LDicomNet::SendNDeleteRequest

#include "ltdic.h"

L_INT LDicomNet::SendNDeleteRequest(nPresentationID, nMessageID, pszClass, pszInstance)

L_UCHAR nPresentationID;	/* presentation ID */
L_UINT16 nMessageID;	/* message ID */
L_TCHAR * pszClass;	/* class type */
L_TCHAR * pszInstance;	/* instance */

Sends an N-DELETE-REQ message to a peer member of a connection. This function is available in the PACS Imaging 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.
pszInstance	The instance of the class. A server may, for example, have three instances of the Nuclear Medicine Class. This value specifies an instance.

Returns

0	SUCCESS
>0	An error occurred. Refer to Return Codes.

Comments

Calling this function generates a call to LDicomNet::OnReceiveNDeleteRequest on the SCP. The SCP should respond by calling LDicomNet::SendNDeleteResponse which will generate a call to LDicomNet::OnReceiveNDeleteResponse.

This function requests that the SCP delete the specified SOP Instance.

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::SendNDeleteResponse, LDicomNet::OnReceiveNDeleteRequest, LDicomNet::OnReceiveNDeleteResponse
Topics:	Working with DICOM Network Connections

Example

L_INT LDicomNet__SendNDeleteRequestExample(LMyDicomNet *m_pDicomNet)
{
   //This example sends an N-Delete Request to a server
   //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
   CString strMsg = TEXT("N-Delete\n");
   L_INT nRet;
   //Choose an SOP Class to delete--in this example, choose UID_SC_IMAGE_STORAGE
  
   CString strClassUID = UID_SC_IMAGE_STORAGE;
   //Choose an SOP Instance to delete
   CString strInstanceUID = TEXT("1.2.840.113619.2.30.1.1762288927.1489.906240296.255");
   //Get the associate object
   LDicomAssociate *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 failure
   if (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;
      nRet =m_pDicomNet->SendNDeleteRequest( nPresentationID, 
                                           uUniqueID, 
                                           (L_TCHAR *)(LPCTSTR)strClassUID, 
                                           (L_TCHAR *)(LPCTSTR)strInstanceUID);
      if(nRet > 0)
         return nRet;
   }
   AfxMessageBox(strMsg);
   return DICOM_SUCCESS;
}