public void ChangeEndRecurrence()
{
OwaStoreObjectId owaStoreObjectId = (OwaStoreObjectId)base.GetParameter("Id");
string changeKey = (string)base.GetParameter("CK");
ExDateTime endRange = (ExDateTime)base.GetParameter("ET");
CalendarItem calendarItem = null;
try
{
calendarItem = Utilities.GetItem <CalendarItem>(base.UserContext, owaStoreObjectId, changeKey, new PropertyDefinition[]
{
CalendarItemBaseSchema.IsMeeting,
CalendarItemBaseSchema.MeetingRequestWasSent,
StoreObjectSchema.EffectiveRights
});
if (!ItemUtility.UserCanEditItem(calendarItem) || Utilities.IsItemInExternalSharedInFolder(base.UserContext, calendarItem))
{
this.Writer.Write("<div id=divOp _sOp=\"np\"></div>");
}
else
{
int num = MeetingUtilities.CancelRecurrence(calendarItem, endRange);
if (num != -2147483648)
{
if (calendarItem.IsMeeting && calendarItem.MeetingRequestWasSent && calendarItem.IsOrganizer())
{
base.ResponseContentType = OwaEventContentType.Html;
this.Writer.Write("<div id=divOp _sOp=er></div>");
}
else if (0 < num)
{
EndDateRecurrenceRange range = new EndDateRecurrenceRange(calendarItem.Recurrence.Range.StartDate, endRange.IncrementDays(-1));
calendarItem.Recurrence = new Recurrence(calendarItem.Recurrence.Pattern, range);
Utilities.SaveItem(calendarItem);
this.RenderPayload(new OwaStoreObjectId[]
{
(OwaStoreObjectId)base.GetParameter("fId")
});
}
else
{
calendarItem.DeleteMeeting(DeleteItemFlags.MoveToDeletedItems);
this.RenderPayload(new OwaStoreObjectId[]
{
(OwaStoreObjectId)base.GetParameter("fId")
});
}
}
}
}
finally
{
if (calendarItem != null)
{
calendarItem.Dispose();
calendarItem = null;
}
}
}