LDicomNet::OnReceiveCGetRequest

Summary

Notifies a connection that a C-GET-REQ command was received. This function is available in the PACS Imaging Toolkit.

Syntax

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

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_UINT16 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:

LDicomDS *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

Platforms

Win32, x64

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)
   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

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_TCHAR *pszClass, L_UINT16 nPriority, LDicomDS *pDS) 
   { 
      UNREFERENCED_PARAMETER(pDS); 
      CString strMsg; 
      L_UINT  lPeerPort; 
      L_TCHAR  szPeerAddress[100]; 
       
      GetPeerInfo(szPeerAddress, 100,&lPeerPort); 
      strMsg.Format(TEXT("*** 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_TCHAR * szFile = MAKE_IMAGE_PATH(TEXT("IMAGE1.dcm")); 
       LDicomDS DicomDS; 
       DicomDS.LoadDS(szFile, 0); 
    
       //send a store command for the GET sub-operation 
       L_TCHAR szCalling[PDU_MAX_TITLE_SIZE+1]; 
       GetAssociate()->GetCalling(szCalling, PDU_MAX_TITLE_SIZE+1); 
       CString strAE = szCalling; 
    
       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_TCHAR *)(LPCTSTR)strInstance,  
                           nPriority,  
                           (L_TCHAR *)(LPCTSTR)strAE,  
                           nMessageID,  
                           &DicomDS 
                        ); 
    
       strMsg += TEXT("SendCStoreRequest\n"); 
       AfxMessageBox(strMsg); 
       //Client sends C-Get response after receiving the CStoreResponse from the calling AE 
   }