Invokes the specified traceAction to allow setting values in a new TraceRecord if and only if tracing is permitted at the given category and level.
Namespace: System.Web.Http.Tracing
Assembly: System.Web.Http (in System.Web.Http.dll)
Syntax
'Declaration
Sub Trace ( _
request As HttpRequestMessage, _
category As String, _
level As TraceLevel, _
traceAction As Action(Of TraceRecord) _
)
'Usage
Dim instance As ITraceWriter
Dim request As HttpRequestMessage
Dim category As String
Dim level As TraceLevel
Dim traceAction As Action(Of TraceRecord)
instance.Trace(request, category, level, _
traceAction)
void Trace(
HttpRequestMessage request,
string category,
TraceLevel level,
Action<TraceRecord> traceAction
)
void Trace(
HttpRequestMessage^ request,
String^ category,
TraceLevel level,
Action<TraceRecord^>^ traceAction
)
abstract Trace :
request:HttpRequestMessage *
category:string *
level:TraceLevel *
traceAction:Action<TraceRecord> -> unit
function Trace(
request : HttpRequestMessage,
category : String,
level : TraceLevel,
traceAction : Action<TraceRecord>
)
Parameters
request
Type: HttpRequestMessageThe current HttpRequestMessage. It may be null but doing so will prevent subsequent trace analysis from correlating the trace to a particular request.
category
Type: System.StringThe logical category for the trace. Users can define their own.
level
Type: System.Web.Http.Tracing.TraceLevelThe TraceLevel at which to write this trace.
traceAction
Type: System.Action<TraceRecord>The action to invoke if tracing is enabled. The caller is expected to fill in the fields of the given TraceRecord in this action.
Remarks
If tracing is permitted at the given category and level, the ITraceWriter will construct a TraceRecord and invoke the caller's action to allow it to set values in the TraceRecord provided to it. When the caller's action returns, the TraceRecord will be recorded. If tracing is not enabled, traceAction will not be called.