LDicomNet::SendNSetRequest

#include "ltdic.h"

L_INT LDicomNet::SendNSetRequest(nPresentationID, nMessageID, pszClass, pszInstance, pDS)

L_UCHAR nPresentationID;	/* presentation ID */
L_UINT16 nMessageID;	/* message ID */
L_TCHAR * pszClass;	/* class type */
L_TCHAR * pszInstance;	/* instance */
LDicomDS *pDS;	/* data set */

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

Parameter	Description
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.
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.
pszClass	Class affected by the request. This will be an SOP Class or an SOP MetaClass.
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.
pDS	Data set that contains the new information to set.

Returns

0	SUCCESS
>0	An error occurred. Refer to Return Codes.

Comments

Calling this function generates a call to LDicomNet::OnReceiveNSetRequest on the SCP. The SCP should respond by calling LDicomNet::SendNSetResponse which will generate a call to LDicomNet::OnReceiveNSetResponse.

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

See Also

Functions:	LDicomNet::SendNSetResponse, LDicomNet::OnReceiveNSetRequest, LDicomNet::OnReceiveNSetResponse
Topics:	Working with DICOM Network Connections

Example

L_INT LDicomNet__SendNSetRequestExample(LMyDicomNet *m_pDicomNet)
{
   //This example sends an N-Set request to the server that
   //changes the patient id of an SOP Instance
   //In this example:
   //
   //1. LMyDicomNet is a class derived from LDicomNet
   //2. LMyDicomNet has the following member variables:
   //       m_nClientOrServer:  can be (STATUS_NONE, STATUS_SERVER, STATUS_CLIENT)
   //                           identifieds the LMyDicomNet object as a server or a client
   //       m_nDataCommand:     can be (COMMAND_C_MOVE,COMMAND_C_GET) 
   //                           set so the server knows how a C-Store Response was generated
   //
   //3. m_pDicomNet points to a valid LMyDicomNet object
   //      LMyDicomNet *m_pDicomNet
   // 
   //4. A connection exists between client and server
   //5. An association exists between the client and server
   L_INT nRet;
   CString strMsg = TEXT("N-Set\n");
   
   //Choose an SOP Class to find
   CString strClassUID = UID_SC_IMAGE_STORAGE;
   
   //Choose an SOP Instance to modify
   CString strInstanceUID = TEXT("1.1.1.1");
   
   //create the data set that encodes the changed element(s)
   LDicomDS DicomDS;
   DicomDS.InitDS(CLASS_UNKNOWN, 0);
   
   pDICOMTAG pDicomTag = LDicomTag::Find(TAG_PATIENT_ID);
   
   pDICOMELEMENT pElement = DicomDS.InsertElement( 
      NULL,                      //pDICOMELEMENT pNeighbor
      FALSE,                     //L_BOOL bChild
      TAG_PATIENT_ID,            //L_UINT32 nTag
      pDicomTag->nVR,            //L_UINT16 nVR
      FALSE,                     //L_BOOL bSequence,
      0                        //L_UINT32 nIndex
      );
   
   //Choose new patient ID
   CString strNewPatientID = TEXT("123-45-6789");
   DicomDS.SetStringValue(pElement, (L_TCHAR *)(LPCTSTR)strNewPatientID, 1,
    DICOM_CHARACTER_SET_DEFAULT);
   
   //Get the associate object
   LDicomAssociate *pDicomAssociate = m_pDicomNet->GetAssociate();
   
   //Is class supported in the assocation?
   L_UCHAR nPresentationID = pDicomAssociate->FindAbstract((L_TCHAR *)(LPCTSTR)strClassUID);
   
   //nPresentationID must be odd--0 indicates failure
   if (nPresentationID==0)
   {
      CString strTmp;
      strTmp.Format(TEXT("Abstract Syntax[%s] Not Included in the Association"), strClassUID);
      strMsg = strMsg + strTmp;
   }
   else //success
   {      
      //send a request
      L_UINT16 uUniqueID = 99;
      nRet =m_pDicomNet->SendNSetRequest( nPresentationID, 
                                    uUniqueID, 
                                   (L_TCHAR *)(LPCTSTR)strClassUID, 
                                   (L_TCHAR *)(LPCTSTR)strInstanceUID, 
                                    &DicomDS
                                  );
      if(nRet > 0)
         return nRet;
   }
   AfxMessageBox(strMsg);
   return DICOM_SUCCESS;
}