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L_DicomSendNSetRequest

Summary

Sends an N-SET-REQ message to a peer member of a connection. This function is available in the PACS Imaging.

Syntax

#include "ltdic.h"

L_LTDIC_API L_INT L_DicomSendNSetRequest(hNet, nPresentationID, nMessageID, pszClass, pszInstance, hDS)

Parameters

HDICOMNET hNet

A DICOM Network handle to the peer member of the connection.

L_UCHAR nPresentationID

Presentation ID. The presentation ID provides information about both the class type of the data and the transfer syntax to use when transferring the data.

L_UINT16 nMessageID

Message ID. Each message sent by a member of a connection should have a unique ID. Since a member of a connection may send several messages, this ID allows that member to identify when a specific request has been completed.

L_TCHAR * pszClass

Class affected by the request. This will be an SOP Class or an SOP MetaClass.

L_TCHAR * pszInstance

The instance of the class. A server may, for example, have three instances of the Nuclear Medicine Class. This value identifies the data with a specific instance.

HDICOMDS hDS

Data set that contains the new information to set.

Returns

Value	Meaning
DICOM_SUCCESS	The function was successful.
>0	An error occurred. Refer to Return Codes.

Comments

Calling this function generates a call to RECEIVENSETREQUESTCALLBACK on the SCP. The SCP should respond by calling L_DicomSendNSetResponse which will generate a call to RECEIVENSETRESPONSECALLBACK.

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, Linux.

Example

L_INT DicomSendNSetRequestExample(HDICOMNET hNet) 
{ 
   L_TCHAR szClassUID[200]; 
   L_TCHAR szInstance[200]; 
   L_TCHAR szMsg[200]; 
   HDICOMPDU hPDU; 
   L_UCHAR nID; 
   L_TCHAR szNewID[200]; 
   HDICOMDS hDS=NULL; 
   pDICOMTAG pTag=NULL; 
   pDICOMELEMENT pElement=NULL; 
   L_INT nRet; 
    
   /* this sample allows you to change the patient id of an SOP Instance */ 
    
   /* send an N-GET-REQUEST to the server */ 
    
   /* this sample uses fixed values */ 
   lstrcpy(szClassUID, UID_SC_IMAGE_STORAGE); 
    
   lstrcpy(szInstance, TEXT("998.998.1.19950214.94000.1.102")); 
    
   /* new patient id */ 
   lstrcpy(szNewID, TEXT("123-45-6789")); 
    
   /* create the data set that encodes the changed element(s) */ 
   hDS = L_DicomCreateDS(NULL); 
   L_DicomInitDS(hDS, CLASS_UNKNOWN, 0); 
   L_DicomResetDS(hDS); 
    
   pTag = L_DicomFindTag(TAG_PATIENT_ID); 
   pElement = L_DicomInsertElement(hDS, NULL, FALSE, TAG_PATIENT_ID, pTag->nVR, FALSE, 0); 
   if (pElement == NULL) 
   { 
      L_DicomFreeDS(hDS); 
      return DICOM_ERROR_MEMORY; 
   } 
 
   L_DicomSetStringValue(hDS, pElement, szNewID, 1, DICOM_CHARACTER_SET_DEFAULT); 
    
   hPDU = L_DicomGetAssociate(hNet); 
    
   /* now, send a request */ 
   nID = L_DicomFindAbstract(hPDU, szClassUID); 
   if(nID == 0) 
   { 
      wsprintf(szMsg, TEXT("Abstract Syntax %s Not Supported by Association!"), szClassUID); 
      MessageBox(NULL, szMsg, TEXT("Error"), MB_OK); 
   } 
   else 
   { 
      nRet = L_DicomSendNSetRequest(hNet, nID, 1, szClassUID, szInstance, hDS); 
      if (nRet != DICOM_SUCCESS) 
      { 
         L_DicomFreeDS(hDS); 
         return nRet; 
      } 
   } 
   L_DicomFreeDS(hDS); 
   return DICOM_SUCCESS; 
}