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LDicomNet::OnReceiveNGetRequest

#include "ltdic.h"

virtual L_VOID LDicomNet::OnReceiveNGetRequest(nPresentationID, nMessageID, pszClass, pszInstance, pnAttribute, nCount)

Notifies a connection that an N-GET-REQ command was received. This function is available in the Medical Imaging Suite Toolkit.

Parameters

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.

L_UINT32 *pnAttribute

An array of the attributes to get. The attributes must be specified using the Data Element Tags. For a list of available Data Element Tags, refer to Data Element Tag Constants.

L_UINT16 nCount

Number of attributes being requested.

Returns

None.

Comments

A call to this function is generated on a peer member of a connection when LDicomNet::SendNGetRequest is called locally.

To customize this function, you must derive a class from LDicomNet and override this function.

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

Functions

Topics

Receiving Messages

Example

In this example:

LMyDicomNet is a class derived from LDicomNet
LMyDicomNet has the following member variables: m_nClientOrServer: can be (STATUS_NONE, STATUS_SERVER, STATUS_CLIENT) identifies 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
m_pDicomNet points to a valid LMyDicomNet object LMyDicomNet *m_pDicomNet
A connection exists between client and server

An association exists between the client and server

L_VOID LMyDicomNet::OnReceiveNGetRequest(L_UCHAR nPresentationID, L_UINT16 nMessageID, L_TCHAR *pszClass, L_TCHAR *pszInstance, L_UINT32 *pnAttribute, L_UINT16 nCount) 
{ 
   CString strMsg; 
   L_UINT lPeerPort; 
   L_TCHAR  szPeerAddress[100]; 
    
   GetPeerInfo(szPeerAddress, 100, 
    &lPeerPort); 
    
   strMsg.Format(TEXT("*** OnReceiveNGetRequest ***\nPeer[%s]\nnPresentationID[%d]\nnMessageID[%d]\npszClass[%s]\npszInstance[%s]\npnAttribute[%x]\nnCount[%d]"),  
                  szPeerAddress, 
                  nPresentationID,  
                  nMessageID,  
                  pszClass, 
                  pszInstance,  
                  pnAttribute,  
                  nCount);    
    
   //An actual server should check the class and instance against all SOP classes  
   //it manages, and then fill out hDS from the correctly matching instance 
   //This sample loads a fixed data set 
    
   LDicomDS DicomDS1, DicomDS2; 
    
   //Load DS1 
   DicomDS1.LoadDS(MAKE_IMAGE_PATH(TEXT("IMAGE1.dcm")), 0); 
    
   //Initialize DS2 to send 
   DicomDS2.InitDS(CLASS_UNKNOWN, 0); 
   pDICOMELEMENT pFirstElement = DicomDS1.GetFirstElement(NULL, FALSE, FALSE); 
   for (int i = 0; i< nCount; i++)     
   { 
      //get each element 
      pDICOMTAG pDicomTag = LDicomTag::Find(pnAttribute[i]); 
      pDICOMELEMENT pElement = DicomDS1.FindFirstElement(NULL, pDicomTag->nCode, FALSE); 
       
      //If requested tag not found, do not return an empty element 
      if (pElement != NULL)  
      { 
         //copy the element value 
         L_TCHAR szText[100]; 
         DicomDS1.GetConvertValue(pElement, szText,100); 
         DicomDS2.InsertElement(pFirstElement, FALSE, pDicomTag->nCode, pDicomTag->nVR, FALSE, 0); 
         DicomDS2.SetConvertValue(pElement, szText, 1);  
      } 
   } 
    
   //send a response 
   L_UINT16 nStatus = COMMAND_STATUS_SUCCESS; 
   SendNGetResponse(nPresentationID, nMessageID, pszClass, pszInstance, nStatus, &DicomDS2); 
   strMsg += TEXT("SendNGetResponse\n"); 
   AfxMessageBox(strMsg); 
}

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