C # http File download public class (support for breakpoint continuation)

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.Linq;4 usingSystem.Text;5 usingSystem.IO;6 usingSystem.Net;7 8 namespaceXcdownloadfile9 {Ten      Public classDownLoadFile One     { A         /// -         ///Download File Method -         /// the         ///file save path and filename -         ///returns the server file name -         /// -          Public BOOLDeownloadfile (stringstrFileName,stringfile) +         { -             BOOLFlag =false; +             //Open the last downloaded file A             LongSposition =0; at             //instantiating a Stream object - FileStream fstream; -             //determine if the folder you want to download exists -             if(File.exists (strFileName)) -             { -                 //Open the file you want to download inFStream =File.openwrite (strFileName); -                 //get the length that has been downloaded toSposition =fstream.length; + Fstream.seek (sposition, seekorigin.current); -             } the             Else *             { $                 //file is not saved create a filePanax NotoginsengFStream =NewFileStream (strFileName, filemode.create); -Sposition =0; the             } +             Try A             { the                 //Open Network Connection +HttpWebRequest myrequest = (HttpWebRequest) httpwebrequest.create ("http://www.newxing.com/download/"+file); -                 if(Sposition >0) $Myrequest.addrange ((int) sposition);//Set Range value $                 //request to the server, get the response data stream of the server -Stream MyStream =Myrequest.getresponse (). GetResponseStream (); -                 //define one byte of data the                 byte[] Btcontent =New byte[ +]; -                 intIntSize =0;WuyiIntSize = Mystream.read (Btcontent,0, +); the                  while(IntSize >0) -                 { WuFstream.write (Btcontent,0, intSize); -IntSize = Mystream.read (Btcontent,0, +); About                 } $                 //Close the stream - fstream.close (); - mystream.close (); -Flag =true;//return true Download succeeded A             } +             Catch(Exception) the             { - fstream.close (); $Flag =false;//return false Download failed the             } the             returnFlag; the         } the     } -}

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Thank you: http://www.cnblogs.com/skyay/p/3880221.html

C # http File download public class (support for breakpoint continuation)