References ▼
#include "ltdic.h"
L_INT LDicomNet::SendCGetRequest(nPresentationID, nMessageID, pszClass, nPriority, pDS)
Sends a C-GET-REQ message to a peer member of a connection. This function is available in the PACS Imaging 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 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_PRIORITY_HIGH | [0x0001] High priority message. |
Pointer to the data set to be found.
| Value | Meaning |
|---|---|
| 0 | SUCCESS |
| >0 | An error occurred. Refer to Return Codes. |
Calling this function generates a call to LDicomNet::OnReceiveCGetRequest on the SCP. The SCP should respond by calling LDicomNet::SendCGetResponse which will generate a call to LDicomNet::OnReceiveCGetResponse.
You must create a data set and insert elements corresponding to the data you wish to find. The data set returned will include the entire data set that includes the requested data.
Required DLLs and Libraries
Win32, x64
This example sends an C-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__SendCGetRequestExample(LMyDicomNet *m_pDicomNet ){CString strMsg = TEXT("C-Get\n");L_INT nRet;//Choose a classCString strClassUID = UID_SC_IMAGE_STORAGE;//create the data set that encodes the identifier to be matchedLDicomDS DicomDS;DicomDS.InitDS(CLASS_UNKNOWN, 0);//Add the required elements// TAG_QUERY_RETRIEVE_LEVEL// TAG_PATIENT_NAMEpDICOMTAG pDicomTag = LDicomTag::Find(TAG_QUERY_RETRIEVE_LEVEL);pDICOMELEMENT pElement = DicomDS.InsertElement(NULL, //pDICOMELEMENT pNeighborFALSE, //L_BOOL bChildTAG_QUERY_RETRIEVE_LEVEL, //L_UINT32 nTagpDicomTag->nVR, //L_UINT16 nVRFALSE, //L_BOOL bSequence,0 //L_UINT32 nIndex);DicomDS.SetStringValue(pElement, TEXT("PATIENT"),1, DICOM_CHARACTER_SET_DEFAULT);pDicomTag = LDicomTag::Find(TAG_PATIENT_NAME);DicomDS.InsertElement(pElement, //pDICOMELEMENT pNeighborFALSE, //L_BOOL bChildTAG_PATIENT_NAME, //L_UINT32 nTagpDicomTag->nVR, //L_UINT16 nVRFALSE, //L_BOOL bSequence,0 //L_UINT32 nIndex);DicomDS.SetStringValue(pElement, TEXT("*"),1, DICOM_CHARACTER_SET_DEFAULT); //get all patients//Add the optional fields that we want returned// TAG_PATIENT_ID// TAG_PATIENT_BIRTH_DATE// TAG_PATIENT_SEX// TAG_NUMBER_OF_STUDY_RELATED_INSTANCESpDicomTag = LDicomTag::Find(TAG_PATIENT_ID);DicomDS.InsertElement(pElement, //pDICOMELEMENT pNeighborFALSE, //L_BOOL bChildTAG_PATIENT_ID, //L_UINT32 nTagpDicomTag->nVR, //L_UINT16 nVRFALSE, //L_BOOL bSequence,0 //L_UINT32 nIndex);pDicomTag = LDicomTag::Find(TAG_PATIENT_BIRTH_DATE);DicomDS.InsertElement(pElement, //pDICOMELEMENT pNeighborFALSE, //L_BOOL bChildTAG_PATIENT_BIRTH_DATE, //L_UINT32 nTagpDicomTag->nVR, //L_UINT16 nVRFALSE, //L_BOOL bSequence,0 //L_UINT32 nIndex);pDicomTag = LDicomTag::Find(TAG_PATIENT_SEX);DicomDS.InsertElement(pElement, //pDICOMELEMENT pNeighborFALSE, //L_BOOL bChildTAG_PATIENT_SEX, //L_UINT32 nTagpDicomTag->nVR, //L_UINT16 nVRFALSE, //L_BOOL bSequence,0 //L_UINT32 nIndex);pDicomTag = LDicomTag::Find( TAG_NUMBER_OF_STUDY_RELATED_INSTANCES);DicomDS.InsertElement(pElement, //pDICOMELEMENT pNeighborFALSE, //L_BOOL bChildTAG_NUMBER_OF_STUDY_RELATED_INSTANCES, //L_UINT32 nTagpDicomTag->nVR, //L_UINT16 nVRFALSE, //L_BOOL bSequence,0 //L_UINT32 nIndex);//Get the associate objectLDicomAssociate *pDicomAssociate = m_pDicomNet->GetAssociate();//Is class supported in the assocation?L_UCHAR nPresentationID = pDicomAssociate->FindAbstract((L_TCHAR *)(LPCTSTR)strClassUID);//nPresentationID must be odd--0 indicates failureif (nPresentationID==0){CString strTmp;strTmp.Format(TEXT("Abstract Syntax[%s] Not Included in the Association"), strClassUID);strMsg = strMsg + strTmp;}else//success{L_UINT16 uUniqueID = 99;m_pDicomNet->m_FileCount = 0; //used for file name in OnReceiveCStoreRequest eventnRet =m_pDicomNet->SendCGetRequest(nPresentationID,uUniqueID,(L_TCHAR *)(LPCTSTR)strClassUID,COMMAND_PRIORITY_MEDIUM,&DicomDS);if(nRet > 0)return nRet;}AfxMessageBox(strMsg);//now wait for one or more C-STORE sub-operations and finally the C-Get responsereturn DICOM_SUCCESS;}