C # Logging to a text file

Add a storage path to the log file in the configuration file:

1 <appsettings>2     <add key= "LogPath" value= "H:\Logs"/>3 </appSettings>

Encapsulates a class of logging:

1    Public classSystemlog2     {3          Public Static voidWritelogline (stringexceptionmessage)4         {5             stringPath =string. Empty;6             Try7             {8Path = configurationmanager.appsettings["LogPath"];9             }Ten             Catch(Exception) One             { APath =@"C:\Temp"; -             } -             if(string. IsNullOrEmpty (path)) thePath =@"C:\Temp"; -             Try -             { -                 //If the log directory does not exist, the directory is created +                 if(!directory.exists (path)) -                 { + directory.createdirectory (path); A                 } at                 stringLogFileName = path +"\ \ Program Log _"+ DateTime.Now.ToString ("yyyy_mm_dd_hh") +". Log"; -StringBuilder logcontents =NewStringBuilder (); - Logcontents.appendline (exceptionmessage); -                 //new If the log file for the day does not exist, otherwise append content -StreamWriter SW =NewStreamWriter (LogFileName,true, System.Text.Encoding.Unicode); -Sw. Write (DateTime.Now.ToString ("YYYY-MM-DD hh:mm:sss") +" "+logcontents.tostring ()); in SW. Flush (); - SW. Close (); to             } +             Catch(Exception) -             { the             } *         } $}

Use the log class in your program:

Systemlog.writelogline ("======> program starts execution ");//Record the time the program started executing

C # Logging to a text file