LoadJsonBeforeElementData Class

Summary
Data for the LoadJsonBeforeElementCallback delegate.
Syntax
C#
C++/CLI
public class LoadJsonBeforeElementData 
public ref class LoadJsonBeforeElementData  
Remarks

A LoadJsonBeforeElementData object is passed to the LoadJsonBeforeElementCallback delegate for each DICOM element is about to be written to the DicomDataSet. The members of LoadJsonBeforeElementData give information about the DICOM element, and can be modified to change the elements and data that are added to the DicomDataSet. The following table identifies which members are information only, and which elements can be changed.

Member Use
Tag can be changed
Vr can be changed
Encoding can be changed
ElementValue can be changed
HasChildElements information only
Example
C#
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; 
 
using Leadtools.Codecs; 
 
public void LoadJsonCallbackExample() 
{ 
   string dicomFileNameIn = Path.Combine(LEAD_VARS.ImagesDir,"DICOM", "image2.dcm"); 
   string jsonFileNameOut = Path.Combine(LEAD_VARS.ImagesDir, "test.json"); 
   string dicomFileNameOut = Path.Combine(LEAD_VARS.ImagesDir, "test.dcm"); 
 
   // Initialize DICOM engine 
   DicomEngine.Startup(); 
 
   DicomDataSet ds = new DicomDataSet(); 
 
   // Load an existing DICOM file 
   ds.Load(dicomFileNameIn, DicomDataSetLoadFlags.None); 
 
   // Save as JSON to a file with no binary data 
   // For the demo, keep the json output file size small by skipping the pixel data 
   // Use the SaveJsonCallback delegate to customize the json file 
   DicomDataSetSaveJsonFlags jsonFlags = 
      DicomDataSetSaveJsonFlags.IgnoreBinaryData | 
      DicomDataSetSaveJsonFlags.TrimWhiteSpace; 
 
   ds.SaveJson(jsonFileNameOut, jsonFlags); 
 
   // Use a LoadmlCallback to read the customized json file 
   ds.LoadJson(jsonFileNameOut, DicomDataSetLoadJsonFlags.None, MyLoadJsonBeforeElementCallback, MyLoadJsonAfterElementCallback); 
 
   // Save the result -- there will be no pixel data 
   ds.Save(dicomFileNameOut, DicomDataSetSaveFlags.None); 
 
   DicomEngine.Shutdown(); 
} 
 
private static bool MyLoadJsonBeforeElementCallback(LoadJsonBeforeElementData data) 
{ 
   // Remove Patient Birth Date 
   if (data.Tag == DicomTag.PatientBirthDate) 
   { 
      return false; 
   } 
 
   // Change the patient name 
   if (data.Tag == DicomTag.PatientName) 
   { 
      data.ElementValue = "NewLast^NewFirst"; 
   } 
 
   // Write the elements to the consolee that have child elements 
   if (data.HasChildElements) 
   { 
      Console.WriteLine("Element {0} has child elements.", data.Tag); 
   } 
   return true; 
} 
 
private static void MyLoadJsonAfterElementCallback(LoadJsonAfterElementData data) 
{ 
   if (data.DicomElement.Tag == DicomTag.PixelData) 
   { 
      // here you could call one of the following to set the pixel data 
      //    data.DicomDataSet.SetBinaryValue  
      //    data.DicomDataSet.SetImage() 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
} 
Requirements

Target Platforms

Help Version 23.0.2024.2.29
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© 1991-2024 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Dicom.Common Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.