Public Property ViewerPreLoadedImages As Integer

Dim instance As MedicalViewerLoaderBase
Dim value As Integer
 
instance.ViewerPreLoadedImages = value
 
value = instance.ViewerPreLoadedImages

public int ViewerPreLoadedImages {get; set;}

public:
property int ViewerPreLoadedImages {
   int get();
   void set (    int value);
}

Private viewer As New MedicalViewer()

      Public Sub LoadSeries()
         Leadtools.Examples.Support.Unlock()

         Dim clientInfo As New AeInfo()

         clientInfo.Address = Dns.GetHostName()
         clientInfo.Port = 1000
         clientInfo.AETitle = "TEST_CLIENT"

         Dim serverInfo As New DicomScp()
         serverInfo.AETitle = "LEAD_SERVER"
         serverInfo.Port = 104
         serverInfo.PeerAddress = GetLocalServerAddress()
         serverInfo.Timeout = 30

         Dim queryClient As New PacsQueryClient(clientInfo, serverInfo)

         Dim queryResult() As DicomDataSet = queryClient.FindSeries(New FindQuery())

         If queryResult.Length > 0 Then
            Dim retrieveClient As New PacsRetrieveClient(clientInfo, serverInfo)


            'make sure you have configured the workstation database correctly for the PacsRetrieveClient to store the images.
            retrieveClient.StoreRetrievedImages = True 'we want to store the images locally so we can view them later.

            Dim loader As New MedicalViewerLoader(retrieveClient)

            loader.ViewerControl = viewer
            loader.Layout.Auto = True
            loader.LazyLoading = True 'this will cause to load the images for displayed sub-cells only
            loader.ViewerPreLoadedImages = 1 'this will allow to load 1 image after and before the displayed sub-cell for fast scrolling.

            AddHandler loader.ProgressState, AddressOf loader_ProgressState
            AddHandler loader.RequestedImageUpdated, AddressOf loader_RequestedImageUpdated

            Dim studyInstanceUID As String = queryResult(0).GetValue(Of String)(DicomTag.StudyInstanceUID, String.Empty)
            Dim seriesInstanceUID As String = queryResult(0).GetValue(Of String)(DicomTag.SeriesInstanceUID, String.Empty)

            If loader.LoadSeries(studyInstanceUID, seriesInstanceUID) Then
               Console.WriteLine("Number of viewer cells: {0}", viewer.Cells.Count)
               Console.WriteLine("Number of loader created cells: {0}", loader.SeriesCells.Length)

               For Each cell As MedicalViewerMultiCell In loader.FindSeriesCells(seriesInstanceUID)
                  Dim sopInstanceUID As String = loader.FindDisplayedCellInstanceInformation(cell, 0).SOPInstanceUID

                  Console.WriteLine("Cell #{0} has first image with SOPInstanceUID={1}", viewer.Cells.IndexOf(cell), sopInstanceUID)


                  Dim ds As DicomDataSet = loader.GetDicom(sopInstanceUID)
                  Dim imageElement As DicomElement = ds.FindFirstElement(Nothing, DicomTag.PixelData, True)

                  If Nothing IsNot imageElement AndAlso imageElement.Length > 0 Then
                     Using codec As New RasterCodecs()
                        Using image As RasterImage = ds.GetImage(imageElement, 0, 24, RasterByteOrder.Gray, DicomGetImageFlags.AutoApplyModalityLut Or DicomGetImageFlags.AutoApplyVoiLut)
                           codec.Save(image, Path.Combine(LEAD_VARS.ImagesDir, sopInstanceUID), RasterImageFormat.Jpeg, image.BitsPerPixel)

                           Console.WriteLine("Image with SOPInstanceUID={0} saved to {1}", sopInstanceUID, Path.Combine(LEAD_VARS.ImagesDir, sopInstanceUID))
                        End Using
                     End Using
                  End If

                  Dim imagesPath() As String = loader.GetSeriesImages(cell)

                  Console.WriteLine("Cell #{0} is loaded from {1} file(s):", viewer.Cells.IndexOf(cell), imagesPath.Length)

                  For Each imagePath As String In imagesPath
                     Console.WriteLine(imagesPath)
                  Next imagePath
               Next cell
            End If

            loader.Close()
         End If
      End Sub

      Private Sub loader_RequestedImageUpdated(ByVal sender As Object, ByVal e As RequestedImageUpdatedEventArgs)
         Console.WriteLine("Image streamer for cell {0}, sub-cell {1}", viewer.Cells.IndexOf(e.Cell), e.SubCellIndex)
      End Sub

      Private Sub loader_ProgressState(ByVal sender As Object, ByVal e As ProgressEventArgs)
         Console.WriteLine(e.Message)
      End Sub

      Public Function GetLocalServerAddress() As IPAddress
         Dim addresses() As IPAddress

         'you can use any IP address which a DICOM server is listning to.
         addresses = Dns.GetHostAddresses(Dns.GetHostName())

         For Each address As IPAddress In addresses
            If address.AddressFamily = System.Net.Sockets.AddressFamily.InterNetwork Then
               Return address
            End If
         Next address

         Throw New InvalidOperationException("No IP Address V4 found for this machine.")
      End Function

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

MedicalViewer viewer = new MedicalViewer();

      public void LoadSeries ( ) 
      {
         Leadtools.Examples.Support.Unlock ( ) ;

         AeInfo clientInfo = new AeInfo ( ) ;

         clientInfo.Address = Dns.GetHostName () ;
         clientInfo.Port = 1000 ;
         clientInfo.AETitle = "TEST_CLIENT" ;

         DicomScp serverInfo = new DicomScp ( ) ;
         serverInfo.AETitle = "LEAD_SERVER" ;
         serverInfo.Port = 104 ;
         serverInfo.PeerAddress = GetLocalServerAddress ()  ;
         serverInfo.Timeout = 30 ;

         PacsQueryClient queryClient = new PacsQueryClient ( clientInfo, serverInfo ) ;

         DicomDataSet[] queryResult =  queryClient.FindSeries ( new FindQuery ( ) ) ;

         if ( queryResult.Length > 0 ) 
         {
            PacsRetrieveClient retrieveClient = new PacsRetrieveClient(clientInfo, serverInfo);


            //make sure you have configured the workstation database correctly for the PacsRetrieveClient to store the images.
            retrieveClient.StoreRetrievedImages = true ; //we want to store the images locally so we can view them later.

            MedicalViewerLoader loader = new MedicalViewerLoader(retrieveClient );

            loader.ViewerControl = viewer ;
            loader.Layout.Auto = true ;
            loader.LazyLoading = true ; //this will cause to load the images for displayed sub-cells only
            loader.ViewerPreLoadedImages = 1; //this will allow to load 1 image after and before the displayed sub-cell for fast scrolling.

            loader.ProgressState += new ProgressEventHandler(loader_ProgressState);
            loader.RequestedImageUpdated += new EventHandler<RequestedImageUpdatedEventArgs>(loader_RequestedImageUpdated);

            string studyInstanceUID = queryResult [ 0 ].GetValue <string> ( DicomTag.StudyInstanceUID, string.Empty) ;
            string seriesInstanceUID = queryResult[ 0 ].GetValue <string> ( DicomTag.SeriesInstanceUID, string.Empty )  ;

            if ( loader.LoadSeries ( studyInstanceUID, seriesInstanceUID )  )
            {
               Console.WriteLine ( "Number of viewer cells: {0}",  viewer.Cells.Count ) ;
               Console.WriteLine ( "Number of loader created cells: {0}",  loader.SeriesCells.Length ) ;

               foreach ( MedicalViewerMultiCell cell in loader.FindSeriesCells ( seriesInstanceUID ) ) 
               {
                  string sopInstanceUID = loader.FindDisplayedCellInstanceInformation ( cell, 0 ).SOPInstanceUID ;

                  Console.WriteLine ( "Cell #{0} has first image with SOPInstanceUID={1}", viewer.Cells.IndexOf ( cell ), sopInstanceUID ) ;


                  DicomDataSet ds = loader.GetDicom ( sopInstanceUID ) ;
                  DicomElement imageElement = ds.FindFirstElement ( null, DicomTag.PixelData, true ) ;

                  if ( null != imageElement && imageElement.Length > 0 )
                  {
                     using ( RasterCodecs codec = new RasterCodecs ( ) )
                     {
                        using ( RasterImage image = ds.GetImage ( imageElement, 0, 24, RasterByteOrder.Gray, DicomGetImageFlags.AutoApplyModalityLut | DicomGetImageFlags.AutoApplyVoiLut ) )
                        {
                           codec.Save(image,Path.Combine(LEAD_VARS.ImagesDir,sopInstanceUID), RasterImageFormat.Jpeg, image.BitsPerPixel);

                           Console.WriteLine("Image with SOPInstanceUID={0} saved to {1}", sopInstanceUID,Path.Combine(LEAD_VARS.ImagesDir, sopInstanceUID));
                        }
                     }
                  }

                  string [] imagesPath = loader.GetSeriesImages ( cell ) ;

                  Console.WriteLine ( "Cell #{0} is loaded from {1} file(s):", viewer.Cells.IndexOf ( cell ), imagesPath.Length  ) ;

                  foreach ( string imagePath in imagesPath ) 
                  {
                     Console.WriteLine ( imagesPath ) ;
                  }
               }
            }

            loader.Close ( ) ;
         }
      }

      void loader_RequestedImageUpdated(object sender, RequestedImageUpdatedEventArgs e)
      {
         Console.WriteLine ( "Image streamer for cell {0}, sub-cell {1}", viewer.Cells.IndexOf ( e.Cell ), e.SubCellIndex )  ;
      }

      void loader_ProgressState(object sender, ProgressEventArgs e)
      {
         Console.WriteLine ( e.Message ) ;
      }

      public IPAddress GetLocalServerAddress ()  
      {
         IPAddress [ ] addresses ;

         //you can use any IP address which a DICOM server is listning to.
         addresses = Dns.GetHostAddresses ( Dns.GetHostName ( ) ) ;

         foreach ( IPAddress address in addresses ) 
         {
            if ( address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork ) 
            {
               return address ;
            }
         }

         throw new InvalidOperationException ( "No IP Address V4 found for this machine." ) ;
      }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}