the following filter:
 
<filter type="log4net.Filter.StringMatchFilter">
    <stringToMatch value="database" />
</filter>
 
Look for the substring 'database' in the message text of the event, in the case that text is found the filter is ACCEPTED and the message is logged. OK
 
I want to configure a filter that DENY the substring 'database' (don't log the message)
 
how can I configure that?
 
thanks in advance,
Alexander Wolff

I tried but...

To be concrete, which I need is not to record in the log file (Im using FileAppender in this case) messages which contain string "ORA-00001"

Then I tried with the following filter:

        <filter type="log4net.Filter.StringMatchFilter">
            <acceptOnMatch value="false" />
            <stringToMatch value="ORA-00001" />
        </filter>

But..errors messages with "ORA-00001" are logged :(

Peculiarly, with the following filter:

        <filter type="log4net.Filter.StringMatchFilter">
            <acceptOnMatch value="true" />
            <stringToMatch value="ORA-00001" />
        </filter>
        <filter type="log4net.Filter.DenyAllFilter" />

Only messages that contain the string "ORA-00001" are logged (OK, it's the behavior that I would hope)

And with the following filter:

        <filter type="log4net.Filter.StringMatchFilter">
            <acceptOnMatch value="false" />
            <stringToMatch value="ORA-00001" />
        </filter>
        <filter type="log4net.Filter.DenyAllFilter" />

No message is recorded in log (OK, it's the behavior that I would hope)

Some Idea?