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annotate Chronosv2/source/Extensions/DateTimeOffsetExtensions.cs @ 10:443821e55f06

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author stevenh7776 stevenhollidge@hotmail.com
date Tue, 21 Feb 2012 17:25:44 +0700
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1 using System;
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2
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3 namespace Chronos.Extensions
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4 {
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5 /// <summary>
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6 /// Extension methods for the DateTimeOffset data type.
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7 /// </summary>
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8 public static class DateTimeOffsetExtensions
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9 {
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10 #region · Extensions ·
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11
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12 /// <summary>
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13 /// Indicates whether the date is today.
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14 /// </summary>
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15 /// <param name="dto">The date.</param>
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16 /// <returns>
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17 /// <c>true</c> if the specified date is today; otherwise, <c>false</c>.
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18 /// </returns>
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19 public static bool IsToday(this DateTimeOffset dto)
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20 {
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21 return (dto.Date.IsToday());
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22 }
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23
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24 /// <summary>
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25 /// Sets the time on the specified DateTimeOffset value using the local system time zone.
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26 /// </summary>
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27 /// <param name="date">The base date.</param>
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28 /// <param name="hours">The hours to be set.</param>
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29 /// <param name="minutes">The minutes to be set.</param>
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30 /// <param name="seconds">The seconds to be set.</param>
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31 /// <returns>The DateTimeOffset including the new time value</returns>
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32 public static DateTimeOffset SetTime(this DateTimeOffset date, int hours, int minutes, int seconds)
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33 {
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34 return date.SetTime(new TimeSpan(hours, minutes, seconds));
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35 }
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36
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37 /// <summary>
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38 /// Sets the time on the specified DateTime value using the local system time zone.
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39 /// </summary>
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40 /// <param name="date">The base date.</param>
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41 /// <param name="time">The TimeSpan to be applied.</param>
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42 /// <returns>
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43 /// The DateTimeOffset including the new time value
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44 /// </returns>
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45 public static DateTimeOffset SetTime(this DateTimeOffset date, TimeSpan time)
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46 {
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47 return date.SetTime(time, null);
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48 }
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49
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50 /// <summary>
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51 /// Sets the time on the specified DateTime value using the specified time zone.
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52 /// </summary>
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53 /// <param name="date">The base date.</param>
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54 /// <param name="time">The TimeSpan to be applied.</param>
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55 /// <param name="localTimeZone">The local time zone.</param>
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56 /// <returns>/// The DateTimeOffset including the new time value/// </returns>
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57 public static DateTimeOffset SetTime(this DateTimeOffset date, TimeSpan time, TimeZoneInfo localTimeZone)
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58 {
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59 var localDate = date.ToLocalDateTime(localTimeZone);
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60
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61 localDate.SetTime(time);
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62
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63 return localDate.ToDateTimeOffset(localTimeZone);
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64 }
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65
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66 /// <summary>
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67 /// Converts a DateTimeOffset into a DateTime using the local system time zone.
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68 /// </summary>
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69 /// <param name="dateTimeUtc">The base DateTimeOffset.</param>
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70 /// <returns>The converted DateTime</returns>
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71 public static DateTime ToLocalDateTime(this DateTimeOffset dateTimeUtc)
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72 {
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73 return dateTimeUtc.ToLocalDateTime(null);
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74 }
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75
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76 /// <summary>
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77 /// Converts a DateTimeOffset into a DateTime using the specified time zone.
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78 /// </summary>
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79 /// <param name="dateTimeUtc">The base DateTimeOffset.</param>
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80 /// <param name="localTimeZone">The time zone to be used for conversion.</param>
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81 /// <returns>The converted DateTime</returns>
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82 public static DateTime ToLocalDateTime(this DateTimeOffset dateTimeUtc, TimeZoneInfo localTimeZone)
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83 {
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84 localTimeZone = (localTimeZone ?? TimeZoneInfo.Local);
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85
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86 return TimeZoneInfo.ConvertTime(dateTimeUtc, localTimeZone).DateTime;
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87 }
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88
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89 #endregion
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90 }
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91 }