C# EventInstance構造函數代碼示例

// Ensure that the source has already been registered using
// EventLogInstaller or EventLog.CreateEventSource.

string sourceName = "SampleApplicationSource";
if(EventLog.SourceExists(sourceName))
{
    // Define an informational event with no category.
    // The message identifier corresponds to the message text in the
    // message resource file defined for the source.
    EventInstance myEvent = new EventInstance(UpdateCycleCompleteMsgId, 0);
    
    // Write the event to the event log using the registered source.
    EventLog.WriteEvent(sourceName, myEvent);

    // Reuse the event data instance for another event entry.
    // Set the entry category and message identifiers for
    // the appropriate resource identifiers in the resource files
    // for the registered source.  Set the event type to Warning.

    myEvent.CategoryId = RefreshCategoryMsgId;
    myEvent.EntryType = EventLogEntryType.Warning;
    myEvent.InstanceId = ServerConnectionDownMsgId;

    // Write the event to the event log using the registered source.
    // Insert the machine name into the event message text.
    EventLog.WriteEvent(sourceName, myEvent, Environment.MachineName);
}
else 
{
    Console.WriteLine("Warning - event source {0} not registered", 
        sourceName);
}

// Create the event source if it does not exist.
     string sourceName = "SampleApplicationSource";
     if(!EventLog.SourceExists(sourceName))
     {
         // Call a local method to register the event log source
         // for the event log "myNewLog."  Use the resource file
         // EventLogMsgs.dll in the current directory for message text.

         string messageFile =  String.Format("{0}\\{1}", 
             System.Environment.CurrentDirectory, 
             "EventLogMsgs.dll");

         CreateEventSourceSample1(messageFile);
     }

     // Get the event log corresponding to the existing source.
     string myLogName = EventLog.LogNameFromSourceName(sourceName,".");

     EventLog myEventLog = new EventLog(myLogName, ".", sourceName);

     // Define two audit events.

     // The message identifiers correspond to the message text in the
     // message resource file defined for the source.
     EventInstance myAuditSuccessEvent = new EventInstance(AuditSuccessMsgId, 0, EventLogEntryType.SuccessAudit);
     EventInstance myAuditFailEvent = new EventInstance(AuditFailedMsgId, 0, EventLogEntryType.FailureAudit);

     // Insert the method name into the event log message.
     string [] insertStrings = {"EventLogSamples.WriteEventSample1"};
     
     // Write the events to the event log.

     myEventLog.WriteEvent(myAuditSuccessEvent, insertStrings); 

     // Append binary data to the audit failure event entry.
     byte [] binaryData = { 3, 4, 5, 6 };
     myEventLog.WriteEvent(myAuditFailEvent, binaryData, insertStrings);