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EventLogEntryType Enumeration

.NET Framework 4

Specifies the event type of an event log entry.

Namespace:  System.Diagnostics
Assembly:  System (in System.dll)
C#
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public enum EventLogEntryType
Member name Description
Error An error event. This indicates a significant problem the user should know about; usually a loss of functionality or data.
Warning A warning event. This indicates a problem that is not immediately significant, but that may signify conditions that could cause future problems.
Information An information event. This indicates a significant, successful operation.
SuccessAudit A success audit event. This indicates a security event that occurs when an audited access attempt is successful; for example, logging on successfully.
FailureAudit A failure audit event. This indicates a security event that occurs when an audited access attempt fails; for example, a failed attempt to open a file.

The type of an event log entry provides additional information for the entry. Applications set the entry type when they write the entry to the event log.

Each event must be of a single type; the event types cannot be combined for an entry. The Event Viewer uses this type to determine which icon to display in the list view of the log.

The following code example demonstrates how to use the EventLogEntryType class to add information about triggered events to a log file. In this example, a switch statement is used to determine the event type. Each case statement uses the EventLogEntryType to specify the event type, gets the message and ID, and then writes the information to the log.

C#
C++
VB
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// Create an event log instance.
myEventLog = new EventLog(myLog);
// Initialize source property of obtained instance.
myEventLog.Source = mySource;
switch (myIntLog)
{
    case 1:
        // Write an 'Error' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.Error, myID);
        break;
    case 2:
        // Write a 'Warning' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.Warning, myID);
        break;
    case 3:
        // Write an 'Information' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.Information, myID);
        break;
    case 4:
        // Write a 'FailureAudit' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.FailureAudit, myID);
        break;
    case 5:
        // Write a 'SuccessAudit' entry in specified log of event log.
        myEventLog.WriteEntry(myMessage, EventLogEntryType.SuccessAudit, myID);
        break;
    default:
        Console.WriteLine("Error: Failed to create an event in event log.");
        break;
}
Console.WriteLine("A new event in log '{0}' with ID '{1}' "
   + "is successfully written into event log.",
   myEventLog.Log, myID);

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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Failures on 2008 Servers
Problem with Windows 2008 Custom Logs

Only Error and Information Types show on custom logs .
EventLogEntryType.FailureAudit ::: Does not show up , will show up as Information.
EventLogEntryType.SuccessAudit ::: Does not show up , will show up as Information.
EventLogEntryType.Warning ::: Does not show up , will show up as Information.
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