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L_DicomFindSignature

Summary

Returns a pointer to the Digital Signatures Sequence Item that corresponds to the Digital Signature which has the specified Digital Signature UID, if found in the Data Set.

Syntax

#include "ltdic.h"

L_LTDIC_API pDICOMELEMENT L_DicomFindSignature(hDS,pszSignatureUID)

Parameters

HDICOMDS hDS

A DICOM handle.

const L_TCHAR * pszSignatureUID

Character string that contains the Digital Signature UID of the Digital Signature for which to search.

Returns

Value	Meaning
!NULL	Pointer to the DICOMELEMENT structure that specifies the Digital Signatures Sequence Item which corresponds to the Digital Signature with the specified Digital Signature UID.
NULL	No Digital Signature with the specified Digital Signature UID was found in the Data Set.

Comments

Each Digital Signature should be uniquely identified by a UID specified by the Digital Signature UID (0400,0100) under the corresponding Digital Signatures Sequence Item. Use this function to search the whole Data Set for a Digital Signature by its Digital Signature UID.

Once a pointer to the Digital Signatures Sequence Item is obtained, the following functions can be used to verify, delete, or get information about the Digital Signature:

You can also use the L_DicomGetSignaturesCount and L_DicomGetSignature functions to enumerate the Digital Signatures in the main Data Set or in an Item of a Sequence of Items.

Required DLLs and Libraries

LTDIC
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application

Platforms

Win32, x64

Example

L_INT DicomFindSignatureExample(HDICOMDS hDS, L_PCTSTR pszSignatureUID) 
{ 
   L_INT nRet; 
 
   // Search the whole Data Set for the Digital Signature with the 
   // specified Digital Signature UID 
   pDICOMELEMENT pSignatureItem = L_DicomFindSignature(hDS,pszSignatureUID); 
   if (pSignatureItem) 
   { 
      L_TCHAR* pszMsg = TEXT("The Digital Signature was found.\nPress Yes to examine it or No to delete it."); 
       
      switch (MessageBox(NULL, pszMsg, TEXT("Sample"), MB_YESNOCANCEL)) 
      { 
      case IDYES: 
         // Refer to the example of L_DicomVerifySignature for the 
         // function DicomVerifySignatureExample 
         nRet = DicomVerifySignatureExample(hDS, pSignatureItem); 
         if (nRet != SUCCESS) 
            return nRet; 
 
         break; 
 
      case IDNO: 
         // Delete the Digital Signature 
         L_DicomDeleteSignature(hDS,pSignatureItem); 
         break; 
      } 
   } 
   else 
   { 
      MessageBox(NULL, 
                 TEXT("The Digital Signature was not found."), 
                 TEXT("Sample"), 
                 MB_OK); 
   } 
   return DICOM_SUCCESS; 
}