SendCEchoRequest Method (DicomNet)

Sends a C-ECHO-REQ message to a peer member of a connection.

Syntax

Visual Basic
C#
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public void SendCEchoRequest( 
   byte presentationID,
   int messageID,
   string affectedClass
)

'Declaration
 
Public Sub SendCEchoRequest( _
   ByVal presentationID As Byte, _
   ByVal messageID As Integer, _
   ByVal affectedClass As String _
)

'Usage
 
Dim instance As DicomNet
Dim presentationID As Byte
Dim messageID As Integer
Dim affectedClass As String
 
instance.SendCEchoRequest(presentationID, messageID, affectedClass)

public void SendCEchoRequest( 
   byte presentationID,
   int messageID,
   string affectedClass
)

ObjectiveC Syntax

 function Leadtools.Dicom.Networking.DicomNet.SendCEchoRequest( 
   presentationID ,
   messageID ,
   affectedClass 
)

public:
void SendCEchoRequest( 
   byte presentationID,
   int messageID,
   String^ affectedClass
)

Parameters

presentationID: The Presentation Context ID. The ID provides information about both the class type of the data and the Transfer Syntax to use when transferring the data.
messageID: The 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.
affectedClass: The class affected by the request. This will be a SOP Class or a Meta SOP Class.

Remarks

Calling this method generates a call to IDicomEvents.OnReceiveCEchoRequest on the SCP. The SCP should respond by calling SendCEchoResponse which will generate a call to IDicomEvents.OnReceiveCEchoResponse.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

<StructLayout(LayoutKind.Sequential)> _
Public Structure MSG
    Public hwnd As IntPtr
    Public message As UInteger
    Public wParam As IntPtr
    Public lParam As IntPtr
    Public time As UInteger
    Public p As System.Drawing.Point
End Structure
Public Enum WaitReturn
    Complete
    Timeout
End Enum

Private Class Utils
 <DllImport("user32.dll")> _
 Shared Function PeekMessage(<System.Runtime.InteropServices.Out()> ByRef lpMsg As MSG, ByVal hWnd As IntPtr, ByVal wMsgFilterMin As UInteger, _
                                ByVal wMsgFilterMax As UInteger, ByVal wRemoveMsg As UInteger) As <MarshalAs(UnmanagedType.Bool)> Boolean
 End Function

    <DllImport("user32.dll")> _
    Shared Function TranslateMessage(ByRef lpMsg As MSG) As Boolean
    End Function
    <DllImport("user32.dll")> _
    Shared Function DispatchMessage(ByRef lpmsg As MSG) As IntPtr
    End Function

    Private Const PM_REMOVE As UInteger = 1

    Public Shared Function WaitForComplete(ByVal mill As Double, ByVal wh As WaitHandle) As WaitReturn
        Dim goal As TimeSpan = New TimeSpan(DateTime.Now.AddMilliseconds(mill).Ticks)

        Do
            Dim msg As MSG = New MSG()

            If PeekMessage(msg, IntPtr.Zero, 0, 0, PM_REMOVE) Then
                TranslateMessage(msg)
                DispatchMessage(msg)
            End If

            If wh.WaitOne(New TimeSpan(0, 0, 0), False) Then
                Return WaitReturn.Complete
            End If

            If goal.CompareTo(New TimeSpan(DateTime.Now.Ticks)) < 0 Then
                Return WaitReturn.Timeout
            End If

        Loop While True
    End Function
End Class

Private Class Client : Inherits DicomNet
    Private _LastError As DicomExceptionCode = DicomExceptionCode.Success
    Private waitEvent As AutoResetEvent = New AutoResetEvent(False)

    Public Sub New()
        MyBase.New(Nothing, DicomNetSecurityeMode.None)
    End Sub

    Public ReadOnly Property LastError() As DicomExceptionCode
        Get
            Return _LastError
        End Get
    End Property

    Public Function Wait() As Boolean
        Dim ret As WaitReturn

        _LastError = DicomExceptionCode.Success
        ret = Utils.WaitForComplete((5 * 60) * 1000, waitEvent)

        Return (ret = WaitReturn.Complete)
    End Function

    Protected Overrides Sub OnConnect(ByVal [error] As DicomExceptionCode)
        _LastError = [error]
        waitEvent.Set()
    End Sub

    Protected Overrides Sub OnReceiveAssociateAccept(ByVal association As DicomAssociate)
        waitEvent.Set()
    End Sub

    Protected Overrides Sub OnReceiveReleaseResponse()
        waitEvent.Set()
    End Sub

 Protected Overrides Sub OnReceiveCEchoResponse(ByVal presentationID As Byte, ByVal messageID As Integer, ByVal affectedClass As String, _
                                                ByVal status As DicomCommandStatusType)
    Debug.Assert(presentationID = 1, "Presentation id should be 1")
    Debug.Assert(messageID = 1, "Message ID should be 1")
    Debug.Assert(affectedClass = DicomUidType.VerificationClass, "Affected class should be " & DicomUidType.VerificationClass)
    waitEvent.Set()
 End Sub
End Class

Private Class ServerConnection : Inherits DicomNet
    Public Sub New()
        MyBase.New(Nothing, DicomNetSecurityeMode.None)
    End Sub

    Protected Overrides Sub OnReceiveAssociateRequest(ByVal association As DicomAssociate)
        Dim retAssociation As DicomAssociate = New DicomAssociate(False)

        Debug.Assert(association.Called = "ServerTest", "Called AETitle should be ServerTest")
        Debug.Assert(association.Calling = "ClientTest", "Calling AETitle should be ClientTest")
        Debug.Assert(association.ImplementClass = "1.2.840.114257.1", "Implementation class should be 1.2.840.114257.1")
        Debug.Assert(association.ImplementationVersionName = "1", "Implementation version should be 1")
        Debug.Assert(association.MaxLength = &H100000, "Max length should be 0x100000")
        Debug.Assert(association.GetAbstract(1) = DicomUidType.VerificationClass, "Presentation index 1 should be " & DicomUidType.VerificationClass)
        Debug.Assert(association.GetTransfer(1, 0) = DicomUidType.ImplicitVRLittleEndian, "Abstract Syntax (1,0) should be " & DicomUidType.ImplicitVRLittleEndian)

        '
        ' Build our Association Accept
        '
        retAssociation.Called = association.Called
        retAssociation.Calling = association.Calling
        retAssociation.ImplementClass = association.ImplementClass
        retAssociation.ImplementationVersionName = association.ImplementationVersionName
        Dim x As Integer = 0
        Do While x < association.PresentationContextCount
            Dim id As Byte = association.GetPresentationContextID(x)
            Dim abSyntax As String = association.GetAbstract(id)
            Dim trSyntax As String = DicomUidType.ImplicitVRLittleEndian

            retAssociation.AddPresentationContext(id, 0, abSyntax)
            If association.GetTransferCount(id) > 0 Then
                trSyntax = association.GetTransfer(id, 0)
            End If

            retAssociation.AddTransfer(id, trSyntax)
            x += 1
        Loop
        SendAssociateAccept(retAssociation)
    End Sub

    Protected Overrides Sub OnReceiveReleaseRequest()
        SendReleaseResponse()
    End Sub

    Protected Overrides Sub OnReceiveCEchoRequest(ByVal presentationID As Byte, ByVal messageID As Integer, ByVal affectedClass As String)
        Debug.Assert(presentationID = 1, "Presentation id should be 1")
        Debug.Assert(messageID = 1, "Message ID should be 1")
        Debug.Assert(affectedClass = DicomUidType.VerificationClass, "Affected class should be " & DicomUidType.VerificationClass)

        SendCEchoResponse(presentationID, messageID, DicomUidType.VerificationClass, DicomCommandStatusType.Success)
    End Sub
End Class

Private Class Server : Inherits DicomNet
    Private client As ServerConnection

    Public Sub New()
        MyBase.New(Nothing, DicomNetSecurityeMode.None)
    End Sub

    Protected Overrides Sub OnAccept(ByVal [error] As DicomExceptionCode)
        client = New ServerConnection()

        Accept(client)
    End Sub
End Class



Public Sub SendCEchoRequestSample()
    DicomEngine.Startup()
    DicomNet.Startup()

    Using server As Server = New Server()
        Using client As Client = New Client()
            '
            ' Connect to server
            '
            server.Listen("127.0.0.1", 104, 1) ' start server
            client.Connect(Nothing, 1000, "127.0.0.1", 104) ' connect to server
            If (Not client.Wait()) Then ' wait for connection to finish
                Debug.Fail("Connection timed out")
            End If
            Debug.Assert(client.LastError = DicomExceptionCode.Success, "Connection failed")
            Debug.Assert(client.IsConnected(), "Client not connected")

            '
            ' Send associate request
            '
            Dim associate As DicomAssociate = New DicomAssociate(True)

            associate.Called = "ServerTest"
            associate.Calling = "ClientTest"
            associate.ImplementClass = "1.2.840.114257.1"
            associate.ImplementationVersionName = "1"
            associate.MaxLength = &H100000
            associate.AddPresentationContext(1, 0, DicomUidType.VerificationClass)
            associate.AddTransfer(1, DicomUidType.ImplicitVRLittleEndian)
            client.SendAssociateRequest(associate)
            If (Not client.Wait()) Then ' wait for connection to finish
                Debug.Fail("SendAssociateRequest timed out")
            End If

            '
            ' Send Echo Request
            '
            Dim pid As Byte = client.Association.FindAbstract(DicomUidType.VerificationClass)

            client.SendCEchoRequest(pid, 1, DicomUidType.VerificationClass)
            If (Not client.Wait()) Then ' wait for connection to finish
                Debug.Fail("SendCEchoRequest timed out")
            End If

            '
            ' SendReleaseRequest
            '
            client.SendReleaseRequest()
            If (Not client.Wait()) Then ' wait for connection to finish
                Debug.Fail("SendReleaseRequest timed out")
            End If

            client.CloseForced(True)
        End Using

        server.CloseForced(True)
    End Using

    DicomEngine.Shutdown()
    DicomNet.Shutdown()
End Sub

[StructLayout(LayoutKind.Sequential)]
public struct MSG
{
    public IntPtr hwnd;
    public uint message;
    public IntPtr wParam;
    public IntPtr lParam;
    public uint time;
    public System.Drawing.Point p;
}
public enum WaitReturn
{
    Complete,
    Timeout,
}

class Utils
{
    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool PeekMessage(out MSG lpMsg, IntPtr hWnd,
                                   uint wMsgFilterMin, uint wMsgFilterMax,
                                   uint wRemoveMsg);

    [DllImport("user32.dll")]
    static extern bool TranslateMessage([In] ref MSG lpMsg);
    [DllImport("user32.dll")]
    static extern IntPtr DispatchMessage([In] ref MSG lpmsg);

    const uint PM_REMOVE = 1;

    public static WaitReturn WaitForComplete(double mill, WaitHandle wh)
    {
        TimeSpan goal = new TimeSpan(DateTime.Now.AddMilliseconds(mill).Ticks);

        do
        {
            MSG msg = new MSG();

            if (PeekMessage(out msg, IntPtr.Zero, 0, 0, PM_REMOVE))
            {
                TranslateMessage(ref msg);
                DispatchMessage(ref msg);
            }

            if (wh.WaitOne(new TimeSpan(0, 0, 0), false))
            {
                return WaitReturn.Complete;
            }

            if (goal.CompareTo(new TimeSpan(DateTime.Now.Ticks)) < 0)
            {
                return WaitReturn.Timeout;
            }

        } while (true);
    }
}

class Client : DicomNet
{
    DicomExceptionCode _LastError = DicomExceptionCode.Success;
    AutoResetEvent waitEvent = new AutoResetEvent(false);

    public Client()
        : base(null, DicomNetSecurityeMode.None)
    {
    }

    public DicomExceptionCode LastError
    {
        get
        {
            return _LastError;
        }
    }

    public bool Wait()
    {
        WaitReturn ret;

        _LastError = DicomExceptionCode.Success;
        ret = Utils.WaitForComplete((5 * 60) * 1000, waitEvent);

        return (ret == WaitReturn.Complete);
    }

    protected override void OnConnect(DicomExceptionCode error)
    {               
        _LastError = error;
        waitEvent.Set();
    }

    protected override void OnReceiveAssociateAccept(DicomAssociate association)
    {
        waitEvent.Set();
    }            

    protected override void OnReceiveReleaseResponse()
    {
        waitEvent.Set();
    }

    protected override void OnReceiveCEchoResponse(byte presentationID, int messageID, string affectedClass, DicomCommandStatusType status)
    {                
        Debug.Assert(presentationID == 1, "Presentation id should be 1");
        Debug.Assert(messageID == 1, "Message ID should be 1");
        Debug.Assert(affectedClass == DicomUidType.VerificationClass, "Affected class should be " + DicomUidType.VerificationClass);
        waitEvent.Set();
    }
}

class ServerConnection : DicomNet
{
    public ServerConnection()
        : base(null, DicomNetSecurityeMode.None)
    {                
    }

    protected override void OnReceiveAssociateRequest(DicomAssociate association)
    {
        DicomAssociate retAssociation = new DicomAssociate(false);                

        Debug.Assert(association.Called == "ServerTest", "Called AETitle should be ServerTest");
        Debug.Assert(association.Calling == "ClientTest", "Calling AETitle should be ClientTest");
        Debug.Assert(association.ImplementClass == "1.2.840.114257.1", "Implementation class should be 1.2.840.114257.1");
        Debug.Assert(association.ImplementationVersionName == "1", "Implementation version should be 1");
        Debug.Assert(association.MaxLength == 0x100000, "Max length should be 0x100000");
        Debug.Assert(association.GetAbstract(1) == DicomUidType.VerificationClass, "Presentation index 1 should be " + DicomUidType.VerificationClass);
        Debug.Assert(association.GetTransfer(1, 0) == DicomUidType.ImplicitVRLittleEndian, "Abstract Syntax (1,0) should be " + DicomUidType.ImplicitVRLittleEndian);

        //
        // Build our Association Accept
        //

        retAssociation.Called = association.Called;
        retAssociation.Calling = association.Calling;
        retAssociation.ImplementClass = association.ImplementClass;
        retAssociation.ImplementationVersionName = association.ImplementationVersionName;
        for (int x = 0; x < association.PresentationContextCount; x++)
        {
            byte id = association.GetPresentationContextID(x);
            string abSyntax = association.GetAbstract(id);
            string trSyntax = DicomUidType.ImplicitVRLittleEndian;

            retAssociation.AddPresentationContext(id, 0, abSyntax);
            if (association.GetTransferCount(id) > 0)
            {
                trSyntax = association.GetTransfer(id, 0);
            }

            retAssociation.AddTransfer(id, trSyntax);
        }
        SendAssociateAccept(retAssociation);
    }

    protected override void OnReceiveReleaseRequest()
    {                
        SendReleaseResponse();
    }

    protected override void OnReceiveCEchoRequest(byte presentationID, int messageID, string affectedClass)
    {                
        Debug.Assert(presentationID == 1, "Presentation id should be 1");
        Debug.Assert(messageID == 1, "Message ID should be 1");
        Debug.Assert(affectedClass == DicomUidType.VerificationClass, "Affected class should be " + DicomUidType.VerificationClass);

        SendCEchoResponse(presentationID, messageID, DicomUidType.VerificationClass, DicomCommandStatusType.Success);
    }
}

class Server : DicomNet
{
    ServerConnection client;

    public Server()
        : base(null, DicomNetSecurityeMode.None)
    {
    }

    protected override void OnAccept(DicomExceptionCode error)
    {
        client = new ServerConnection();

        Accept(client);
    }
}


public void SendCEchoRequestSample()
{
    DicomEngine.Startup();
    DicomNet.Startup();

    using(Server server = new Server())
    {
        using(Client client = new Client())
        {
            //
            // Connect to server
            //

            server.Listen("127.0.0.1", 104, 1); // start server
            client.Connect(null, 1000, "127.0.0.1", 104); // connect to server
            if (!client.Wait()) // wait for connection to finish
            {
                Debug.Fail("Connection timed out");
            }
            Debug.Assert(client.LastError == DicomExceptionCode.Success, "Connection failed");
            Debug.Assert(client.IsConnected(), "Client not connected");

            //
            // Send associate request
            //

            DicomAssociate associate = new DicomAssociate(true);

            associate.Called = "ServerTest";
            associate.Calling = "ClientTest";
            associate.ImplementClass = "1.2.840.114257.1";
            associate.ImplementationVersionName = "1";
            associate.MaxLength = 0x100000;
            associate.AddPresentationContext(1, 0, DicomUidType.VerificationClass);
            associate.AddTransfer(1, DicomUidType.ImplicitVRLittleEndian);
            client.SendAssociateRequest(associate);
            if (!client.Wait()) // wait for connection to finish
            {
                Debug.Fail("SendAssociateRequest timed out");
            }

            //
            // Send Echo Request
            //

            byte pid = client.Association.FindAbstract(DicomUidType.VerificationClass);

            client.SendCEchoRequest(pid, 1, DicomUidType.VerificationClass);
            if (!client.Wait()) // wait for connection to finish
            {
                Debug.Fail("SendCEchoRequest timed out");
            }

            //
            // SendReleaseRequest
            //

            client.SendReleaseRequest();
            if (!client.Wait()) // wait for connection to finish
            {
                Debug.Fail("SendReleaseRequest timed out");
            }

            client.CloseForced(true);
        }                

        server.CloseForced(true);
    }

    DicomEngine.Shutdown();
    DicomNet.Shutdown();
}

public enum WaitReturn
{
    Complete,
    Timeout,
}
class Utils
{
    public static WaitReturn WaitForComplete(int ms, WaitHandle wh)
    {
        TimeSpan goal = new TimeSpan(DateTime.Now.AddMilliseconds(ms).Ticks);

        do
        {

            if (wh.WaitOne(ms))
            {
                return WaitReturn.Complete;
            }

            if (goal.CompareTo(new TimeSpan(DateTime.Now.Ticks)) < 0)
            {
                return WaitReturn.Timeout;
            }

        } while (true);
    }
}

class Client : IDicomEvents
{
    public DicomNet net;
    DicomExceptionCode _LastError = DicomExceptionCode.Success;
    AutoResetEvent waitEvent = new AutoResetEvent(false);

    public Client()
    {
        net = new DicomNet(string.Empty, this);
    }

    public DicomExceptionCode LastError
    {
        get
        {
            return _LastError;
        }
    }

    public bool Wait()
    {
        WaitReturn ret;

        _LastError = DicomExceptionCode.Success;
        ret = Utils.WaitForComplete((5 * 60) * 1000, waitEvent);

        return (ret == WaitReturn.Complete);
    }

    public void OnConnect(DicomExceptionCode error, DicomNet net)
    {
        Debug.WriteLine("Client::OnConnect");
        _LastError = error;
        waitEvent.Set();
    }

    public void OnReceiveAssociateAccept(DicomAssociate association, DicomNet net)
    {
        Debug.WriteLine("Client::OnReceiveAssociateAccept");
        waitEvent.Set();
    }

    public void OnReceiveReleaseResponse(DicomNet net)
    {
        Debug.WriteLine("Client::OnReceiveReleaseResponse");
        waitEvent.Set();
    }

    public void OnReceiveCEchoResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, DicomNet net)
    {
        Debug.WriteLine("Client::OnReceiveCEchoResponse");                
        Debug.Assert(presentationId == 1, "Presentation id should be 1");
        Debug.Assert(messageId == 1, "Message ID should be 1");
        Debug.Assert(affectedClass == DicomUidType.VerificationClass, "Affected class should be " + DicomUidType.VerificationClass);
        waitEvent.Set();
    }

    public void OnAccept(DicomExceptionCode error, DicomNet net, object hHandle)
    {
        // Not Used
    }

    public void OnClose(DicomExceptionCode error, DicomNet net)
    {
        // Not Used
    }

    public void OnReceive(DicomExceptionCode error, DicomPduType type, byte[] buffer, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveAbort(DicomAbortSourceType source, DicomAbortReasonType reason, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveAssociateReject(DicomAssociateRejectResultType result, DicomAssociateRejectSourceType source, DicomAssociateRejectReasonType reason, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveAssociateRequest(DicomAssociate association, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCCancelRequest(byte presentationId, ushort messageId, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCEchoRequest(byte presentationId, ushort messageId, string affectedClass, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCFindRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCFindResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCGetRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCGetResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, ushort remaining, ushort completed, ushort failed, ushort warning, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCMoveRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, string MoveAE, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCMoveResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, ushort remaining, ushort completed, ushort failed, ushort warning, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCStoreRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandPriorityType priority, string MoveAE, ushort moveMessageId, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCStoreResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveData(byte presentationId, DicomDataSet commandset, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNActionRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, ushort action, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNActionResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, ushort action, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNCreateRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNCreateResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNDeleteRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNDeleteResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNGetRequest(byte presentationID, ushort messageID, string affectedClass, string instance, uint[] attributes, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNGetResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNReportRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, ushort dicomevent, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNReportResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, ushort dicomevent, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNSetRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNSetResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveReleaseRequest(DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveUnknown(byte presentationId, DicomDataSet commandset, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnSend(DicomExceptionCode error, DicomPduType type, uint bytes, DicomNet net)
    {
        // Not Used
    }
}

class ServerConnection : IDicomEvents
{
    public DicomNet net;

    public ServerConnection()
    {
        net = new DicomNet(string.Empty, this);
    }

    public void OnReceiveAssociateRequest(DicomAssociate association, DicomNet net)
    {
        Debug.WriteLine("ServerConnection::OnReceiveAssociateRequest");
        DicomAssociate retAssociation = new DicomAssociate(false);

        Debug.Assert(association.Called == "ServerTest", "Called AETitle should be ServerTest");
        Debug.Assert(association.Calling == "ClientTest", "Calling AETitle should be ClientTest");
        Debug.Assert(association.ImplementClass == "1.2.840.114257.1", "Implementation class should be 1.2.840.114257.1");
        Debug.Assert(association.ImplementationVersionName == "1", "Implementation version should be 1");
        Debug.Assert(association.MaxLength == 0x100000, "Max length should be 0x100000");
        Debug.Assert(association.GetAbstract(1) == DicomUidType.VerificationClass, "Presentation index 1 should be " + DicomUidType.VerificationClass);
        Debug.Assert(association.GetTransfer(1, 0) == DicomUidType.ImplicitVRLittleEndian, "Abstract Syntax (1,0) should be " + DicomUidType.ImplicitVRLittleEndian);

        //
        // Build our Association Accept
        //

        retAssociation.Called = association.Called;
        retAssociation.Calling = association.Calling;
        retAssociation.ImplementClass = association.ImplementClass;
        retAssociation.ImplementationVersionName = association.ImplementationVersionName;
        for (int x = 0; x < association.PresentationContextCount; x++)
        {
            byte id = association.GetPresentationContextID(x);
            string abSyntax = association.GetAbstract(id);
            string trSyntax = DicomUidType.ImplicitVRLittleEndian;

            retAssociation.AddPresentationContext(id, 0, abSyntax);
            if (association.GetTransferCount(id) > 0)
            {
                trSyntax = association.GetTransfer(id, 0);
            }

            retAssociation.AddTransfer(id, trSyntax);
        }

        Debug.WriteLine("ServerConnection::SendAssociateAccept");
        net.SendAssociateAccept(retAssociation);
    }

    public void OnReceiveReleaseRequest(DicomNet net)
    {
        Debug.WriteLine("ServerConnection::OnReceiveReleaseRequest");
        Debug.WriteLine("ServerConnection::SendReleaseResponse");
        net.SendReleaseResponse();
    }

    public void OnReceiveCEchoRequest(byte presentationId, ushort messageId, string affectedClass, DicomNet net)
    {
        Debug.WriteLine("ServerConnection::OnReceiveCEchoRequest");
        Debug.Assert(presentationId == 1, "Presentation id should be 1");
        Debug.Assert(messageId == 1, "Message ID should be 1");
        Debug.Assert(affectedClass == DicomUidType.VerificationClass, "Affected class should be " + DicomUidType.VerificationClass);

        Debug.WriteLine("ServerConnection::SendReleaseResponse");
        net.SendCEchoResponse(presentationId, messageId, DicomUidType.VerificationClass, DicomCommandStatusType.Success);
    }

    public void OnAccept(DicomExceptionCode error, DicomNet net, object hHandle)
    {
        // Not Used
    }

    public void OnClose(DicomExceptionCode error, DicomNet net)
    {
        // Not Used
    }

    public void OnConnect(DicomExceptionCode error, DicomNet net)
    {
        // Not Used
    }

    public void OnReceive(DicomExceptionCode error, DicomPduType type, byte[] buffer, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveAbort(DicomAbortSourceType source, DicomAbortReasonType reason, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveAssociateAccept(DicomAssociate association, DicomNet net)
    {
        Debug.WriteLine("ServerConnection::OnReceiveAssociateAccept");
        // Not Used
    }

    public void OnReceiveAssociateReject(DicomAssociateRejectResultType result, DicomAssociateRejectSourceType source, DicomAssociateRejectReasonType reason, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCCancelRequest(byte presentationId, ushort messageId, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCEchoResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCFindRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCFindResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCGetRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCGetResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, ushort remaining, ushort completed, ushort failed, ushort warning, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCMoveRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, string MoveAE, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCMoveResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, ushort remaining, ushort completed, ushort failed, ushort warning, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCStoreRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandPriorityType priority, string MoveAE, ushort moveMessageId, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCStoreResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveData(byte presentationId, DicomDataSet commandset, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNActionRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, ushort action, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNActionResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, ushort action, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNCreateRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNCreateResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNDeleteRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNDeleteResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNGetRequest(byte presentationID, ushort messageID, string affectedClass, string instance, uint[] attributes, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNGetResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNReportRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, ushort dicomevent, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNReportResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, ushort dicomevent, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNSetRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNSetResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveReleaseResponse(DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveUnknown(byte presentationId, DicomDataSet commandset, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnSend(DicomExceptionCode error, DicomPduType type, uint bytes, DicomNet net)
    {
        // Not Used
    }
}

class Server : IDicomEvents
{
    public DicomNet net;

    ServerConnection client;

    public Server()
    {
        net = new DicomNet(string.Empty, this);
    }

    public void OnAccept(DicomExceptionCode error, DicomNet net, object hHandle)
    {
        Debug.WriteLine("Server::OnAccept");
        client = new ServerConnection();

        Debug.WriteLine("Server Accepting Connection");
        net.Accept(client.net, hHandle);
    }


    public void OnClose(DicomExceptionCode error, DicomNet net)
    {
        // Not Used
    }

    public void OnConnect(DicomExceptionCode error, DicomNet net)
    {
        // Not Used
    }

    public void OnReceive(DicomExceptionCode error, DicomPduType type, byte[] buffer, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveAbort(DicomAbortSourceType source, DicomAbortReasonType reason, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveAssociateAccept(DicomAssociate association, DicomNet net)
    {
        Debug.WriteLine("Server::OnReceiveAssociateAccept");
        // Not Used
    }

    public void OnReceiveAssociateReject(DicomAssociateRejectResultType result, DicomAssociateRejectSourceType source, DicomAssociateRejectReasonType reason, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveAssociateRequest(DicomAssociate association, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCCancelRequest(byte presentationId, ushort messageId, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCEchoRequest(byte presentationId, ushort messageId, string affectedClass, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCEchoResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCFindRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCFindResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCGetRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCGetResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, ushort remaining, ushort completed, ushort failed, ushort warning, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCMoveRequest(byte presentationId, ushort messageId, string affectedClass, DicomCommandPriorityType priority, string MoveAE, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCMoveResponse(byte presentationId, ushort messageId, string affectedClass, DicomCommandStatusType status, ushort remaining, ushort completed, ushort failed, ushort warning, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCStoreRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandPriorityType priority, string MoveAE, ushort moveMessageId, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveCStoreResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveData(byte presentationId, DicomDataSet commandset, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNActionRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, ushort action, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNActionResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, ushort action, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNCreateRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNCreateResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNDeleteRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNDeleteResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNGetRequest(byte presentationID, ushort messageID, string affectedClass, string instance, uint[] attributes, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNGetResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNReportRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, ushort dicomevent, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNReportResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, ushort dicomevent, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNSetRequest(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveNSetResponse(byte presentationId, ushort messageId, string affectedClass, string Instance, DicomCommandStatusType status, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveReleaseRequest(DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveReleaseResponse(DicomNet net)
    {
        // Not Used
    }

    public void OnReceiveUnknown(byte presentationId, DicomDataSet commandset, DicomDataSet dataset, DicomNet net)
    {
        // Not Used
    }

    public void OnSend(DicomExceptionCode error, DicomPduType type, uint bytes, DicomNet net)
    {
        // Not Used
    }
}

[TestMethod]
public void SendCEchoRequestSample()
{
    DicomEngine.Startup();
    DicomNet.Startup();

    Server server = new Server();
    Client client = new Client();

    //
    // Connect to server
    //

    server.net.Listen("127.0.0.1", 104, 1); // start server

    Debug.WriteLine("Client::Send Connect");
    client.net.Connect(string.Empty, 1000, "127.0.0.1", 104); // connect to server
    if (!client.Wait()) // wait for connection to finish
    {
        Debug.WriteLine("Connection timed out");
    }
    Debug.Assert(client.LastError == DicomExceptionCode.Success, "Connection failed");
    Debug.Assert(client.net.IsConnected(), "Client not connected");

    //
    // Send associate request
    //

    DicomAssociate associate = new DicomAssociate(true);

    associate.Called = "ServerTest";
    associate.Calling = "ClientTest";
    associate.ImplementClass = "1.2.840.114257.1";
    associate.ImplementationVersionName = "1";
    associate.MaxLength = 0x100000;
    associate.AddPresentationContext(1, 0, DicomUidType.VerificationClass);
    associate.AddTransfer(1, DicomUidType.ImplicitVRLittleEndian);

    Debug.WriteLine("Client::SendAssociateRequest");
    client.net.SendAssociateRequest(associate);
    if (!client.Wait()) // wait for connection to finish
    {
        Debug.WriteLine("SendAssociateRequest timed out");
    }

    //
    // Send Echo Request
    //

    byte pid = client.net.Association.FindAbstract(DicomUidType.VerificationClass);

    Debug.WriteLine("Client::SendCEchoRequest");
    client.net.SendCEchoRequest(pid, 1, DicomUidType.VerificationClass);
    if (!client.Wait()) // wait for connection to finish
    {
        Debug.WriteLine("SendCEchoRequest timed out");
    }

    //
    // SendReleaseRequest
    //

    Debug.WriteLine("Client::SendReleaseRequest");
    client.net.SendReleaseRequest();
    if (!client.Wait()) // wait for connection to finish
    {
        Debug.WriteLine("SendReleaseRequest timed out");
    }

    client.net.CloseForced(true);

    server.net.CloseForced(true);

    DicomEngine.Shutdown();
    DicomNet.Shutdown();
}

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DicomNet Class
DicomNet Members
SendCEchoResponse Method
OnReceiveCEchoRequest Method
OnReceiveCEchoResponse Method