I understand what you want to do now. I didn't look at this line
closley enough:
log.Debug("%newline%newlineGun Level: " & Value & "%newline%newline")
That's not how log4net works. Patterns are evaulated once at start up
and cannot be dynmically inserted into a message. What do you expect to
happen in this case?
log.Debug("%message");
Have you thought about implementing your own ILog that contains
additional logging levels? You could use log4net's unused Alert level
to signal an important event:
log.Alert("Gun Level: " + Value)
The Alert level would know to print out newline sequences before and
after the message:
public void Alert(object message)
{
Logger.Log(
ThisDeclaringType,
Level.Alert,
Environment.NewLine + message + Environment.NewLine,
null);
}
There are a lot of ways to accomplish what you want. A quick hack would
be to extend PatternLayout and have it check for special values:
public class GunLevelPatternLayout : PatternLayout
{
public override void Format(
TextWriter writer, LoggingEvent loggingEvent)
{
string message = loggingEvent.MessageObject as string;
if (message != null &&
message.IndexOf("Gun Level:") >= 0)
{
writer.WriteLine();
base.Format(writer, loggingEvent);
writer.WriteLine();
}
else
{
base.Format(writer, loggingEvent);
}
}
}
While filters aren't necessarily designed for this, you might be able
to write a HighlightStringFilter:
<filter type="HighlightStringMatchFilter">
<regExToMatch value="hello" />
<preHighlight value="<strong>" />
<postHighlight value="</strong>" />
</filter>
that applies the pre and post values to part of a message when it
detects an Accept FilterDecision. Assuming you were logging your output
to some sort of HTML aware appender, the string "hello" would be
translated into
<strong>hello</strong>
before it was written to the appender.
I'll have to think about this more...
--- "Secules, Christopher T [AMSRD-AAR-AEF-A]"
<[EMAIL PROTECTED]> wrote:
> I just downloaded the latest version, but I just took another look at
> what
> you said. I don't want this newline to be added to every line (I
> think that
> is what this configuration will do), I want it to be something that I
> can
> apply to log statements as needed. For instance, I want to log
> statements
> as usual (one entry per line with timestamps), until I get to
> something that
> is important to the reader. At that point, I want to add 1 or 2
> newlines
> before and after it, so that it stands out to the person reading the
> log.
> This, I believe, can only be done in code, right? If
> I put it in the XML config file, it will apply to the entire log.
>
> The (message as Object) parameter of the methods to write to the log
> is
> usually a string, right? Can't I just include an escape character in
> the
> message to signify the insertion of a newline?
