#include "ltdic.h"
L_INT LDicomNet::SendNGetRequest(nPresentationID, nMessageID, pszClass, pszInstance, pnAttribute, nCount)
Sends an N-GET-REQ message to a peer member of a connection. 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.
Value | Meaning |
---|---|
0 | SUCCESS |
>0 | An error occurred. Refer to Return Codes. |
Calling this function generates a call to LDicomNet::OnReceiveNGetRequest on the SCP. The SCP should respond by calling LDicomNet::SendNGetResponse which will generate a call to LDicomNet::OnReceiveNGetResponse.
Required DLLs and Libraries
Win32, x64
This example sends an N-Get Request to a server 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_INT LDicomNet__SendNGetRequestExample(LMyDicomNet *m_pDicomNet)
{
L_INT nRet;
CString strMsg = TEXT("N-Get\n");
//Get the associate object
LDicomAssociate *pDicomAssociate = m_pDicomNet->GetAssociate();
//Choose an SOP Class to find
CString strClassUID = UID_SC_IMAGE_STORAGE;
//Is class supported in the assocation?
L_UCHAR nPresentationID = pDicomAssociate->FindAbstract((L_TCHAR *)(LPCTSTR)strClassUID);
//nPresentationID must be odd--0 indicates failure
if (nPresentationID==0)
{
CString strTmp;
strTmp.Format(TEXT("Abstract Syntax[%s] Not Included in the Association"), strClassUID);
strMsg = strMsg + strTmp;
}
else //success
{
//Create a list of the identifiers that you wish to get from the server
CString strGetFile = MAKE_IMAGE_PATH(TEXT("IMAGE1.dcm"));
CString strInstanceUID = TEXT("1.1.1.1");
L_UINT16 uUniqueID = 99;
L_UINT32 Attributes[] = { TAG_PATIENT_NAME,
TAG_PATIENT_ID,
TAG_PATIENT_SEX,
TAG_NUMBER_OF_STUDY_RELATED_INSTANCES };
L_UINT16 uNumAttributes = sizeof(Attributes) / sizeof(L_UINT32);
//global variable to count results
m_pDicomNet->m_FileCount = 0;
nRet =m_pDicomNet->SendNGetRequest( nPresentationID,
uUniqueID,
(L_TCHAR *)(LPCTSTR)strClassUID,
(L_TCHAR *)(LPCTSTR)strInstanceUID,
Attributes,
uNumAttributes);
if(nRet > 0)
return nRet;
strMsg += TEXT("SendNGetRequest\n");
}
AfxMessageBox(strMsg);
return DICOM_SUCCESS;
}
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