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GetWindowCount Method
See Also 
Leadtools.Dicom Namespace > DicomDataSet Class : GetWindowCount Method



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.
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.
Gets the number of values under the window center element. Supported in Silverlight, Windows Phone 7.

Syntax

Visual Basic (Declaration) 
Public Function GetWindowCount( _
   ByVal frameIndex As Integer _
) As Integer
Visual Basic (Usage)Copy Code
Dim instance As DicomDataSet
Dim frameIndex As Integer
Dim value As Integer
 
value = instance.GetWindowCount(frameIndex)
C# 
public int GetWindowCount( 
   int frameIndex
)
C++/CLI 
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.

Example

This example will load a DICOM dataset, extract the window center and window width and then update their values.

Visual BasicCopy Code
Public Sub TestWCWW()
   Dim dicomFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "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(LeadtoolsExamples.Common.ImagesPath.Path + "WCWW.dcm", DicomDataSetSaveFlags.None)

   End Using

   DicomEngine.Shutdown()
End Sub
C#Copy Code
public void TestWCWW()
{
   string dicomFileName = LeadtoolsExamples.Common.ImagesPath.Path + "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(LeadtoolsExamples.Common.ImagesPath.Path + "WCWW.dcm", DicomDataSetSaveFlags.None);

   }
   DicomEngine.Shutdown();
}
SilverlightCSharpCopy Code
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();
}
SilverlightVBCopy Code
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

Remarks

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.

Requirements

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also

Leadtools.Dicom requires a Medical toolkit server license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features