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SendData Method (DicomNet)

Summary

Sends a Data message to a connection.

Syntax

C++

public void SendData(  
   int presentationID, 
   Leadtools.Dicom.DicomDataSet commandSet, 
   Leadtools.Dicom.DicomDataSet dataSet 
)

Public Sub SendData( _ 
   ByVal presentationID As Integer, _ 
   ByVal commandSet As Leadtools.Dicom.DicomDataSet, _ 
   ByVal dataSet As Leadtools.Dicom.DicomDataSet _ 
)

public: 
void SendData(  
   int presentationID, 
   Leadtools.Dicom.DicomDataSet^ commandSet, 
   Leadtools.Dicom.DicomDataSet^ dataSet 
)

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.

commandSet
A DicomDataSet object that contains the Command Set which specifies the actual command message.

dataSet
A DicomDataSet object that contains the actual data. This may be a null reference (Nothing in VB) if no Data Set is included.

Remarks

This is a low level means of sending DICOM messages and data. It allows you to send messages yourself, instead of using the high level message sending methods provided. For more information about sending messages, refer to Sending Messages.

Example

This is a comprehensive sample that shows how to send data over a DICOM connection.

using Leadtools; 
using Leadtools.Dicom; 
 
[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 OnReceiveData(byte presentationID, DicomDataSet cs, DicomDataSet ds) 
   { 
      DicomElement element; 
 
      Debug.Assert(cs != null, "Command set should not be null"); 
      Debug.Assert(ds != null, "Dataset should not be null"); 
 
      element = ds.FindFirstElement(null, DicomTag.PatientID, true); 
      Debug.Assert(ds != null, "Element (PatientID) should not be null"); 
      Debug.Assert(ds.GetStringValue(element, 0) == "ID", "PatientID should be ID"); 
 
      waitEvent.Set(); 
   } 
} 
 
class ServerConnection : DicomNet 
{ 
   public bool TestData = false; 
 
   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 OnReceiveData(byte presentationID, DicomDataSet cs, DicomDataSet ds) 
   { 
      DicomDataSet csResponse = new DicomDataSet(); 
      DicomElement element; 
      short[] v; 
 
      if (!TestData) 
         return; 
 
      Debug.Assert(cs != null, "Command set should not be null"); 
      Debug.Assert(ds != null, "Dataset should not be null"); 
 
      // 
      // Check command 
      // 
      element = cs.FindFirstElement(null, DicomTag.MessageID, true); 
      Debug.Assert(element != null, "Element (MessageID) should not be null"); 
      v = cs.GetShortValue(element, 0, 1); 
      Debug.Assert(v[0] == 1, "Command Field should be 1"); 
 
      element = cs.FindFirstElement(null, DicomTag.Priority, true); 
      Debug.Assert(element != null, "Element (Priority) should not be null"); 
      v = cs.GetShortValue(element, 0, 1); 
      Debug.Assert(v[0] == (short)DicomCommandPriorityType.Medium, "Priority should be 0"); 
 
      // 
      // Check Dataset 
      //            
      element = ds.FindFirstElement(null, DicomTag.PatientID, true); 
      Debug.Assert(element != null, "Element (PatientID) should not be null"); 
      Debug.Assert(ds.GetStringValue(element, 0) == "ID", "PatientID should be ID"); 
 
      cs.InitializeCommandSet(DicomCommandType.CFind, false); 
      SendData(presentationID, csResponse, ds); 
   } 
} 
 
class Server : DicomNet 
{ 
   ServerConnection client; 
 
   public Server() 
       : base(null, DicomNetSecurityeMode.None) 
   { 
   } 
 
   public bool TestData 
   { 
      get 
      { 
         if (client == null) 
            return false; 
 
         return client.TestData; 
      } 
 
      set 
      { 
         if (client != null) 
         { 
            client.TestData = value; 
         } 
      } 
   } 
 
   protected override void OnAccept(DicomExceptionCode error) 
   { 
      client = new ServerConnection(); 
 
      Accept(client); 
   } 
} 
 
public void SendDataSample() 
{ 
   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 
                                                       // Over here we can access the host (client or SCU) address by calling client.HostAddress  
                                                       // and its port by calling client.HostPort. We can also access the peer (server or SCP) 
                                                       // address by calling client.PeerAddress and its port by calling client.PeerPort 
         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); 
         long[] attributes = new long[4]; 
 
         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); 
         associate.AddPresentationContext(3, 0, DicomUidType.PatientRootQueryFind); 
         associate.AddTransfer(3, DicomUidType.ImplicitVRLittleEndian); 
         client.SendAssociateRequest(associate); 
         if (!client.Wait()) // wait for connection to finish 
         { 
            Debug.Fail("SendAssociateRequest timed out"); 
         } 
 
         byte pid = client.Association.FindAbstract(DicomUidType.PatientRootQueryFind); 
         DicomDataSet ds = new DicomDataSet(); 
         DicomDataSet cs = new DicomDataSet(); 
         DicomElement element; 
 
         cs.InitializeCommandSet(DicomCommandType.Undefined, true); 
 
         element = cs.FindFirstElement(null, DicomTag.Priority, true); 
         if (element == null) 
         { 
            element = cs.InsertElement(null, false, DicomTag.Priority, DicomVRType.UN, false, 0); 
         } 
         cs.SetConvertValue(element, DicomCommandPriorityType.Medium.ToString(), 1); 
 
         element = cs.FindFirstElement(null, DicomTag.MessageID, true); 
         if (element == null) 
         { 
            element = cs.InsertElement(null, false, DicomTag.MessageID, DicomVRType.UN, false, 0); 
         } 
         cs.SetConvertValue(element, "1", 1); 
 
         ds.Initialize(DicomClassType.PatientRootQueryPatient, DicomDataSetInitializeType.ImplicitVRLittleEndian); 
         element = ds.FindFirstElement(null, DicomTag.PatientID, true); 
         if (element == null) 
         { 
            element = ds.InsertElement(null, false, DicomTag.PatientID, DicomVRType.UN, false, 0); 
         } 
         ds.SetStringValue(element, "ID", DicomCharacterSetType.Default); 
 
         server.TestData = true; 
         client.SendData(pid, cs, ds); 
         if (!client.Wait()) // wait for NActionRequest to finish 
         { 
            Debug.Fail("SendData timed out"); 
         } 
         server.TestData = false; 
         client.CloseForced(true); 
      } 
      server.CloseForced(true); 
   } 
 
   DicomEngine.Shutdown(); 
   DicomNet.Shutdown(); 
}

Imports Leadtools 
Imports Leadtools.Dicom 
 
<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 OnReceiveData(ByVal presentationID As Byte, ByVal cs As DicomDataSet, ByVal ds As DicomDataSet) 
      Dim element As DicomElement 
 
      Debug.Assert(Not cs Is Nothing, "Command set should not be null") 
      Debug.Assert(Not ds Is Nothing, "Dataset should not be null") 
 
      element = ds.FindFirstElement(Nothing, DicomTag.PatientID, True) 
      Debug.Assert(Not ds Is Nothing, "Element (PatientID) should not be null") 
      Debug.Assert(ds.GetStringValue(element, 0) = "ID", "PatientID should be ID") 
 
      waitEvent.Set() 
   End Sub 
End Class 
 
Private Class ServerConnection : Inherits DicomNet 
   Public TestData As Boolean = False 
 
   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 OnReceiveData(ByVal presentationID As Byte, ByVal cs As DicomDataSet, ByVal ds As DicomDataSet) 
      Dim csResponse As DicomDataSet = New DicomDataSet() 
      Dim element As DicomElement 
      Dim v As Short() 
 
      If (Not TestData) Then 
         Return 
      End If 
 
      Debug.Assert(Not cs Is Nothing, "Command set should not be null") 
      Debug.Assert(Not ds Is Nothing, "Dataset should not be null") 
 
      ' 
      ' Check command 
      ' 
      element = cs.FindFirstElement(Nothing, DicomTag.MessageID, True) 
      Debug.Assert(Not element Is Nothing, "Element (MessageID) should not be null") 
      v = cs.GetShortValue(element, 0, 1) 
      Debug.Assert(v(0) = 1, "Command Field should be 1") 
 
      element = cs.FindFirstElement(Nothing, DicomTag.Priority, True) 
      Debug.Assert(Not element Is Nothing, "Element (Priority) should not be null") 
      v = cs.GetShortValue(element, 0, 1) 
      Debug.Assert(v(0) = CShort(DicomCommandPriorityType.Medium), "Priority should be 0") 
 
      ' 
      ' Check Dataset 
      '            
      element = ds.FindFirstElement(Nothing, DicomTag.PatientID, True) 
      Debug.Assert(Not element Is Nothing, "Element (PatientID) should not be null") 
      Debug.Assert(ds.GetStringValue(element, 0) = "ID", "PatientID should be ID") 
 
      cs.InitializeCommandSet(DicomCommandType.CFind, False) 
      SendData(presentationID, csResponse, ds) 
   End Sub 
End Class 
 
Private Class Server : Inherits DicomNet 
   Private client As ServerConnection 
 
   Public Sub New() 
      MyBase.New(Nothing, DicomNetSecurityeMode.None) 
   End Sub 
 
   Public Property TestData() As Boolean 
      Get 
         If client Is Nothing Then 
            Return False 
         End If 
 
         Return client.TestData 
      End Get 
 
      Set(value As Boolean) 
         If Not client Is Nothing Then 
            client.TestData = value 
         End If 
      End Set 
   End Property 
 
   Protected Overrides Sub OnAccept(ByVal [error] As DicomExceptionCode) 
      client = New ServerConnection() 
 
      Accept(client) 
   End Sub 
End Class 
 
 
Public Sub SendDataSample() 
   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 
         'Over here we can access the host (client or SCU) address by calling client.HostAddress  
         'and its port by calling client.HostPort. We can also access the peer (server or SCP) 
         'address by calling client.PeerAddress and its port by calling client.PeerPort 
         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) 
         Dim attributes As Long() = New Long(3) {} 
 
         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) 
         associate.AddPresentationContext(3, 0, DicomUidType.PatientRootQueryFind) 
         associate.AddTransfer(3, DicomUidType.ImplicitVRLittleEndian) 
         client.SendAssociateRequest(associate) 
         If (Not client.Wait()) Then ' wait for connection to finish 
            Debug.Fail("SendAssociateRequest timed out") 
         End If 
 
         Dim pid As Byte = client.Association.FindAbstract(DicomUidType.PatientRootQueryFind) 
         Dim ds As DicomDataSet = New DicomDataSet() 
         Dim cs As DicomDataSet = New DicomDataSet() 
         Dim element As DicomElement 
 
         cs.InitializeCommandSet(DicomCommandType.Undefined, True) 
 
         element = cs.FindFirstElement(Nothing, DicomTag.Priority, True) 
         If element Is Nothing Then 
            element = cs.InsertElement(Nothing, False, DicomTag.Priority, DicomVRType.UN, False, 0) 
         End If 
         cs.SetConvertValue(element, DicomCommandPriorityType.Medium.ToString(), 1) 
 
         element = cs.FindFirstElement(Nothing, DicomTag.MessageID, True) 
         If element Is Nothing Then 
            element = cs.InsertElement(Nothing, False, DicomTag.MessageID, DicomVRType.UN, False, 0) 
         End If 
         cs.SetConvertValue(element, "1", 1) 
 
         ds.Initialize(DicomClassType.PatientRootQueryPatient, DicomDataSetInitializeType.ExplicitVRLittleEndian) 
         element = ds.FindFirstElement(Nothing, DicomTag.PatientID, True) 
         If element Is Nothing Then 
            element = ds.InsertElement(Nothing, False, DicomTag.PatientID, DicomVRType.UN, False, 0) 
         End If 
         ds.SetStringValue(element, "ID", DicomCharacterSetType.Default) 
 
         server.TestData = True 
         client.SendData(pid, cs, ds) 
         If (Not client.Wait()) Then ' wait for NActionRequest to finish 
            Debug.Fail("SendData timed out") 
         End If 
         server.TestData = False 
         client.CloseForced(True) 
      End Using 
      server.CloseForced(True) 
   End Using 
 
   DicomEngine.Shutdown() 
   DicomNet.Shutdown() 
End Sub