private void ShowResults()
{
// This scenario illustrates time zone support in Windows.Globalization.Calendar class
// Displayed time zones in addition to the local time zone.
string[] timeZones = new[] { "UTC", "America/New_York", "Asia/Kolkata" };
// Store results here.
StringBuilder results = new StringBuilder();
// Create default Calendar object
Calendar calendar = new Calendar();
string localTimeZone = calendar.GetTimeZone();
// Show current time in local time zone
results.AppendLine("Current date and time:");
results.AppendLine(ReportCalendarData(calendar));
// Show current time in additional time zones
foreach (string timeZone in timeZones)
{
calendar.ChangeTimeZone(timeZone);
results.AppendLine(ReportCalendarData(calendar));
}
results.AppendLine();
// Change back to local time zone
calendar.ChangeTimeZone(localTimeZone);
// Show a time on 14th day of second month of next year.
// Note the effect of daylight saving time on the results.
results.AppendLine("Same time on 14th day of second month of next year:");
calendar.AddYears(1); calendar.Month = 2; calendar.Day = 14;
results.AppendLine(ReportCalendarData(calendar));
foreach (string timeZone in timeZones)
{
calendar.ChangeTimeZone(timeZone);
results.AppendLine(ReportCalendarData(calendar));
}
results.AppendLine();
// Change back to local time zone
calendar.ChangeTimeZone(localTimeZone);
// Show a time on 14th day of tenth month of next year.
// Note the effect of daylight saving time on the results.
results.AppendLine("Same time on 14th day of tenth month of next year:");
calendar.AddMonths(8);
results.AppendLine(ReportCalendarData(calendar));
foreach (string timeZone in timeZones)
{
calendar.ChangeTimeZone(timeZone);
results.AppendLine(ReportCalendarData(calendar));
}
results.AppendLine();
// Display the results
OutputTextBlock.Text = results.ToString();
}
/// <summary>
/// Gets the UTC <see cref="DateTime"/> of the calendar.
/// </summary>
internal static DateTime GetUtcDateTime(this Windows.Globalization.Calendar calendar)
{
DateTime dateTime;
if (calendar.Year == calendar.LastYearInThisEra)
{
calendar.AddYears(-1);
dateTime = calendar.GetDateTime().UtcDateTime;
if (dateTime > DateTime.MaxValue.AddYears(-1))
{
dateTime = DateTime.MaxValue;
}
else
{
dateTime = dateTime.AddYears(1);
}
calendar.AddYears(1);
}
else if (calendar.Year == calendar.FirstYearInThisEra)
{
calendar.AddYears(1);
dateTime = calendar.GetDateTime().UtcDateTime;
if (dateTime < DateTime.MinValue.AddYears(1))
{
dateTime = DateTime.MinValue;
}
else
{
dateTime = dateTime.AddYears(-1);
}
calendar.AddYears(-1);
}
else
{
dateTime = calendar.GetDateTime().UtcDateTime;
}
return(dateTime);
}
/// <summary>
/// This is the click handler for the 'Display' button.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Display_Click(object sender, RoutedEventArgs e)
{
// This scenario illustrates TimeZone support in Windows.Globalization.Calendar class
// Displayed TimeZones (other than local timezone)
String[] timeZones = new String[] { "UTC", "America/New_York", "Asia/Kolkata" };
// Store results here.
StringBuilder results = new StringBuilder();
// Create default Calendar object
Calendar calendar = new Calendar();
String localTimeZone = calendar.GetTimeZone();
// Show current time in timezones desired to be displayed including local timezone
results.AppendLine("Current date and time -");
results.AppendLine(GetFormattedCalendarDateTime(calendar));
foreach (String timeZone in timeZones)
{
calendar.ChangeTimeZone(timeZone);
results.AppendLine(GetFormattedCalendarDateTime(calendar));
}
results.AppendLine();
calendar.ChangeTimeZone(localTimeZone);
// Show a time on 14th day of second month of next year in local, GMT, New York and Indian Time Zones
// This will show if there were day light savings in time
results.AppendLine("Same time on 14th day of second month of next year -");
calendar.AddYears(1); calendar.Month = 2; calendar.Day = 14;
results.AppendLine(GetFormattedCalendarDateTime(calendar));
foreach (String timeZone in timeZones)
{
calendar.ChangeTimeZone(timeZone);
results.AppendLine(GetFormattedCalendarDateTime(calendar));
}
results.AppendLine();
calendar.ChangeTimeZone(localTimeZone);
// Show a time on 14th day of 10th month of next year in local, GMT, New York and Indian Time Zones
// This will show if there were day light savings in time
results.AppendLine("Same time on 14th day of tenth month of next year -");
calendar.AddMonths(8);
results.AppendLine(GetFormattedCalendarDateTime(calendar));
foreach (String timeZone in timeZones)
{
calendar.ChangeTimeZone(timeZone);
results.AppendLine(GetFormattedCalendarDateTime(calendar));
}
results.AppendLine();
// Display the results
rootPage.NotifyUser(results.ToString(), NotifyType.StatusMessage);
}
/// <summary>
/// This is the click handler for the 'Default' button.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Display_Click(object sender, RoutedEventArgs e)
{
// This scenario uses the Windows.Globalization.Calendar class to enumerate through a calendar and
// perform calendar math
StringBuilder results = new StringBuilder();
results.AppendLine("The number of years in each era of the Japanese era calendar is not regular. It is determined by the length of the given imperial era:\n");
// Create Japanese calendar.
Calendar calendar = new Calendar(new[] { "en-US" }, CalendarIdentifiers.Japanese, ClockIdentifiers.TwentyFourHour);
// Enumerate all supported years in all supported Japanese eras.
for (calendar.Era = calendar.FirstEra; true; calendar.AddYears(1))
{
// Process current era.
results.AppendLine("Era " + calendar.EraAsString() + " contains " + calendar.NumberOfYearsInThisEra + " year(s)");
// Enumerate all years in this era.
for (calendar.Year = calendar.FirstYearInThisEra; true; calendar.AddYears(1))
{
// Begin sample processing of current year.
// Move to first day of year. Change of month can affect day so order of assignments is important.
calendar.Month = calendar.FirstMonthInThisYear;
calendar.Day = calendar.FirstDayInThisMonth;
// Set time to midnight (local).
calendar.Period = calendar.FirstPeriodInThisDay; // All days have 1 or 2 periods depending on clock type
calendar.Hour = calendar.FirstHourInThisPeriod; // Hours start from 12 or 0 depending on clock type
calendar.Minute = 0;
calendar.Second = 0;
calendar.Nanosecond = 0;
if (calendar.Year % 1000 == 0)
{
results.AppendLine();
}
else if (calendar.Year % 10 == 0)
{
results.Append(".");
}
// End sample processing of current year.
// Break after processing last year.
if (calendar.Year == calendar.LastYearInThisEra)
{
break;
}
}
results.AppendLine();
// Break after processing last era.
if (calendar.Era == calendar.LastEra)
{
break;
}
}
// This section shows enumeration through the hours in a day to demonstrate that the number of time units in a given period (hours in a day, minutes in an hour, etc.)
// should not be regarded as fixed. With Daylight Saving Time and other local calendar adjustments, a given day may have not have 24 hours, and
// a given hour may not have 60 minutes, etc.
results.AppendLine("\nThe number of hours in a day is not invariable. The US calendar transitions from DST to standard time on 4 November 2012:\n");
// Create a DateTimeFormatter to display dates
DateTimeFormatter displayDate = new Windows.Globalization.DateTimeFormatting.DateTimeFormatter("longdate");
// Create a gregorian calendar for the US with 12-hour clock format
Calendar currentCal = new Windows.Globalization.Calendar(new string[] { "en-US" }, CalendarIdentifiers.Gregorian, ClockIdentifiers.TwentyFourHour, "america/los_angeles");
// Set the calendar to a the date of the Daylight Saving Time-to-Standard Time transition for the US in 2012.
// DST ends in the US at 02:00 on 4 November 2012
DateTime dstDate = new DateTime(2012, 11, 4);
currentCal.SetDateTime(dstDate);
// Set the current calendar to one day before DST change. Create a second calendar for comparision and set it to one day after DST change.
Calendar endDate = currentCal.Clone();
currentCal.AddDays(-1);
endDate.AddDays(1);
// Enumerate the day before, the day of, and the day after the 2012 DST-to-Standard time transition
while (currentCal.Day <= endDate.Day)
{
// Process current day.
DateTimeOffset date = currentCal.GetDateTime();
results.AppendFormat("{0} contains {1} hour(s)\n", displayDate.Format(date), currentCal.NumberOfHoursInThisPeriod);
// Enumerate all hours in this day.
// Create a calendar to represent the following day.
Calendar nextDay = currentCal.Clone();
nextDay.AddDays(1);
for (currentCal.Hour = currentCal.FirstHourInThisPeriod; true; currentCal.AddHours(1))
{
// Display the hour for each hour in the day.
results.AppendFormat("{0} ", currentCal.HourAsPaddedString(2));
// Break upon reaching the next period (i.e. the first period in the following day).
if (currentCal.Day == nextDay.Day && currentCal.Period == nextDay.Period)
{
break;
}
}
results.AppendLine();
}
// Display results
OutputTextBlock.Text = results.ToString();
}
