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TraceFormatter Class

Formats trace output using a template, e.g. "{DateTime:u} [{Thread}] {EventType} {Source} {Id}: {Message}{Data}".


Install via NuGet (this package is automatically installed when you install one of the trace listeners):


Uses the StringTemplate.Format function to format trace output using a supplied template and trace information. The formatted event can then be written to the console, a file, or other text-based output.

The following parameters are available in the template string: Data, Data0, EventType, Id, Message, ActivityId, RelatedActivityId, Source, CallStack, UtcDateTime, LogicalOperationStack, ProcessId, ThreadId, Timestamp, MachineName, ProcessName, ThreadName.

Standard .NET formatting can be applied to these values, e.g. "{UtcDateTime:yyyy-MM-dd}" outputs the year, month and day, or "{EventType,12}" outputs the event type padded to width 12.

An example template that generates the same output as ColoredConsoleTraceListener is: "{Source} {EventType}: {Id} : {Message}".

Available Parameters

Parameter Description
{ActivityId} Value of the Trace.CorrelationManager.ActivityId Guid; used to correlate traces relating to the same activity.
{ApplicationName} Name of the current executable, without the extension.
{Callstack} Program call stack; this contains multiple lines of output.
{Data} Array of data objects passed to TraceData() methods, converted to a comma separated list of strings.
{Data0} First or single data object passed to TraceData(), converted to a string.
{DateTime} DateTimeOffset of the log event, in the UTC (+0) timezone.
{EventType} TraceEventType, e.g. Verbose, Information, Warning, Error, Critical, or one of the activity tracing events.
{Id} Id of the event.
{LocalDateTime} DateTimeOffset of the log event, in the local timezone.
{LogicalOperationStack} Stack of objects from Trace.CorrelationManager.StartLogicalOperation(), converted to a comma separated list of strings.
{MachineName} Local computer name, from Environment.MachineName.
{Message} Trace message, or format string with the arguments inserted.
{PrincipalName} Value of Thread.CurrentPrincipal.Identity.Name; the current user's identity.
{ProcessId} Id of the current process, from Process.GetCurrentProcess().
{ProcessName} Name of the current process, from Process.GetCurrentProcess().
{RelatedActivityId} Guid of the activity being transferred to; provides a link between correlated activities.
{Source} Name of the trace source the event is from.
{Thread} The thread name, or if it is null or empty, the thread id; useful for correlating messages from multiple threads.
{ThreadId} The current thread id, from Thread.CurrentThread.
{ThreadName} The current thread name, from Thread.CurrentThread.
{Timestamp} A numeric timestamp.
{WindowsIdentityName} The current Windows account token of the process, from WindowsIdentity.GetCurrent().

Last edited Feb 6 at 5:57 AM by sgryphon, version 6


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