Thanks Peter,
I successfully used [DLLImport] with entry points of OpenBackupEventLog,
GetNumberOfEventLogRecords and CloseEventLog. When it comes to
ReadEventLog, my (failing) code is as follows:
// create reference to ReadEventLog in advapi32.dll
[DllImport("advapi32.dll", EntryPoint="ReadEventLog")]
public static extern bool ReadEventLog(
int iBackupLogRef,
int iReadFlags,
int iRecordOffset,
[MarshalAs(UnmanagedType.LPArray)] byte[] lpBuffer,
int iNumberOfBytesToRead,
out int pnBytesRead,
out int pnMinNumberOfBytesNeeded);
// call ReadEventLog in advapi32.dll
bool success = ReadEventLog(
iBackupLogRetValue,
EVENTLOG_SEQUENTIAL_READ,
iRecordOffset,
myByteArray,
myByteArray.Length,
out iBytesRead,
out iMinNumberOfBytesNeeded);
// output some data
string strByteArrayAsString = System.Text.ASCIIEncoding.ASCII.GetString
(myByteArray);
System.Console.WriteLine("strByteArrayAsString = " + strByteArrayAsString);
Unfortunately, the boolean "success" is always false and myByteArray is
always empty. Can you see anything obviously wrong?
Regards
Pete
On Fri, 22 Apr 2005 10:07:20 -0400, Peter Ritchie
<[EMAIL PROTECTED]> wrote:
>I think you'll have to use PInvoke and OpenBackupEventLog.
>
>[DllImport("advapi32.dll", EntryPoint="OpenBackupEventLog")] public static
>extern int OpenBackupEventLogA(string lpUNCServerName, string lpFileName)
>
>I believe the log name that you would use with EventLog is "Backup of
>application", or something of that nature.
>
>I haven't tried it; so, I don't knof if it will even work. You may have to
>avoid EventLog altogether.
>
>Let us know if that works.
>
>-- Peter
>http://www.peterRitchie.com/
>
>On Fri, 22 Apr 2005 06:07:40 -0400, Pete Lutwyche
><[EMAIL PROTECTED]> wrote:
>
>>I've seen lots of examples where the System.Diagnostics.EventLog class is
>>used to read from the current Application, Security or System log on a
>>machine.
>>
>>What I need to do is loop over several hundred saved log files (*.evt file
>>extension, saved in some folder or other) looking for certain information.
>>I wanted to use System.Diagnostics.EventLog to do this, but can't see how.
>>Does anyone have any experience of solving a similar problem?
>
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