public void DeleteEventSource(string eventSourceName)
{
try
{
if (WindowsEventLog.SourceExists(eventSourceName))
{
WindowsEventLog.DeleteEventSource(eventSourceName);
if (WindowsEventLog.SourceExists(eventSourceName) == false)
{
_msg.Length = 0;
_msg.Append("Event Source ");
_msg.Append(eventSourceName);
_msg.Append(" delete succeeded.");
WriteMessageToLog(_msg.ToString());
}
else
{
_msg.Length = 0;
_msg.Append("Event Source ");
_msg.Append(eventSourceName);
_msg.Append(" delete failed.");
WriteMessageToLog(_msg.ToString());
}
}
else
{
_msg.Length = 0;
_msg.Append("Event Source ");
_msg.Append(eventSourceName);
_msg.Append(" not found. No delete needed.");
WriteMessageToLog(_msg.ToString());
}
}
catch (System.Exception ex)
{
_msg.Length = 0;
_msg.Append(AppGlobals.AppMessages.FormatErrorMessage(ex));
_msg.Append(Environment.NewLine);
_msg.Append("Caller must have elevated security permissions (e.g. use Run As Administrator) to create and delete event sources and event logs.");
WriteMessageToLog(_msg.ToString());
AppMessages.DisplayErrorMessage(_msg.ToString(), true);
}
finally
{
;
}
}
public void OutputMessagesToWindowsApplicationEventLog(string eventSourceName,
int numInformationMessagesToWrite,
int numWarningMessagesToWrite,
int numErrorMessagesToWrite)
{
WindowsEventLog eventLog = null;
try
{
if (WindowsEventLog.SourceExists(eventSourceName) == false)
{
WindowsEventLog.CreateEventSource(eventSourceName);
if (WindowsEventLog.SourceExists(eventSourceName))
{
_msg.Length = 0;
_msg.Append("Event Source ");
_msg.Append(eventSourceName);
_msg.Append(" create succeeded.");
WriteMessageToLog(_msg.ToString());
}
else
{
_msg.Length = 0;
_msg.Append("Event Source ");
_msg.Append(eventSourceName);
_msg.Append(" create failed.");
WriteMessageToLog(_msg.ToString());
}
}
else
{
_msg.Length = 0;
_msg.Append("Event Source ");
_msg.Append(eventSourceName);
_msg.Append(" exists.");
WriteMessageToLog(_msg.ToString());
}
eventLog = new WindowsEventLog(WindowsEventLog.EventLogName.Application, ".", eventSourceName);
for (int i = 1; i <= numInformationMessagesToWrite; i++)
{
_msg.Length = 0;
_msg.Append("Message ");
_msg.Append(i.ToString());
_msg.Append(" from test program.");
eventLog.WriteEntry(_msg.ToString(), WindowsEventLog.WindowsEventLogEntryType.Information);
}
for (int i = 1; i <= numWarningMessagesToWrite; i++)
{
_msg.Length = 0;
_msg.Append("Warning message ");
_msg.Append(i.ToString());
_msg.Append(" from test program.");
eventLog.WriteEntry(_msg.ToString(), WindowsEventLog.WindowsEventLogEntryType.Warning);
}
for (int i = 1; i <= numErrorMessagesToWrite; i++)
{
_msg.Length = 0;
_msg.Append("Error message ");
_msg.Append(i.ToString());
_msg.Append(" from test program.");
eventLog.WriteEntry(_msg.ToString(), WindowsEventLog.WindowsEventLogEntryType.Error);
}
_msg.Length = 0;
_msg.Append("Number of event log messages written = ");
_msg.Append((numInformationMessagesToWrite + numWarningMessagesToWrite + numErrorMessagesToWrite).ToString("#,##0"));
WriteMessageToLog(_msg.ToString());
}
catch (System.Exception ex)
{
_msg.Length = 0;
_msg.Append(AppGlobals.AppMessages.FormatErrorMessage(ex));
_msg.Append(Environment.NewLine);
_msg.Append("Caller must have elevated security permissions (e.g. use Run As Administrator) to create and delete event sources and event logs.");
WriteMessageToLog(_msg.ToString());
AppMessages.DisplayErrorMessage(_msg.ToString(), true);
}
finally
{
;
}
}
//NOTE: TestprogSystemObjects must have appManifest with line to request Administrator mode to run.
// DO NOT USE THIS APPROACH IN A SHIPPING APPLICATION.
// Try to reister the event source at application setup time.
private static void RegisterEventLogSources()
{
StringBuilder msg = new StringBuilder();
//check if the event source is registered
//if not, register it and prompt user to restart the application
//if it does, continue with the app start
try
{
string logName = AppConfig.GetStringValueFromConfigFile("WindowsEventLog", "Application");
string machineName = AppConfig.GetStringValueFromConfigFile("WindowsEventLogMachineName", ".");
string eventSourceName = AppConfig.GetStringValueFromConfigFile("WindowsEventLogEventSource", "PFApps");
string eventSourceInitializerApp = AppConfig.GetStringValueFromConfigFile("EventSourceInitializer", string.Empty);
string currentWorkingDirectory = AppConfig.GetStringValueFromConfigFile("EventSourceInitializerWorkingDirectory", string.Empty);
if (currentWorkingDirectory.Length == 0)
{
currentWorkingDirectory = Environment.CurrentDirectory;
}
if (WindowsEventLog.SourceExists(eventSourceName, machineName) == false)
{
WindowsEventLog.EventSourceInitializer = eventSourceInitializerApp;
WindowsEventLog.CurrentWorkingDirectory = currentWorkingDirectory;
int result = WindowsEventLog.RegisterEventSource(logName, machineName, eventSourceName);
msg.Length = 0;
if (result == 0)
{
msg.Append(eventSourceName);
msg.Append(" Windows Event Log event source name successfully registered.");
if (WindowsEventLog.OutputMessages.Length > 0)
{
msg.Append("\r\n");
msg.Append(WindowsEventLog.OutputMessages);
}
AppMessages.DisplayInfoMessage(msg.ToString());
}
else
{
msg.Append("Unable to register ");
msg.Append(eventSourceName);
msg.Append(" Windows Event Log event source name. Application event log write requests, if any, will be ignored.");
if (WindowsEventLog.OutputMessages.Length > 0)
{
msg.Append("\r\n");
msg.Append(WindowsEventLog.OutputMessages);
}
if (WindowsEventLog.ErrorMessages.Length > 0)
{
msg.Append("\r\n");
msg.Append(WindowsEventLog.ErrorMessages);
}
AppMessages.DisplayWarningMessage(msg.ToString());
}
}
}
catch (System.Exception ex)
{
string errMsg = "Attempt to set event source name for windows log messages failed with following error: ";
AppMessages.DisplayErrorMessage(errMsg + ex.Message);
}
finally
{
;
}
}
