protected override void CreateChildControls()
        {
            base.CreateChildControls();

            try
            {
                SPWeb web = SPContext.Current.Web;

                spCalendarHolidayView = new SPCalendarView();
                spCalendarHolidayView.EnableViewState    = true;
                spCalendarHolidayView.EnableV4Rendering  = web.UIVersion >= 4;
                spCalendarHolidayView.NewItemFormUrl     = web.ServerRelativeUrl.TrimEnd('/') + Constants.Pages.HOLIDAY_FORM_PAGE_URL + "?Mode=3";
                spCalendarHolidayView.EditItemFormUrl    = web.ServerRelativeUrl.TrimEnd('/') + Constants.Pages.HOLIDAY_FORM_PAGE_URL + "?Mode=2";
                spCalendarHolidayView.DisplayItemFormUrl = web.ServerRelativeUrl.TrimEnd('/') + Constants.Pages.HOLIDAY_FORM_PAGE_URL + "?Mode=1";

                string viewType     = this.CalendarPeriod;
                string selectedDate = SPUtility.GetSelectedDate(Request, web);

                Tuple <DateTime, DateTime> calendarPeriod = Utils.GetCalendarViewPeriod(SPContext.Current.Web.GetDateOptions(Request), viewType);
                spCalendarHolidayView.ViewType     = viewType;
                spCalendarHolidayView.SelectedDate = selectedDate;

                // Bind the datasource to the SPCalendarView
                var   ds           = new SPCalendarItemCollection();
                short calendarType = web.RegionalSettings.CalendarType;
                var   holidays     = new RosterDataService().ListHolidayEvents().OrderBy(item => item.HolidayDate).ToList();
                ds.AddRange(holidays.Select(item => new SPCalendarItem()
                {
                    DisplayFormUrl = web.ServerRelativeUrl.TrimEnd('/') + Constants.Pages.HOLIDAY_FORM_PAGE_URL + "?Mode=1",
                    CalendarType   = calendarType,
                    ItemID         = item.Id.ToString(),
                    StartDate      = item.HolidayDate.Date,
                    EndDate        = item.HolidayDate.Date.AddSeconds(86400),
                    hasEndDate     = true,
                    Title          = item.Holiday.Name,
                    Location       = item.Holiday.HolidayType.Name,
                    IsAllDayEvent  = true,
                    IsRecurrence   = false
                }).ToList());

                // data bind
                spCalendarHolidayView.DataSource = ds;
                spCalendarHolidayView.DataBind();

                // add Calendar to page
                this.Controls.Add(spCalendarHolidayView);
            }
            catch (Exception ex)
            {
                Controls.Add(new Label()
                {
                    Text = ex.Message, ForeColor = System.Drawing.Color.Red
                });
                Controls.Add(new Label()
                {
                    Text = " StackTrace: " + ex.StackTrace, ForeColor = System.Drawing.Color.Red
                });
            }
        }
        public SPCalendarItemCollection SelectDataForCalendar(short calendarType, Tuple <DateTime, DateTime> calendarPeriod, string calendarScope, out object rostersForColoring)
        {
            var query        = new QueryParams();
            var listFields   = this.m_view.ListMetadata.ListMetadataFields;
            var startDateFld = listFields.FirstOrDefault(item => item.InternalName == FieldNames.START_DATE);
            var endDateFld   = listFields.FirstOrDefault(item => item.InternalName == FieldNames.END_DATE);

            // set filter according period displayed by Calendar
            query.WhereCriteria.Add(new Tuple <ListMetadataField, CompareType, ConcateOperator, object, string>(startDateFld, CompareType.LessOrEqual, ConcateOperator.And, calendarPeriod.Item2, null));
            query.WhereCriteria.Add(new Tuple <ListMetadataField, CompareType, ConcateOperator, object, string>(endDateFld, CompareType.MoreOrEqual, ConcateOperator.And, calendarPeriod.Item1, null));

            // add filter
            if (this.m_GridFilterExpression != null && this.m_GridFilterExpression.WhereCriteria.Any())
            {
                query.WhereCriteria.AddRange(this.m_GridFilterExpression.WhereCriteria);
            }

            // extract Roster data
            RosterDataService _dataSrv = new RosterDataService();
            //List<RosterEvent> rosters = (this.m_view.ListMetadataId == Roster.Common.TableIDs.TIMESHEET_ROSTERS && this.displayPrepopulatedRosters) ?
            //    _dataSrv.ViewTimesheetEvents(this.m_view.Id, query, calendarPeriod) : _dataSrv.ViewRosterEvents(this.m_view.Id, query);
            List <RosterEvent> rosters = _dataSrv.ViewRosterEvents(this.m_view.Id, query);

            // expant recurrent events
            var tZone = SPContext.Current.Web.RegionalSettings.TimeZone;
            List <ExpandedRosterEvent> expandedEvents = RecurrenceItemExpander.Expand(rosters, null, calendarPeriod.Item1, calendarPeriod.Item2,
                                                                                      FieldNames.START_DATE, FieldNames.END_DATE, tZone).ToList();

            // send Object to output for coloring
            if (!this.m_view.GetDerializedDynamicColourSettings().IsEmpty)
            {
                if (this.dynColoring_OriginalRosterId != Guid.Empty && !rosters.Any(r => r.Id == this.dynColoring_OriginalRosterId))
                {
                    List <RosterEvent> rosters_dynColor = rosters;
                    RosterEvent        origRoster       = _dataSrv.GetRosterEvent(this.dynColoring_OriginalRosterId); // !! don't return all properties

                    // get events around Orig.Roster
                    var queryDyn = new QueryParams();
                    queryDyn.WhereCriteria.Add(new Tuple <ListMetadataField, CompareType, ConcateOperator, object, string>(startDateFld, CompareType.LessOrEqual, ConcateOperator.And, origRoster.GetEndDate(), null));
                    queryDyn.WhereCriteria.Add(new Tuple <ListMetadataField, CompareType, ConcateOperator, object, string>(endDateFld, CompareType.MoreOrEqual, ConcateOperator.And, origRoster.GetStartDate(), null));
                    rosters_dynColor.AddRange(_dataSrv.ViewRosterEvents(this.m_view.Id, queryDyn));

                    rosters_dynColor   = rosters_dynColor.GroupBy(r => r.Id).Select(g => g.First()).ToList();              // remove duplicates
                    rostersForColoring = RecurrenceItemExpander.Expand(rosters_dynColor, null, calendarPeriod.Item1, calendarPeriod.Item2,
                                                                       FieldNames.START_DATE, FieldNames.END_DATE, tZone); // for dynamic coloring

                    // add original Roster (only for Dynamic colour-coding)
                    expandedEvents.Add(new ExpandedRosterEvent(rosters_dynColor.First(r => r.Id == this.dynColoring_OriginalRosterId), true, tZone));
                }
                else
                {
                    rostersForColoring = expandedEvents; // for dynamic coloring
                }
            }
            else
            {
                rostersForColoring = rosters;        // for static coloring
            }

            // get default DispForm url and default EventTypeId for rosters
            string defaultDispFormUrl = string.Format("{0}/{1}&ListId={2}", SPContext.Current.Web.ServerRelativeUrl.TrimEnd('/'),
                                                      this.m_view.ListMetadata.DispItemUrl.TrimStart('/'), SPEncode.UrlEncode(this.m_view.ListMetadataId.ToString("B").ToUpper()));
            var    matchEventType         = Regex.Match(defaultDispFormUrl, @"EventType=(?<eType>\d+)");
            int    defaultEventType       = matchEventType.Success ? matchEventType.Groups["eType"].Value.ToInt() : -1;
            string eventTitleFieldName    = this.m_view.GetEventTitleFieldName(calendarScope);
            string eventLocationFieldName = this.m_view.GetEventLocationFieldName(calendarScope);

            // init some variables for Working Rosters which are displayed on TIMESHEET view
            string workingRoster_DispFormUrl           = string.Empty;
            string workingRosterEventTitleFieldName    = string.Empty;
            string workingRosterEventLocationFieldName = string.Empty;

            if (this.m_view.ListMetadataId == Roster.Common.TableIDs.TIMESHEET_ROSTERS)
            {
                var workingRosterList = new RosterConfigService().GetList(Roster.Common.TableIDs.WORKING_ROSTERS);
                workingRoster_DispFormUrl = string.Format("{0}/{1}&ListId={2}", SPContext.Current.Web.ServerRelativeUrl.TrimEnd('/'),
                                                          workingRosterList.DispItemUrl.TrimStart('/'), SPEncode.UrlEncode(workingRosterList.Id.ToString("B").ToUpper()));

                var workingRosterView = workingRosterList.ViewMetadatas.FirstOrDefault(x => x.Name == ViewNames.WORKING_ROSTERS_FOR_TIMESHEETS);
                workingRosterEventTitleFieldName    = (workingRosterView != null) ? workingRosterView.GetEventTitleFieldName(calendarScope) : FieldNames.START_DATE;
                workingRosterEventLocationFieldName = (workingRosterView != null) ? workingRosterView.GetEventLocationFieldName(calendarScope) : FieldNames.END_DATE;
            }

            // init Calendar Items
            var items = new SPCalendarItemCollection();

            items.AddRange(expandedEvents.Select(x => new SPCalendarItem()
            {
                DisplayFormUrl = (defaultEventType == x.EventTypeId) ? defaultDispFormUrl : workingRoster_DispFormUrl,
                CalendarType   = calendarType,
                ItemID         = x.InstanceID,
                StartDate      = x.StartDate,
                EndDate        = x.EndDate,
                hasEndDate     = true,
                Title          = ((IDictionary <string, object>)x.OriginalItem.RosterEventProperties)[(defaultEventType == x.EventTypeId) ? eventTitleFieldName : workingRosterEventTitleFieldName].ToString(),
                Location       = ((IDictionary <string, object>)x.OriginalItem.RosterEventProperties)[(defaultEventType == x.EventTypeId) ? eventLocationFieldName : workingRosterEventLocationFieldName].ToString(),
                IsAllDayEvent  = x.OriginalItem.GetIsAllDayEvent(),
                IsRecurrence   = x.OriginalItem.GetIsRecurrence()
            }).ToList());

            return(items);
        }