.NET: Get all Outlook calendar items

Question

How can I get all items from a specific calendar (for a specific date). Lets say for instance that I have a calendar with a recurring item every Monday evening. When I requ

Answer 1

I found this article very useful: https://docs.microsoft.com/en-us/office/client-developer/outlook/pia/how-to-search-and-obtain-appointments-in-a-time-range

It demonstrates how to get calendar entries in a specified time range. It worked for me. Here is the source code from the article for your convenience :)

using Outlook = Microsoft.Office.Interop.Outlook;

private void DemoAppointmentsInRange()
{
    Outlook.Folder calFolder = Application.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderCalendar)
        as Outlook.Folder;
    DateTime start = DateTime.Now;
    DateTime end = start.AddDays(5);
    Outlook.Items rangeAppts = GetAppointmentsInRange(calFolder, start, end);
    if (rangeAppts != null)
    {
        foreach (Outlook.AppointmentItem appt in rangeAppts)
        {
             Debug.WriteLine("Subject: " + appt.Subject 
                 + " Start: " + appt.Start.ToString("g"));
        }
    }
}

/// 

/// Get recurring appointments in date range.
/// 
/// 
/// 
/// 
/// Outlook.Items
private Outlook.Items GetAppointmentsInRange(
    Outlook.Folder folder, DateTime startTime, DateTime endTime)
{
    string filter = "[Start] >= '"
        + startTime.ToString("g")
        + "' AND [End] <= '"
        + endTime.ToString("g") + "'";
    Debug.WriteLine(filter);
    try
    {
        Outlook.Items calItems = folder.Items;
        calItems.IncludeRecurrences = true;
        calItems.Sort("[Start]", Type.Missing);
        Outlook.Items restrictItems = calItems.Restrict(filter);
        if (restrictItems.Count > 0)
        {
            return restrictItems;
        }
        else
        {
            return null;
        }
    }
    catch { return null; }
 }