TraceSource.TraceEvent Method (TraceEventType, Int32, String)


Writes a trace event message to the trace listeners in the Listeners collection using the specified event type, event identifier, and message.

Namespace:   System.Diagnostics
Assembly:  System (in System.dll)

member TraceEvent : 
        eventType:TraceEventType *
        id:int *
        message:string -> unit


Type: System.Diagnostics.TraceEventType

One of the enumeration values that specifies the event type of the trace data.

Type: System.Int32

A numeric identifier for the event.

Type: System.String

The trace message to write.

Exception Condition

An attempt was made to trace an event during finalization.

The TraceEvent method is intended to trace events that can be processed automatically by tools. For example, a monitoring tool can notify an administrator if a specific event is traced by a specific source.

The TraceEvent method calls the ShouldTrace method of the SourceSwitch object returned by the Switch property. If ShouldTrace returns true, TraceEvent calls the corresponding TraceEvent method of each listener. Otherwise, TraceEvent returns without calling the listeners' methods.

The trace content is listener specific. If the method is not overridden by the listener implementation, the default output is the name of the trace source, its numeric identity, the event type, and the message. Additional trace content is dependent upon the listener's TraceOutputOptions property value.


The EventLogTraceListener object is limited to a maximum id value of 65,535. If the id value specified is greater than 65,535, the EventLogTraceListener object uses 65,535.

The following code example shows the use of the TraceEvent(TraceEventType, Int32) method to pass a trace event to the listeners. This code example is part of a larger example provided for the TraceSource class.

No code example is currently available or this language may not be supported.

.NET Framework
Available since 2.0
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