                 }  $             } the             Catch(Exception ex) the             { the Writelog (ex. Message); the             }  -         } in  the  the     Public voidTask () About         { the              while(Uurls.count >0) the             { theLblmsg.text =string. Format ("remaining: {0}, accessed: {1}, current number of threads: {2}", Uurls.count, (Okurls.count +1), threadsllist.count); +                 stringURL =GetUrl (); -                 if(url = ="") the                 {Bayi                      Break; the                 } the                 Else -                 { -                     if(gethttpimg (URL) = = $)//only state 200 is normal, gethttpimg is my method of encapsulation, get the Web page, and get all the canonical pictures. the                     { the okurls.add (URL); theLblinfostart.text = (int. Parse (Lblinfostart.text) +1). ToString (CultureInfo.InvariantCulture); the writehtml (txturl.text); -                         if(Lblc.text = = Lblinfostart.text)//determines whether the current quantity is total. the                         { theLblmsg.text ="Complete"; the                         }94                     } the                 } the             } the         }98      About  -         /// <summary>101         ///Thread loads lock to prevent multiple threads from removing the first one from the list at the same time102         /// </summary>103         /// <returns></returns>104          Public stringGetUrl () the         {106             Lock("GETURL")107             {108                 if(Uurls.count >0)109                 { the                     stringURL = uurls[0];111Uurls.removeat (0); the                     returnURL;113                 } the                 Else the                 { the                     return "";117                 }118             }119}

Code super simple, test crawl a few lists, no problem, and so will use it to catch more mm ...

WinForm Collection website Beautiful picture program---multi-threaded article