In a C# console application, is there a smart way to have console output mirrored to a text file?
Currently I am just passing the same string to both Console.WriteLine
and InstanceOfStreamWriter.WriteLine
in a log method.
This may be some kind of more work, but I would go the other way round.
Instantiate a TraceListener
for the console and one for the log file; thereafter use Trace.Write
statements in your code instead of Console.Write
. It becomes easier afterwards to remove the log, or the console output, or to attach another logging mechanism.
static void Main(string[] args)
{
Trace.Listeners.Clear();
TextWriterTraceListener twtl = new TextWriterTraceListener(Path.Combine(Path.GetTempPath(), AppDomain.CurrentDomain.FriendlyName));
twtl.Name = "TextLogger";
twtl.TraceOutputOptions = TraceOptions.ThreadId | TraceOptions.DateTime;
ConsoleTraceListener ctl = new ConsoleTraceListener(false);
ctl.TraceOutputOptions = TraceOptions.DateTime;
Trace.Listeners.Add(twtl);
Trace.Listeners.Add(ctl);
Trace.AutoFlush = true;
Trace.WriteLine("The first line to be in the logfile and on the console.");
}
As far as I can recall, you can define the listeners in the application configuration making it possible to activate or deactivate the logging without touching the build.