jonwagner
commented
9 years ago ESP just passes the values to the .NET Framework EventSource.WriteEvent. For efficiency, the message template is sent once over the event stream and the parameters are sent in a payload.
From the framework documentation for EventAttribute.Message, it doesn't look like EventSource supports format strings.
https://msdn.microsoft.com/EN-US/library/hh393455(v=VS.110,d=hv.2).aspx
Here's a stackoverflow article that explains it:
http://stackoverflow.com/questions/23574861/escape-characters-in-etw-format-strings
But sometimes you just need formatting, so...
1) You can add trace rules like:
2) or coming in 3.0.4 (probably this weekend), you can specify the format as part of a TraceAs attribute on the parameter:
public interface IHaveMessageFormatting
{
[Event(1, Message = "Job '{0}'",
Level = EventLevel.Informational, Opcode = EventOpcode.Start)]
void StartJobManually([TraceAs(Format="{0:u}")]DateTime startTime);
}Happy logging!
gsteinbacher
I have a method called...
[Event(1, Message = "Job '{0}' has started manually at {1:u}", Level = EventLevel.Informational, Opcode = EventOpcode.Start)] public abstract void StartJobManually(string jobName, DateTime startTime);
When I execute the code the string that gets logged is "Job 'Transport Person' has started manually at {1:u}" (Notice the second parameter is not included). Is this something that just isn't supported or am I doing something wrong?