dot.NET C# – Write to Windows Event Log

For some special case, you might need to write the log to Windows Event Log,
To kick start, create a Class so that you can alwiz reuse the code when want to write to Event Log. In my case, I’ve created a Class called EventLogHelper:

class EventLogHelper
    {
        public static void writeEventLog(String description)
        {
            String sSource;
            String sLog;

            sSource = "MyService";
            sLog = "Application";

            if (!EventLog.SourceExists(sSource))
            {
                EventLog.CreateEventSource(sSource, sLog);
            }

            EventLog.WriteEntry(sSource, description);
        }

    }

So, from your codes, you just need to call the Helper class whenever you want to log to Event Log:

EventLogHelper.writeEventLog("Testing 123");

For the first timer, you could encounter the following exception:
“The source was not found, but some or all event logs could not be searched. Inaccessible logs: Security.” System.Exception {System.
Security.SecurityException}

If you ecounter the exception above, then you will need to manually create New Event Source Entry in registry.
Do do that , access HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\
For instance, the below screen shots & steps are taken from Windows 7:
(1) Go to run, type regedit
regedit
(2) Windows will prompt ” Do you allow the following program to make changes on this computer?”
Click “yes”
(3) To to this path :
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application
(4) Add New Key
Right Click Application –> New –> Key
(5) Name the new key as “MyService”

(6) Run your application
(7) Check the Event Log
Windows –> Control Panel –> Administrator –> Event Viewer