Receive iCalendar meeting request

Mail.dll .NET email component makes receiving iCalendar meeting request fairly easy.

IMail object exposes Appointments collection that contains all appointments that were found while parsing an email.

You can use both IMAP or POP3 protocol to download emails from the server.

Here’s the simple sample showing how to process iCalendar appointments:

// C#

IMail email = new MailBuilder().CreateFromEml(client.GetMessageByUID(uid));

foreach (Appointment appointment in email.Appointments)
{
    if (appointment.Method == Method.Request)
    {
        // appointment was created
        string summary = appointment.Event.Summary;
        DateTime? start = appointment.Event.Start;
        DateTime? end = appointment.Event.End;
        string location = appointment.Event.Location;

        Console.WriteLine("{0} at {1} ({2}-{3})", summary, location, start, end);

        foreach (Participant participant in appointment.Event.Participants)
        {
            Console.WriteLine("Common name: " + participant.Cn);
            Console.WriteLine("Email: " + participant.Email);
            Console.WriteLine("Participation status: " + participant.Status);
        }
    }
    else if (appointment.Method == Method.Cancel)
    {
        // appointment was canceled
        Console.WriteLine("Event was cancelled: " + appointment.Event.UID);
        
    }
    else if (appointment.Method == Method.Reply)
    {
        // someone replied to the request
        foreach (Participant participant in appointment.Event.Participants)
        {
            if (participant.Status == ParticipationStatus.Accepted)
                Console.WriteLine("Event was accepted by: " + participant.Email);
            else if (participant.Status == ParticipationStatus.Declined)
                Console.WriteLine("Event was declined by: " + participant.Email);
        }

    }
}

' VB.NET

Dim email As IMail = New MailBuilder().CreateFromEml(client.GetMessageByUID(uid))

For Each appointment As Appointment In email.Appointments
	If appointment.Method = Method.Request Then
		' appointment was created
		Dim summary As String = appointment.[Event].Summary
		Dim start As System.Nullable(Of DateTime) = appointment.[Event].Start
		Dim [end] As System.Nullable(Of DateTime) = appointment.[Event].[End]
		Dim location As String = appointment.[Event].Location

		Console.WriteLine("{0} at {1} ({2}-{3})", summary, location, start, [end])

		For Each participant As Participant In appointment.[Event].Participants
			Console.WriteLine("Common name: " + participant.Cn)
			Console.WriteLine("Email: " + participant.Email)
			Console.WriteLine("Participation status: " + participant.Status)
		Next
	ElseIf appointment.Method = Method.Cancel Then
		' appointment was canceled

		Console.WriteLine("Event was cancelled: " + appointment.[Event].UID)
	ElseIf appointment.Method = Method.Reply Then
		' someone replied to the request
		For Each participant As Participant In appointment.[Event].Participants
			If participant.Status = ParticipationStatus.Accepted Then
				Console.WriteLine("Event was accepted by: " + participant.Email)
			ElseIf participant.Status = ParticipationStatus.Declined Then
				Console.WriteLine("Event was declined by: " + participant.Email)
			End If

		Next
	End If
Next

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