LDicomNet::SendNDeleteRequest

Summary

Sends an N-DELETE-REQ message to a peer member of a connection. This function is available in the PACS Imaging Toolkit.

Syntax

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

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 specifies an instance.

Returns

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

Platforms

Win32, x64

See Also

Functions

• LDicomNet::SendNDeleteResponse
• LDicomNet::OnReceiveNDeleteRequest
• LDicomNet::OnReceiveNDeleteResponse

Topics

• Working with DICOM Network Connections

Example

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)
   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_INT LDicomNet__SendNDeleteRequestExample(LMyDicomNet *m_pDicomNet) 
   { 
      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; 
   }