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(); }