遍历日历的所有 AppointmentItems 时出现问题

Question

我需要从日历中获取所有 AppointmentItems，但是在一些项目之后我得到了一个异常，错误是说打开的项目的最大值是有限的。我不通过 foreach 循环循环它们，因此引用应该没有问题。我立即 "convert" 这些项目进入我的项目类型，以便我可以释放对象。在释放对象后，我还将对象的引用设置为 null 并且我尝试调用垃圾收集器，但错误仍然发生。

Items items = application.Session.GetFolderFromID(MainCalendar).Items;
for(Int32 i = 1; i < items.Count; i++)
{
    AppointmentItem appointmentItem = items[i] as AppointmentItem;
    TempOutlookAppointment tempApp = new TempOutlookAppointment();
    tempApp.FillFromAppointmentItem(appointmentItem);
    appointmentItem.Close(OlInspectorClose.olDiscard);
    Marshal.ReleaseComObject(appointmentItem);
    appointmentItem = null;
    GC.Collect();
    // Adding tempApp to a List
}



// FillFromAppointmentItem
public void FillFromAppointmentItem(Microsoft.Office.Interop.Outlook.AppointmentItem appointmentItem)
{
        AllDayEvent = appointmentItem.AllDayEvent;
        Body = appointmentItem.Body;
        End = appointmentItem.End;
        Location = appointmentItem.Location;
        OutlookLinkID = appointmentItem.UserProperties.Find("LINKID") != null
            ? Guid.Parse(appointmentItem.UserProperties.Find("LINKID").Value.ToString())
            : Guid.Empty;
        Start = appointmentItem.Start;
        if (appointmentItem.IsRecurring)
        {
            Microsoft.Office.Interop.Outlook.RecurrencePattern pattern = appointmentItem.GetRecurrencePattern();
            TerminSerie serie = new TerminSerie()
            {
                MaxOccurences = pattern.Occurrences,
                PatternDayOfMonth = pattern.DayOfMonth,
                PatternFrequency = pattern.RecurrenceType == Microsoft.Office.Interop.Outlook.OlRecurrenceType.olRecursDaily ? PatternFrequency.Daily : pattern.RecurrenceType == Microsoft.Office.Interop.Outlook.OlRecurrenceType.olRecursMonthly ? PatternFrequency.Monthly : pattern.RecurrenceType == Microsoft.Office.Interop.Outlook.OlRecurrenceType.olRecursWeekly ? PatternFrequency.Weekly : PatternFrequency.Yearly,
                PatternInterval = pattern.RecurrenceType == Microsoft.Office.Interop.Outlook.OlRecurrenceType.olRecursMonthly ? pattern.Interval / 12 : pattern.Interval,
                PatternMonthOfYear = pattern.MonthOfYear,
                RangeEndDate = pattern.PatternEndDate,
                RangeLimit = pattern.NoEndDate ? RangeLimit.NoLimit : pattern.Occurrences > 0 ? RangeLimit.ByOccurences : RangeLimit.ByDate,
                RangeStartDate = pattern.PatternStartDate
            };
            Int32 i = pattern.DayOfWeekMask.GetHashCode();
            List<System.DayOfWeek> days = new List<System.DayOfWeek>();
            if (i >= 64)
            {
                days.Add(System.DayOfWeek.Saturday);
                i -= 64;
            }
            if (i >= 32)
            {
                days.Add(System.DayOfWeek.Friday);
                i -= 32;
            }
            if (i >= 16)
            {
                days.Add(System.DayOfWeek.Thursday);
                i -= 16;
            }
            if (i >= 8)
            {
                days.Add(System.DayOfWeek.Wednesday);
                i -= 8;
            }
            if (i >= 4)
            {
                days.Add(System.DayOfWeek.Tuesday);
                i -= 4;
            }
            if (i >= 2)
            {
                days.Add(System.DayOfWeek.Monday);
                i -= 2;
            }
            if (i == 1)
            {
                days.Add(System.DayOfWeek.Sunday);
            }
            serie.PatternDaysOfWeek = days;
        }
        Subject = appointmentItem.Subject;
    }

我希望你能帮助我解决我的问题。

Answer 1

5 天我只是不明白为什么这不起作用，现在我随机得到了一个解决方案。

对于那些有同样问题的人：我只需要更改这一行：

Marshal.ReleaseComObject(appointmentItem);

给这个：

while(Marshal.ReleaseComObject(appointmentItem) > 0)
    Marshal.ReleaseComObject(appointmentItem);

我现在不知道为什么，但现在可以了。

Answer 2

你还有一个隐式变量。更改以下内容

AppointmentItem appointmentItem = items[i] as AppointmentItem;
...
Marshal.ReleaseComObject(appointmentItem);

至

object item = items[i];
AppointmentItem appointmentItem = item as AppointmentItem;
...
Marshal.ReleaseComObject(appointmentItem);
Marshal.ReleaseComObject(item);

遍历日历的所有 AppointmentItems 时出现问题

Problem while looping through all AppointmentItems of a Calendar

c#

outlook

calendar

comobject

appointment