#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.
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.
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.
Class affected by the request. This will be an SOP Class or an SOP MetaClass.
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.
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.
Number of attributes being requested.
None.
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
Win32, x64
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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