Trace.Listeners.Add(new ConsoleTraceListener());
Or you can specify listeners you want to use in the
system.diagnostics section of your .config file:<listeners>
<add initializedata="MyEventLog"
name="EventLogListener"
type="System.Diagnostics.EventLogTraceListener">
</add>
</listeners>
If you use the .config file it would be nice to extend the xml tag by custom attributes. To do so you need to override the
GetSupportedAttributes() method in your TraceListener-implementation. In this method you just need to return the names of the custom attributes you want to use in the .config file. For example if you have a custom trace listener that separates trace entries by a delimiter:protected override string[] GetSupportedAttributes() {
return new string[] { "delimiter" };
}
Now you can specify the delimiter in you .config file:<listeners>
<add delimiter=":"
initializedata="delimitedOutput.txt"
name="delimitedListener"
type="MyNamespace.MyDelimitedTraceListener">
</add>
</listeners>
To get the value of the custom attribute you can use the Attributes property of the base class in your TraceListener implementation:foreach (DictionaryEntry de in this.Attributes) {
if (de.Key.ToString().ToLower() == "delimiter") {
source = de.Value.ToString();
}
}
