Share a logging class that can be used by multiple threads.

Haven't written a blog for a long time, today to share a log class of their own, non-original, borrowed from the predecessors of an idea, and then modified.

Log we are required, and now the program is multi-threaded concurrency, log there may be problems, lock? Affect performance. Log4net is too heavyweight, this log is a lightweight gadget.

Don't say much nonsense, look at the source:

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.IO;4 usingSystem.Text;5 6 namespaceGEDU.CourseOnline.Common7 {8     /// <summary>9     ///Log class (multi-threaded version)Ten     /// </summary> One      Public classLoghelper A     { -         Private string_filename; -         Private Staticdictionary<Long,Long> lockdic =Newdictionary<Long,Long>(); the  -         /// <summary>   -         ///Gets or sets the file name -         /// </summary>   +          Public stringFileName -         { +             Get{return_filename;} A             Set{_filename =value;} at         } -  -         /// <summary>   -         ///constructor Function -         /// </summary> -         /// <param name= "FileName" >file full path name</param>   in          PublicLoghelper (stringfileName) -         { to             if(string. IsNullOrEmpty (fileName)) +             { -                 Throw NewException ("filename cannot be empty! "); the             } * Create (fileName); $_filename =FileName;Panax Notoginseng         } -  the         /// <summary>   +         ///Create file path A         /// </summary>   the         /// <param name= "FileName" >file path</param>   +          Public voidCreate (stringfileName) -         { $             varDirectoryPath =Path.getdirectoryname (fileName); $             if(string. IsNullOrEmpty (directorypath)) -             { -                 Throw NewException ("filename Path Error! "); the             } -             if(!directory.exists (directorypath))Wuyi             { the directory.createdirectory (directorypath); -             } Wu         } -  About         /// <summary>   $         ///writing text -         /// </summary>   -         /// <param name= "Content" >text content</param> -         /// <param name= "NewLine" >Line break Marker</param>   A         Private voidWrite (stringContentstringnewLine) +         { the             using(FileStream fs =NewFileStream (_filename, FileMode.OpenOrCreate, FileAccess.ReadWrite, Fileshare.readwrite,8, fileoptions.asynchronous)) -             { $byte[] DataArray = Encoding.UTF8.GetBytes (content +newLine); the                 BOOLFlag =true; the                 LongSlen =dataarray.length; the                 LongLen =0; the                  while(flag) -                 { in                     Try the                     { the                         if(Len >=FS. Length) About                         { the FS. Lock (len, slen); theLockdic[len] =Slen; theFlag =false; +                         } -                         Else the                         {BayiLen =FS. Length; the                         } the                     } -                     Catch(Exception ex) -                     { the                          while(!Lockdic.containskey (len)) the                         { theLen + =Lockdic[len]; the                         } -                     } the                 } the FS. Seek (len, seekorigin.begin); theFs. Write (DataArray,0, dataarray.length);94 FS. Close (); the             } the         } the 98         /// <summary>   About         ///Write file Contents -         /// </summary>  101         /// <param name= "Content" >content</param>  102          Public voidWriteLine (stringcontent)103         {104              This. Write (content, Environment.NewLine); the         }106 107         /// <summary>  108         ///write to file content does not wrap109         /// </summary>   the         /// <param name= "Content" >content</param>  111          Public voidWrite (stringcontent) the         {113              This. Write (Content,""); the         } the     } the}

View Code

Usage:

1 string strpath = HttpContext.Current.Server.MapPath (string. Format ("/log/{0:yyyymmdd}.txt", Datetime.today)); 2 // string strpath = string. Format (@ "D:\log\{0:yyyymmdd}.txt", datetime.today); 3 New Loghelper (strpath); 4 "   Time:" + DateTime.Now);

Please advise if you have any deficiencies.

The

shares a logging class that can be used by multiple threads.