SaveJsonCallback Delegate

C#
Visual Basic
Objective-C
Java
C++

public delegate bool SaveJsonCallback( 
   SaveJsonData data
)

'Declaration

Public Delegate Function SaveJsonCallback( _
   ByVal data As SaveJsonData _
) As Boolean

'Usage

Dim instance As New SaveJsonCallback(AddressOf HandlerMethod)

public delegate bool SaveJsonCallback( 
   SaveJsonData^ data
)

Parameters

data: An instance of the SaveJsonData interface containing the progress callback data.

Return Value

true to write this DICOM element in the output JSON file; false to skip writing this element in the output JSON file

This delegate is called once for each DICOM element before the DICOM element is written to the JSON file.

This example loads a sample DICOM file, and saves the contents as a JSON file. The JSON file output is customized by using the SaveJsonCallback delegate to assign a BulkDataUri.

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

Copy Code

Imports Leadtools.Dicom
Imports Leadtools.Dicom.Common
Imports Leadtools.Dicom.Common.Extensions
Imports Leadtools.Dicom.Common.Linq
Imports Leadtools.Dicom.Common.Linq.BasicDirectory
Imports Leadtools
Imports Leadtools.Dicom.Common.DataTypes

<TestMethod()> _
Public Sub SaveJsonCallbackExample()
   uriIndex = 0
   Dim dicomFileNameIn As String = Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")
   Dim xmlFileNameOut As String = Path.Combine(LEAD_VARS.ImagesDir, "test.json")

   DicomEngine.Startup()

   Dim ds As New DicomDataSet()

   ' Load an existing DICOM file
   ds.Load(dicomFileNameIn, DicomDataSetLoadFlags.None)

      ' Keep the JSON output file size small by writing binary data as BulkDataUri 
   ' The URI written is modified in the callback
   ds.SaveJson(xmlFileNameOut, DicomDataSetSaveJsonFlags.BulkDataUri, AddressOf MySaveJsonCallback)

   DicomEngine.Shutdown()
End Sub

Public Shared uriIndex As Integer = 0

Public Shared Function GenerateUri() As String
   uriIndex += 1
   Return String.Format("http://MySampleUri/{0}", uriIndex)
End Function

Public Shared Function MySaveJsonCallback(ByVal d As SaveJsonData) As Boolean
   If d.DicomElement Is Nothing Then
      Return True
   End If

   Dim vr As DicomVRType = d.DicomElement.VR
   Dim isBinary As Boolean = (vr = DicomVRType.OB OrElse vr = DicomVRType.OD OrElse vr = DicomVRType.OF OrElse vr = DicomVRType.OW OrElse vr = DicomVRType.UN)
   If isBinary Then
      ' Set a URI
      d.BulkDataUri = GenerateUri()
   End If

   Return True
End Function

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

using Leadtools.Dicom;
using Leadtools.Dicom.Common;
using Leadtools.Dicom.Common.Extensions;
using Leadtools;
using Leadtools.Dicom.Common.Linq.BasicDirectory;
using Leadtools.Dicom.Common.DataTypes;

[TestMethod]
public void SaveJsonCallbackExample()
{
   uriIndex = 0;
   string dicomFileNameIn = Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm");
   string xmlFileNameOut = Path.Combine(LEAD_VARS.ImagesDir, "test.json");

   DicomEngine.Startup();

   DicomDataSet ds = new DicomDataSet();

   // Load an existing DICOM file
   ds.Load(dicomFileNameIn, DicomDataSetLoadFlags.None);

   // Keep the JSON output file size small by writing binary data as BulkDataUri 
   // The URI written is modified in the callback
   ds.SaveJson(xmlFileNameOut, DicomDataSetSaveJsonFlags.BulkDataUri, MySaveJsonCallback);

   DicomEngine.Shutdown();
}

public static int uriIndex = 0;

public static string GenerateUri()
{
   uriIndex++;
   return string.Format(@"http://MySampleUri/{0}", uriIndex);
}

public static bool MySaveJsonCallback(SaveJsonData d)
{
   if (d.DicomElement == null)
      return true;

   DicomVRType vr = d.DicomElement.VR;
   bool isBinary = (
                      vr == DicomVRType.OB ||
                      vr == DicomVRType.OD ||
                      vr == DicomVRType.OF ||
                      vr == DicomVRType.OW ||
                      vr == DicomVRType.UN
                   );
   if (isBinary)
   {
      // Set a URI
      d.BulkDataUri = GenerateUri();
   }

   return true;
}

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

Target Platforms

Reference

SaveJsonCallback Members
Leadtools.Dicom.Common.Extensions Namespace
SaveJson(DicomDataSet,String,DicomDataSetSaveJsonFlags,SaveJsonCallback) Method
SaveJson(DicomDataSet,Stream,DicomDataSetSaveJsonFlags,SaveJsonCallback) Method
SaveJson(DicomDataSet,String,DicomDataSetSaveJsonFlags) Method
SaveJson(DicomDataSet,Stream,DicomDataSetSaveJsonFlags) Method
SaveJsonCallback Delegate