LDicomDS::FindFirstDescendant

L_VOID DisplayElementValue(LDicomDS &ds, pDICOMELEMENT pElement) 
{ 
   if (pElement != NULL) 
   { 
      L_TCHAR szMsg[200] = {0}; 
      L_TCHAR *szValue = ds.GetStringValue(pElement, 0, 1); 
      wsprintf(szMsg, TEXT("*** %s\n"), szValue); 
      OutputDebugString(szMsg); 
   } 
} 
 
L_INT LDicomDS_FindFirstDescendantExample() 
{ 
   L_TCHAR *pszFile = MAKE_IMAGE_PATH(TEXT("image1.dcm")); 
   LDicomDS ds; 
   L_UINT16 uRet = ds.LoadDS(pszFile, 0); 
   assert(uRet == DICOM_SUCCESS); 
 
   // Example 1:  
   // Find all occurrences of TAG_CODE_VALUE in the dataset, searching recursively 
   // Output should be: 
   //    T-A2000 
   //    F-10450 
   OutputDebugString(TEXT("Example 1\n")); 
   pDICOMELEMENT pElement = ds.FindFirstDescendant(NULL, TAG_CODE_VALUE, FALSE); 
   while (pElement != NULL) 
   { 
      DisplayElementValue(ds, pElement); 
      pElement = ds.FindNextDescendant(NULL, pElement, FALSE); 
   } 
 
   // For the next examples, we need the two parent sequences that contain the code items 
   pDICOMELEMENT pElementAnatomicRegionSequence = ds.FindFirstDescendant(NULL, TAG_ANATOMIC_REGION_SEQUENCE, TRUE); 
   pDICOMELEMENT pElementPatientOrientationCodeSequence = ds.FindFirstDescendant(NULL, TAG_PATIENT_ORIENTATION_CODE_SEQUENCE, TRUE); 
 
   assert(pElementAnatomicRegionSequence != NULL); 
   assert(pElementPatientOrientationCodeSequence != NULL); 
 
   // Example 2: 
   // Find all occurrences of TAG_CODE_VALUE with (0028,2218) Anatomic Region Sequence as pParent 
   // Search only the next level 
   // Output should be empty, because TAG_CODE_VALUE are not at next level 
   OutputDebugString(TEXT("Example 2\n")); 
   pElement = ds.FindFirstDescendant(pElementAnatomicRegionSequence, TAG_CODE_VALUE, TRUE); 
   while (pElement != NULL) 
   { 
      DisplayElementValue(ds, pElement); 
      pElement = ds.FindNextDescendant(pElementAnatomicRegionSequence, pElement, TRUE); 
   } 
 
   // Example 3: 
   // Find all occurrences of TAG_CODE_VALUE with (0028,2218) Anatomic Region Sequence as pParent 
   // Search recursively 
   // Output should be 
   //    T-A2000 
   OutputDebugString(TEXT("Example 3\n")); 
   pElement = ds.FindFirstDescendant(pElementAnatomicRegionSequence, TAG_CODE_VALUE, FALSE); 
   while (pElement != NULL) 
   { 
      DisplayElementValue(ds, pElement); 
      pElement = ds.FindNextDescendant(pElementAnatomicRegionSequence, pElement, FALSE); 
   } 
 
   // Example 4: 
   // Find all occurrences of TAG_CODE_VALUE with (0028,2218) Anatomic Region Sequence as pParent 
   // Search recursively 
   // Output should be 
   //    F-10450 
   OutputDebugString(TEXT("Example 4\n")); 
   pElement = ds.FindFirstDescendant(pElementPatientOrientationCodeSequence, TAG_CODE_VALUE, FALSE); 
   while (pElement != NULL) 
   { 
      DisplayElementValue(ds, pElement); 
      pElement = ds.FindNextDescendant(pElementPatientOrientationCodeSequence, pElement, FALSE); 
   } 
 
   OutputDebugString(TEXT("Finished")); 
 
   return DICOM_SUCCESS; 
}