Creating Outlook Appointment Programmatically in C#

The first and foremost thing in creating a Appointment is to Add reference to the library, Microsoft.Office.Interop.Outlook.dll. Find how to download here.

Once done with referencing the Library to your forms application , Use the Library by adding the code,

Outlook= Using Microsoft.Office.Interop.Outlook  

Done with all these steps ?? Creating an meeting Appointment is easy !!!.

Add the Following piece of code,to create an appointment.

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/// this represents the entire outlook application. 

Outlook.Application Application = new Outlook.Application();

/// Create a new appointment. 
 Outlook.AppointmentItem newAppointment =(Outlook.AppointmentItem)
                Application.CreateItem(Outlook.OlItemType.olAppointmentItem);

/// Set the Start and End date of the appointment.
 newAppointment.Start =DateTime.Now;
 newAppointment.End = DateTime.Now.AddDays(1);

/// Set the all-day event property.
newAppointment.AllDayEvent = false;

/// set the Location,Subject and Body of the Appointment.
newAppointment.Location ="TestLocation";
 newAppointment.Subject="Meeting";
 newAppointment.Body="Appointment body";

/// set the Busy status during the time period
 newAppointment.BusyStatus = Microsoft.Office.Interop.Outlook.OlBusyStatus.olFree;
 newAppointment.Save();

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The appointment will be saved in your calendar.

Note:- Do not Create an All day event unless necessary.

Want to send Invitee to others ??

Add the Code below 

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///create Recipients for the meeting request.

Outlook.Recipients sendTo = newAppointment.Recipients; 

/// Add invitee's.

Outlook.Recipient sentInvite = null; 

sentInvite = sentTo.Add("Dave@Example.com"); // Email of the Invitee. 

// Recipient type Required.

 sentInvite.Type = (int)Outlook.OlMeetingRecipientType.olRequired; 

sentInvite = sentTo.Add("Dave@Example.com"); // Email of the Invitee.

// Recipient type Optional

 sentInvite.Type = (int)Outlook.OlMeetingRecipientType.olOptional;

 /// set the meeting Status.

newAppointment.MeetingStatus = Outlook.OlMeetingStatus.olMeeting; 

///resolve the names  against your Contacts.

sentTo.ResolveAll(); 

///Send the meeting request.

 ((Outlook._AppointmentItem)newAppointment).Send(); 

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Meeting invite ll be sent to the recipients.

That's it, Done !!!!  

for more details refer,

http://msdn.microsoft.com/en-us/library/ms268752.aspx