GetWindowCount Method

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Objective-C
Java
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public int GetWindowCount( 
   int frameIndex
)

'Declaration
 
Public Function GetWindowCount( _
   ByVal frameIndex As Integer _
) As Integer

'Usage
 
Dim instance As DicomDataSet
Dim frameIndex As Integer
Dim value As Integer
 
value = instance.GetWindowCount(frameIndex)

public int GetWindowCount( 
   int frameIndex
)

ObjectiveC Syntax

 function Leadtools.Dicom.DicomDataSet.GetWindowCount( 
   frameIndex 
)

public:
int GetWindowCount( 
   int frameIndex
)

Parameters

frameIndex: A zero-based index that identifies the frame number in the dataset. If the dataset does not support Multi-frames, this parameter is ignored.

Return Value

The number of values under the window center element.

This property gets the number of values under the Window Center (0028,1050) element; this should also equal the number of values under the Window Width (0028,1051) element.
The Multi-frame Functional Groups module may have a Shared Functional Groups Sequence item, and/or a Per-frame Functional Groups Sequence item. Either of these items may have a Frame VOI LUT Sequence (0028,9132) item. If the following elements are not found at the top level in the dataset, this method looks in the Shared Functional Groups Sequence item and the Per-frame Functional Groups Sequence items.

Tag	Name
(0028,1050)	Window Center
(0028,1051)	Window Width
(0028,1055)	Window Center & Width Explanation

For a detailed discussion on Multi-frame Functional Groups see the topic Multi-frame Functional Groups.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Public Sub TestWCWW()
      Dim dicomFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")
      'Make sure to initialize the DICOM engine, this needs to be done only once 
      'In the whole application
      DicomEngine.Startup()

      Dim ds As DicomDataSet = New DicomDataSet()
      Using (ds)
         'Load DICOM File
         ds.Load(dicomFileName, DicomDataSetLoadFlags.None)

         Dim bitsStored As Integer = 16
         Dim add As Boolean = False 'Add a new window or replace the existing one(s)
         Dim windowIndex As Integer = 0
         Dim windowAttributes As DicomWindowAttributes = New DicomWindowAttributes()
         If ds.GetWindowCount(0) > 0 Then
            Dim attributes As DicomWindowAttributes = ds.GetWindow(0)
            If Not attributes Is Nothing Then
               windowAttributes.WindowCenter = attributes.WindowCenter / 2
               windowAttributes.WindowWidth = attributes.WindowWidth / 2
            End If
         Else
            windowAttributes.WindowCenter = 1 << (bitsStored - 1)
            windowAttributes.WindowWidth = 1 << bitsStored
         End If
         windowIndex = ds.GetWindowCount(0)
         If (Not add) Then
            ' Delete the existing window(s) 
            ds.DeleteWindow()
            windowIndex = 0
         End If

         ' Add the new window
         ds.SetWindow(windowIndex, windowAttributes)
         ds.Save(Path.Combine(LEAD_VARS.ImagesDir, "WCWW.dcm"), DicomDataSetSaveFlags.None)

      End Using

      DicomEngine.Shutdown()
   End Sub

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

public void TestWCWW()
   {
      string dicomFileName = Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm");
      //Make sure to initialize the DICOM engine, this needs to be done only once 
      //In the whole application
      DicomEngine.Startup();
      using (DicomDataSet ds = new DicomDataSet())
      {
         //Load DICOM File
         ds.Load(dicomFileName, DicomDataSetLoadFlags.None);

         int bitsStored = 16;
         bool add = false;//Add a new window or replace the existing one(s)
         int windowIndex = 0;
         DicomWindowAttributes windowAttributes = new DicomWindowAttributes();
         if (ds.GetWindowCount(0) > 0)
         {
            DicomWindowAttributes attributes = ds.GetWindow(0);
            if (attributes != null)
            {
               windowAttributes.WindowCenter = attributes.WindowCenter / 2;
               windowAttributes.WindowWidth = attributes.WindowWidth / 2;
            }
         }
         else
         {
            windowAttributes.WindowCenter = 1 << (bitsStored - 1);
            windowAttributes.WindowWidth = 1 << bitsStored;
         }
         windowIndex = ds.GetWindowCount(0);
         if (!add)
         {
            // Delete the existing window(s) 
            ds.DeleteWindow();
            windowIndex = 0;
         }

         // Add the new window
         ds.SetWindow(windowIndex, windowAttributes);
         ds.Save(Path.Combine(LEAD_VARS.ImagesDir, "WCWW.dcm"), DicomDataSetSaveFlags.None);

      }
      DicomEngine.Shutdown();
   }

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

[TestMethod]
public async Task TestWCWW()
{     
   //Make sure to initialize the DICOM engine, this needs to be done only once 
   //In the whole application
   DicomEngine.Startup();
   using (DicomDataSet ds = new DicomDataSet())
   {
      //Load DICOM File
      string filePath = @"Assets\IMAGE3.dcm";
      StorageFile file = await Tools.AppInstallFolder.GetFileAsync(filePath);
      ILeadStream stream = LeadStreamFactory.Create(file);
      bool success = await ds.LoadAsync(stream, DicomDataSetLoadFlags.None);
      Debug.Assert(success);
      int bitsStored = 16;
      bool add = false;//Add a new window or replace the existing one(s)
      int windowIndex = 0;
      DicomWindowAttributes windowAttributes = new DicomWindowAttributes();
      if (ds.GetWindowCount(0) > 0)
      {
         DicomWindowAttributes attributes = ds.GetWindow(0);
         if (attributes != null)
         {
            windowAttributes.WindowCenter = attributes.WindowCenter / 2;
            windowAttributes.WindowWidth = attributes.WindowWidth / 2;
         }
      }
      else
      {
         windowAttributes.WindowCenter = 1 << (bitsStored - 1);
         windowAttributes.WindowWidth = 1 << bitsStored;
      }
      windowIndex = ds.GetWindowCount(0);
      if (!add)
      {
         // Delete the existing window(s) 
         ds.DeleteWindow();
         windowIndex = 0;
      }

      // Add the new window
      ds.SetWindow(windowIndex, windowAttributes);
      string dicomFileNameOutput = "WCWW.dcm";
      StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(dicomFileNameOutput);
      ILeadStream streamOutput = LeadStreamFactory.Create(saveFile);
      using (IDisposable disposableOUT = streamOutput as IDisposable)
      {
         await ds.SaveAsync(streamOutput, DicomDataSetSaveFlags.None);
      }

   }
   DicomEngine.Shutdown();
}

public void TestWCWW(Stream dicomStream, Stream outputStream)
{
   //Make sure to initialize the DICOM engine, this needs to be done only once 
   //In the whole application
   DicomEngine.Startup();
   using (DicomDataSet ds = new DicomDataSet())
   {
      //Load DICOM File
      ds.Load(dicomStream, DicomDataSetLoadFlags.None);
      int bitsStored = 16;
      bool add = false;//Add a new window or replace the existing one(s)
      int windowIndex = 0;
      DicomWindowAttributes windowAttributes = new DicomWindowAttributes();
      if (ds.GetWindowCount(0) > 0)
      {
         DicomWindowAttributes attributes = ds.GetWindow(0);
         if (attributes != null)
         {
            windowAttributes.WindowCenter = attributes.WindowCenter / 2;
            windowAttributes.WindowWidth = attributes.WindowWidth / 2;
         }
      }
      else
      {
         windowAttributes.WindowCenter = 1 << (bitsStored - 1);
         windowAttributes.WindowWidth = 1 << bitsStored;
      }
      windowIndex = ds.GetWindowCount(0);
      if (!add)
      {
         // Delete the existing window(s) 
         ds.DeleteWindow();
         windowIndex = 0;
      }

      // Add the new window
      ds.SetWindow(windowIndex, windowAttributes);
      ds.Save(outputStream, DicomDataSetSaveFlags.None);

   }
   DicomEngine.Shutdown();
}

Public Sub TestWCWW(ByVal dicomStream As Stream, ByVal outputStream As Stream)
   'Make sure to initialize the DICOM engine, this needs to be done only once 
   'In the whole application
   DicomEngine.Startup()
   Using ds As DicomDataSet = New DicomDataSet()
      'Load DICOM File
      ds.Load(dicomStream, DicomDataSetLoadFlags.None)
      Dim bitsStored As Integer = 16
      Dim add As Boolean = False 'Add a new window or replace the existing one(s)
      Dim windowIndex As Integer = 0
      Dim windowAttributes As DicomWindowAttributes = New DicomWindowAttributes()
      If ds.GetWindowCount(0) > 0 Then
         Dim attributes As DicomWindowAttributes = ds.GetWindow(0)
         If Not attributes Is Nothing Then
            windowAttributes.WindowCenter = attributes.WindowCenter / 2
            windowAttributes.WindowWidth = attributes.WindowWidth / 2
         End If
      Else
         windowAttributes.WindowCenter = 1 << (bitsStored - 1)
         windowAttributes.WindowWidth = 1 << bitsStored
      End If
      windowIndex = ds.GetWindowCount(0)
      If (Not add) Then
         ' Delete the existing window(s) 
         ds.DeleteWindow()
         windowIndex = 0
      End If

      ' Add the new window
      ds.SetWindow(windowIndex, windowAttributes)
      ds.Save(outputStream, DicomDataSetSaveFlags.None)

   End Using
   DicomEngine.Shutdown()
End Sub

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DicomDataSet Class
DicomDataSet Members
VoiLutCount Property
GetWindow(Int32) Method
SetWindow(Int32,DicomWindowAttributes) Method
DeleteWindow Method
GetVoiLut Method
SetVoiLut Method
GetVoiLutData Method
DeleteVoiLut Method