TrackingChannel.Send(TrackingRecord) Method

Definition

Namespace:

System.Workflow.Runtime.Tracking

Assembly:

System.Workflow.Runtime.dll

When implemented in a derived class, sends a TrackingRecord on the TrackingChannel.

protected public:
 abstract void Send(System::Workflow::Runtime::Tracking::TrackingRecord ^ record);

protected internal abstract void Send (System.Workflow.Runtime.Tracking.TrackingRecord record);

abstract member Send : System.Workflow.Runtime.Tracking.TrackingRecord -> unit

Protected Friend MustOverride Sub Send (record As TrackingRecord)

Parameters

record

TrackingRecord

The TrackingRecord to send.

Examples

The following example demonstrates an implementation of the Send method. In this implementation, tracking messages are written to the event log when a workflow terminates. This sample is from the Termination Tracking Service SDK sample. For more information, see Termination Tracking Service Sample.

/// <summary>
/// Receives tracking events.  Instance terminated events are written to the event log.
/// </summary>
protected override void Send(TrackingRecord record)
{
    WorkflowTrackingRecord instanceTrackingRecord = record as WorkflowTrackingRecord;

    if ((null == instanceTrackingRecord) || (TrackingWorkflowEvent.Terminated != instanceTrackingRecord.TrackingWorkflowEvent))
        return;

    // Create an EventLog instance and assign its source.
    EventLog log = new EventLog();
    log.Source = sourceValue;

    // Write an informational entry to the event log.
    TrackingWorkflowTerminatedEventArgs terminatedEventArgs = instanceTrackingRecord.EventArgs as TrackingWorkflowTerminatedEventArgs;

    StringBuilder message = new StringBuilder(512);
    message.AppendLine(string.Format(System.Globalization.CultureInfo.InvariantCulture, "Workflow instance {0} has been terminated.", parametersValue.InstanceId.ToString()));
    message.AppendLine();

    if (null != terminatedEventArgs.Exception)
        message.AppendLine(terminatedEventArgs.Exception.ToString());

    log.WriteEntry(message.ToString(), EventLogEntryType.Warning);
}

'/ <summary>
'/ Receives tracking events.  Instance terminated events are written to the event log.
'/ </summary>
Protected Overrides Sub Send(ByVal record As TrackingRecord)

    Dim instanceTrackingRecord As WorkflowTrackingRecord = CType(record, WorkflowTrackingRecord)

    If instanceTrackingRecord Is Nothing Or Not TrackingWorkflowEvent.Terminated = instanceTrackingRecord.TrackingWorkflowEvent Then
        Return
    End If

    ' Create an EventLog instance and assign its source.
    Dim log As New EventLog()
    log.Source = sourceValue

    ' Write an informational entry to the event log.  
    Dim terminatedEventArgs As TrackingWorkflowTerminatedEventArgs = CType(instanceTrackingRecord.EventArgs, TrackingWorkflowTerminatedEventArgs)

    Dim Message As New StringBuilder(512)
    Message.AppendLine(String.Format(System.Globalization.CultureInfo.InvariantCulture, "Workflow instance 0} has been terminated.", parametersValue.InstanceId.ToString()))
    Message.AppendLine()

    If terminatedEventArgs.Exception Is Nothing Then
        Message.AppendLine(terminatedEventArgs.Exception.ToString())
    End If


    log.WriteEntry(Message.ToString(), EventLogEntryType.Warning)
End Sub

Remarks

The runtime tracking infrastructure calls Send to deliver a TrackingRecord on the TrackingChannel when it matches a track point in a TrackingProfile. You can treat the tracking information sent on the TrackingChannel in whatever manner the requirements of your application dictate.