PrimaryInterval Property

using System.Collections.Generic;
using Infragistics.Win;
using Infragistics.Win.UltraWinSchedule;

public void InitDateTimeIntervals( UltraTimelineView control )
{
    //  Remove all additional intervals
    control.AdditionalIntervals.Clear();

    //  Get the current culture's date/time format info
    System.Globalization.DateTimeFormatInfo formatInfo = System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat;

    //  Create a monthly interval; set its header format to the YearMonthPattern
    //  for the current culture so that the year is displayed along with the month name.
    DateInterval monthInterval = new DateInterval( 1, DateIntervalUnits.Months );
    monthInterval.HeaderTextFormat = formatInfo.YearMonthPattern;

    //  Create a bi-weekly interval; use the 'RangeStart' HeaderTextFormatStyle,
    //  and customize the format so it shows as a pay period. Also, set its
    //  SynchronizingDate property to the first Monday of the year so that the
    //  cycles begin on a Monday.
    DateInterval biWeeklyInterval = new DateInterval( 2, DateIntervalUnits.Weeks );
    biWeeklyInterval.HeaderTextFormatStyle = TimelineViewHeaderTextFormatStyle.RangeStart;
    biWeeklyInterval.HeaderTextFormat = string.Format("\\P\\a\\y \\P\\e\\r\\i\\o\\d: {0}", formatInfo.MonthDayPattern);
    biWeeklyInterval.SynchronizingDate = new DateTime(2009, 1, 5 );

    //  Create a daily interval; since we already have the year showing,
    //  we can set the format to only display the name of the day of the week.
    DateInterval dayInterval = new DateInterval( 1, DateIntervalUnits.Days );
    dayInterval.HeaderTextFormat = "dddd";

    //  Create 1-hour TimeIntervals for some of the different U.S. time zones
    TimeZoneInfo tzHawaii = TimeZoneInfo.FromStandardName( "Hawaiian Standard Time", false );
    if ( tzHawaii != null )
    {
        TimeInterval hawaii = new TimeInterval( 1, TimeIntervalUnits.Hours );
        hawaii.TimeZone = tzHawaii;
        hawaii.LabelText = "Hawaii";
        hawaii.LabelToolTipText = tzHawaii.DisplayName;

        //  Use the colors of the Hawaii state flag to style the appearance
        hawaii.HeaderAppearance.BackGradientStyle = GradientStyle.None;
        hawaii.HeaderAppearance.ForeColor = Color.Red;
        hawaii.HeaderAppearance.BackColor = Color.White;
        hawaii.HeaderAppearance.BorderColor = Color.Black;
        hawaii.LabelAppearance.BackColor = Color.White;
        hawaii.DateNavigationButtonAppearance.ForeColor = Color.Red;
        hawaii.DateNavigationButtonAppearance.BorderColor = Color.Navy;

        //   Set DateNavigationButtonVisibility to 'ShowOnFirstAndLastHeader', and set
        //   DateNavigationButtonAction to 'None'
        hawaii.DateNavigationButtonVisibility = TimelineViewDateNavigationButtonVisibility.ShowOnFirstAndLastHeader;
        hawaii.DateNavigationButtonAction = TimelineViewDateNavigationButtonAction.None;

        //  Add it to the AdditionalIntervals collection
        control.AdditionalIntervals.Add( hawaii );
    }

    TimeZoneInfo tzAlaska = TimeZoneInfo.FromStandardName( "Alaskan Standard Time", false );
    if ( tzAlaska != null )
    {
        TimeInterval alaska = new TimeInterval( 1, TimeIntervalUnits.Hours );
        alaska.TimeZone = tzAlaska;
        alaska.LabelText = "Alaska";
        alaska.LabelToolTipText = tzAlaska.DisplayName;

        //  Use the colors of the Alaska state flag to style the appearance
        alaska.HeaderAppearance.BackGradientStyle = GradientStyle.None;
        alaska.HeaderAppearance.ForeColor = Color.Goldenrod;
        alaska.HeaderAppearance.BackColor = Color.CornflowerBlue;
        alaska.HeaderAppearance.BorderColor = Color.Black;
        alaska.LabelAppearance.BackColor = Color.CornflowerBlue;
        alaska.DateNavigationButtonAppearance.ForeColor = Color.Goldenrod;
        alaska.DateNavigationButtonAppearance.BorderColor = Color.Black;

        //   Set DateNavigationButtonVisibility to 'ShowOnFirstAndLastHeader', and set
        //   DateNavigationButtonAction to 'None'.
        alaska.DateNavigationButtonVisibility = TimelineViewDateNavigationButtonVisibility.ShowOnFirstAndLastHeader;
        alaska.DateNavigationButtonAction = TimelineViewDateNavigationButtonAction.None;

        //  Add it to the AdditionalIntervals collection
        control.AdditionalIntervals.Add( alaska );
    }

    //  Handle the DateNavigationButtonClicked event so we can customize
    //  the navigation for the Alaska and Hawaii intervals.
    control.DateNavigationButtonClicked += new DateNavigationButtonClickedHandler(OnDateNavigationButtonClicked);

    //  Create a 30-minute TimeInterval that will be used as the PrimaryInterval
    TimeInterval primaryInterval = new TimeInterval(30, TimeIntervalUnits.Minutes);
    TimeZoneInfo tzCurrent = TimeZoneInfo.CurrentTimeZone;
    if ( tzCurrent != null )
    {
        string standardName = tzCurrent.StandardName;
        string acronym = standardName;

        //  Build an acronym from the standard name and assign that
        //  string value to the LabelText property
        string[] split = standardName.Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
        if ( split.Length > 1 )
        {
            acronym = string.Empty;
            foreach( string s in split )
            {
                acronym += s[0];
            }
        }
        
        primaryInterval.LabelText = acronym;
        primaryInterval.LabelToolTipText = standardName;

        //  Set some appearance properties
        primaryInterval.HeaderAppearance.BackGradientStyle = GradientStyle.None;
        primaryInterval.HeaderAppearance.ForeColor = SystemColors.ControlDark;
        primaryInterval.HeaderAppearance.BackColor = SystemColors.Control;
        primaryInterval.HeaderAppearance.BorderColor = SystemColors.ControlDarkDark;
        primaryInterval.LabelAppearance.BackColor = SystemColors.Control;
    }

    //  Assign the TimeInterval to the PrimaryInterval property
    control.PrimaryInterval = primaryInterval;

    //  Add each interval we created to the AdditionalIntervals collection
    control.AdditionalIntervals.Add( monthInterval );
    control.AdditionalIntervals.Add( biWeeklyInterval );
    control.AdditionalIntervals.Add( dayInterval );
}