BeforeNSet Event

using Leadtools.Dicom.Common.DataTypes.Modality; 
using Leadtools.Dicom; 
using Leadtools.Dicom.Scu.Queries; 
using Leadtools.Dicom.Scu; 
using Leadtools.Dicom.Common.Extensions; 
using Leadtools.Dicom.Scu.Common; 
 
 
 
List<ModalityWorklistResult> WorkLists = new List<ModalityWorklistResult>(); 
 
public void PerformMPPS() 
{ 
   DicomEngine.Startup(); 
   DicomNet.Startup(); 
 
   ModalityWorklistQuery query = new ModalityWorklistQuery(); 
   DicomScp scp = new DicomScp(); 
   QueryRetrieveScu findMwl = new QueryRetrieveScu(); 
 
   scp.AETitle = "MWL_SERVER"; 
   scp.Port = 104; 
   scp.Timeout = 60; 
   scp.PeerAddress = IPAddress.Parse("192.168.0.209"); 
   findMwl.AETitle = "LEAD_CLIENT"; 
   findMwl.Find<ModalityWorklistQuery, ModalityWorklistResult>(scp, query, FoundWorklist); 
 
   // 
   // Create a Modality Perform Procedure Step 
   if (WorkLists.Count > 0) 
   { 
      ModalityPerformedProcedureStep mpps = ModalityPerformedProcedureStep.From(WorkLists[0]); 
      PerformedProcedureStepScu pps = new PerformedProcedureStepScu(); 
 
      pps.AETitle = "LEAD_CLIENT"; 
      pps.BeforeNCreate += new EventHandler<CommonEventArgs>(pps_BeforeNCreate); 
      pps.AfterNCreate += new EventHandler<StatusCommonEventArgs>(pps_AfterNCreate); 
      pps.BeforeNSet += new EventHandler<CommonEventArgs>(pps_BeforeNSet); 
      pps.AfterNSet += new EventHandler<StatusCommonEventArgs>(pps_AfterNSet); 
 
      // 
      // Initialize required procedure step variables 
      // 
      mpps.PerformedStationAeTitle = Environment.MachineName; 
      mpps.PerformedProcedureStepStartDate = DateTime.Now; 
      mpps.PerformedProcedureStepStartTime = DateTime.Now; 
      mpps.PerformedSeriesSequence[0].ProtocolName = ModalityPerformedProcedureStep.RandomId(16); 
      mpps.PerformedSeriesSequence[0].SeriesInstanceUID = "1.2.3.4.5.890.1232"; 
      mpps.SOPInstance.SOPInstanceUid = "1.2.3.4.5.890.1240.1"; 
 
      try 
      { 
         pps.Create<ModalityPerformedProcedureStep>(scp, mpps); 
 
         // 
         // Set the procedure step to done 
         // 
         mpps.PerformedProcedureStepEndDate = DateTime.Now; 
         mpps.PerformedProcedureStepEndTime = DateTime.Now; 
         mpps.PerformedProcedureStepStatus = "COMPLETED"; 
         pps.Set<ModalityPerformedProcedureStep>(scp, mpps); 
      } 
      catch (Exception e) 
      { 
         Console.WriteLine(e.Message); 
      } 
   } 
 
   DicomEngine.Shutdown(); 
   DicomNet.Startup(); 
} 
 
private void FoundWorklist(ModalityWorklistResult result, DicomDataSet ds) 
{ 
   WorkLists.Add(result); 
} 
 
void pps_BeforeNCreate(object sender, CommonEventArgs e) 
{ 
   Console.WriteLine("Before N-CREATE-REQ"); 
   Console.WriteLine("\tAffected Class: " + e.AffectedClass); 
   Console.WriteLine("\tInstance: " + e.Instance); 
   Console.WriteLine("\tMessageId: " + e.MessageID.ToString()); 
   Console.WriteLine("\tPresentationId: " + e.PresentationID.ToString()); 
} 
 
void pps_AfterNCreate(object sender, StatusCommonEventArgs e) 
{ 
   Console.WriteLine("After N-CREATE-REQ"); 
   Console.WriteLine("\tAffected Class: " + e.AffectedClass); 
   Console.WriteLine("\tInstance: " + e.Instance); 
   Console.WriteLine("\tMessageId: " + e.MessageID.ToString()); 
   Console.WriteLine("\tPresentationId: " + e.PresentationID.ToString()); 
   Console.WriteLine("\tStatus: " + e.Status.ToString()); 
} 
 
void pps_BeforeNSet(object sender, CommonEventArgs e) 
{ 
   Console.WriteLine("Before N-SET-REQ"); 
   Console.WriteLine("\tAffected Class: " + e.AffectedClass); 
   Console.WriteLine("\tInstance: " + e.Instance); 
   Console.WriteLine("\tMessageId: " + e.MessageID.ToString()); 
   Console.WriteLine("\tPresentationId: " + e.PresentationID.ToString()); 
} 
 
void pps_AfterNSet(object sender, StatusCommonEventArgs e) 
{ 
   Console.WriteLine("After N-CREATE-REQ"); 
   Console.WriteLine("\tAffected Class: " + e.AffectedClass); 
   Console.WriteLine("\tInstance: " + e.Instance); 
   Console.WriteLine("\tMessageId: " + e.MessageID.ToString()); 
   Console.WriteLine("\tPresentationId: " + e.PresentationID.ToString()); 
   Console.WriteLine("\tStatus: " + e.Status.ToString()); 
}