Home » What is the best way and recommended practices for interacting with Lotus Notes from C#

What is the best way and recommended practices for interacting with Lotus Notes from C#

Solutons:


I really do hate that NotesSession COM object.

You cannot use it in another thread than the thread it was initialized.
Threads in .NET are fibers, the real underlying thread may change at any time.

So I suggest using it this way, in a using block :

Imports Domino
Imports System.Threading

Public Class AffinitedSession
    Implements IDisposable

    Private _session As NotesSession
    Public Sub New(ByVal pass As String)
        Thread.BeginThreadAffinity()
        _session = New NotesSession()
        _session.Initialize(pass)
    End Sub

    Public ReadOnly Property NotesSession() As NotesSession
        Get
            Return _session
        End Get
    End Property

    Private disposedValue As Boolean = False        ' To detect redundant calls

    ' IDisposable
    Protected Overridable Sub Dispose(ByVal disposing As Boolean)
        If Not Me.disposedValue Then
            If disposing Then
                ' TODO: free other state (managed objects).
            End If

            ' TODO: free your own state (unmanaged objects).
            ' TODO: set large fields to null.
            _session = Nothing
            Thread.EndThreadAffinity()
        End If
        Me.disposedValue = True
    End Sub

#Region " IDisposable Support "
    ' This code added by Visual Basic to correctly implement the disposable pattern.
    Public Sub Dispose() Implements IDisposable.Dispose
        ' Do not change this code.  Put cleanup code in Dispose(ByVal disposing As Boolean) above.
        Dispose(True)
        GC.SuppressFinalize(Me)
    End Sub
#End Region

End Class

Notice the Thread.BeginThreadAffinity() and the Thread.EndThreadAffinity()

Those are your friends.

Cheers !

An Lotus Notes COM Api Reference can be found here

To get a Notes Session (The starting point) in VB.Net you can use:

Dim oSess As Object = Nothing
oSess = CreateObject("Notes.NotesSession")

I normally program in C#, for operating with COM I prefer VB.Net

It is better to access all COM servers from the same thread, unless you are certain that is will not cause any trouble.

Take a look at NotesSQL:

http://www.ibm.com/developerworks/lotus/products/notesdomino/notessql/

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