LDicomNet::OnReceiveCGetRequest

#include "ltdic.h"

virtual L_VOID LDicomNet::OnReceiveCGetRequest(nPresentationID, nMessageID, pszClass, nPriority, pDS)

L_UCHAR nPresentationID;	/* presentation ID */
L_UINT16 nMessageID;	/* message ID */
L_CHAR * pszClass;	/* class type */
L_UINT16 nPriority;	/* priority of the message */
LDicomDS *pDS;	/* data set to get */

Notifies a connection that a C-GET-REQ command was received. This function is available in the Medical Suite 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.
nPriority	The priority level of the message. The Service Class Provider may or may not support priority. Therefore, setting this parameter may or may not have any effect. Possible values are:
	Value	Meaning
	COMMAND_PRIORITY_LOW	[0x0002] Low priority message.
	COMMAND_PRIORITY_MEDIUM	[0x0000] Medium priority message.
	COMMAND_PRIORTY_HIGH	[0x0001] High priority message.
pDS	Pointer to the data set to be found.

Returns

None.

Comments

A call to this function is generated on an SCP when LDicomNet::SendCGetRequest is called by the SCP.

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

See Also

Functions:	LDicomNet::SendCGetRequest, LDicomNet::SendCGetResponse, LDicomNet::OnReceiveCGetResponse
Topics:	Receiving Messages

Example

//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_VOID LMyDicomNet::OnReceiveCGetRequest(L_UCHAR nPresentationID, L_UINT16 nMessageID, L_CHAR *pszClass, L_UINT16 nPriority, LDicomDS *pDS)
{
   CString strMsg;
   L_UINT  lPeerPort;
   L_CHAR  szPeerAddress[100];

   GetPeerInfo(szPeerAddress, &lPeerPort);
   strMsg.Format("*** OnReceiveCGetRequest ***\nPeer[%s]\nnPresentationID[%d]\nnMessageID[%d]\npszClass[%s]\nnPriority[%d]",
                  szPeerAddress,
                  nPresentationID,
                  nMessageID,
                  pszClass,
                  nPriority);

   //The AE should check the data set, and perform
   //matching against the files stored on the AE to determine
   //what data set(s) should be sent back to the calling AE.
   //For this sample, just send a predetermined file

   //load the sample file
    L_CHAR * szFile = "d:\\work\\images\\dicom16.dic";
    LDicomDS DicomDS;
    DicomDS.LoadDS(szFile, 0);

    //send a store command for the GET sub-operation
    CString strAE = GetAssociate()->GetCalling();

    pDICOMELEMENT pElement = DicomDS.FindFirstElement(NULL, TAG_SOP_INSTANCE_UID, FALSE);
    CString strInstance = DicomDS.GetStringValue(pElement, 0, 1);

    //the following will cause a ReceiveCStoreResponse event on this machine
    m_nDataCommand = COMMAND_C_GET;
    SendCStoreRequest(  nPresentationID,
                        nMessageID+ 1,
                        pszClass,
                        (L_CHAR *)(LPCTSTR)strInstance,
                        nPriority,
                        (L_CHAR *)(LPCTSTR)strAE,
                        nMessageID,
                        &DicomDS
                     );

    strMsg = strMsg + "SendCStoreRequest\n";
    AfxMessageBox(strMsg);
    //Client sends C-Get response after receiving the CStoreResponse from the calling AE
}