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

Platforms

Win32, x64

See Also

Functions

Topics

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::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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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.