/// <summary> /// Gets the time from a /// <see cref="T:System.DateTime"/> /// object in short Metro format. /// </summary> /// <remarks> /// Metro design guidelines normalize strings to lowercase. /// </remarks> /// <param name="dt">Time information.</param> /// <returns>"10:20p" for 10:20 p.m. when en-US.</returns> public static string GetSuperShortTime(DateTime dt) { if (formatInfo_GetSuperShortTime == null) { lock (lock_GetSuperShortTime) { StringBuilder result = new StringBuilder(string.Empty); string seconds; formatInfo_GetSuperShortTime = (DateTimeFormatInfo)CultureInfo.CurrentCulture.DateTimeFormat.Clone(); result.Append(formatInfo_GetSuperShortTime.LongTimePattern); seconds = rxSeconds.Match(result.ToString()).Value; result.Replace(" ", string.Empty); result.Replace(seconds, string.Empty); if (!(DateTimeFormatHelper.IsCurrentCultureJapanese() || DateTimeFormatHelper.IsCurrentCultureKorean() || DateTimeFormatHelper.IsCurrentCultureHungarian())) { result.Replace(DoubleMeridiemDesignator, SingleMeridiemDesignator); } formatInfo_GetSuperShortTime.ShortTimePattern = result.ToString(); } } return(dt.ToString("t", formatInfo_GetSuperShortTime).ToLowerInvariant()); }
/// <summary> /// Gets the abbreviated day from a /// <see cref="T:System.DateTime"/> /// object. /// </summary> /// <param name="dt">Date information.</param> /// <returns>e.g. "Mon" for Monday when en-US.</returns> public static string GetAbbreviatedDay(DateTime dt) { if (DateTimeFormatHelper.IsCurrentCultureJapanese() || DateTimeFormatHelper.IsCurrentCultureKorean()) { return("(" + dt.ToString("ddd", CultureInfo.CurrentCulture) + ")"); } else { return(dt.ToString("ddd", CultureInfo.CurrentCulture)); } }
/// <summary> /// Converts a /// <see cref="T:System.DateTime"/> /// object into a string the represents the elapsed time /// relatively to the present. /// </summary> /// <param name="value">The given date and time.</param> /// <param name="targetType"> /// The type corresponding to the binding property, which must be of /// <see cref="T:System.String"/>. /// </param> /// <param name="parameter">(Not used).</param> /// <param name="culture"> /// The culture to use in the converter. /// When not specified, the converter uses the current culture /// as specified by the system locale. /// </param> /// <returns>The given date and time as a string.</returns> public object Convert(object value, Type targetType, object parameter, string culture) { // Target value must be a System.DateTime object. if (!(value is DateTime)) { throw new ArgumentException(TimeResources.GetString("InvalidDateTimeArgument")); } string result; DateTime given = ((DateTime)value).ToLocalTime(); DateTime current = DateTime.Now; TimeSpan difference = current - given; SetLocalizationCulture(PreferredCulture); if (DateTimeFormatHelper.IsFutureDateTime(current, given)) { // Future dates and times are not supported, but to prevent crashing an app // if the time they receive from a server is slightly ahead of the phone's clock // we'll just default to the minimum, which is "2 seconds ago". result = GetPluralTimeUnits(2, PluralSecondStrings); } if (difference.TotalSeconds > Year) { // "over a year ago" result = TimeResources.GetString("OverAYearAgo"); } else if (difference.TotalSeconds > (1.5 * Month)) { // "x months ago" int nMonths = (int)((difference.TotalSeconds + Month / 2) / Month); result = GetPluralMonth(nMonths); } else if (difference.TotalSeconds >= (3.5 * Week)) { // "about a month ago" result = TimeResources.GetString("AboutAMonthAgo"); } else if (difference.TotalSeconds >= Week) { int nWeeks = (int)(difference.TotalSeconds / Week); if (nWeeks > 1) { // "x weeks ago" result = string.Format(PreferredCulture, TimeResources.GetString("XWeeksAgo_2To4"), nWeeks.ToString(PreferredCulture)); } else { // "about a week ago" result = TimeResources.GetString("AboutAWeekAgo"); } } else if (difference.TotalSeconds >= (5 * Day)) { // "last <dayofweek>" result = string.Format(PreferredCulture, TimeResources.GetString("LastDayOfWeek"), GetDayOfWeek(given.DayOfWeek)); } else if (difference.TotalSeconds >= Day) { // "on <dayofweek>" result = GetOnDayOfWeek(given.DayOfWeek); } else if (difference.TotalSeconds >= (2 * Hour)) { // "x hours ago" int nHours = (int)(difference.TotalSeconds / Hour); result = GetPluralTimeUnits(nHours, PluralHourStrings); } else if (difference.TotalSeconds >= Hour) { // "about an hour ago" result = TimeResources.GetString("AboutAnHourAgo"); } else if (difference.TotalSeconds >= (2 * Minute)) { // "x minutes ago" int nMinutes = (int)(difference.TotalSeconds / Minute); result = GetPluralTimeUnits(nMinutes, PluralMinuteStrings); } else if (difference.TotalSeconds >= Minute) { // "about a minute ago" result = TimeResources.GetString("AboutAMinuteAgo"); } else { // "x seconds ago" or default to "2 seconds ago" if less than two seconds. int nSeconds = ((int)difference.TotalSeconds > 1.0) ? (int)difference.TotalSeconds : 2; result = GetPluralTimeUnits(nSeconds, PluralSecondStrings); } return(result); }