/// <summary>
/// Truncs <see cref="DateTime"/> object to the selected accuracy.
/// </summary>
/// <param name="d"><see cref="DateTime"/> to round.</param>
/// <param name="rt">Accuracy.</param>
/// <returns>Truncated <see cref="DateTime"/>.</returns>
public static DateTime Trunc(this DateTime d, DateTimeAccuracy rt)
{
DateTime dtTruncated = new DateTime();
switch (rt)
{
case DateTimeAccuracy.Millisecond:
dtTruncated = new DateTime(d.Year, d.Month, d.Day, d.Hour, d.Minute, d.Second, d.Millisecond);
break;
case DateTimeAccuracy.Second:
dtTruncated = new DateTime(d.Year, d.Month, d.Day, d.Hour, d.Minute, d.Second);
break;
case DateTimeAccuracy.Minute:
dtTruncated = new DateTime(d.Year, d.Month, d.Day, d.Hour, d.Minute, 0);
break;
case DateTimeAccuracy.Hour:
dtTruncated = new DateTime(d.Year, d.Month, d.Day, d.Hour, 0, 0);
break;
case DateTimeAccuracy.Day:
dtTruncated = new DateTime(d.Year, d.Month, d.Day, 0, 0, 0);
break;
}
return(dtTruncated);
}
/// <summary>
/// Rounds <see cref="DateTime"/> object to the selected accuracy.
/// </summary>
/// <param name="d"><see cref="DateTime"/> to round.</param>
/// <param name="rt">Accuracy.</param>
/// <returns>Rounded <see cref="DateTime"/>.</returns>
public static DateTime Round(this DateTime d, DateTimeAccuracy rt)
{
DateTime dtRounded = new DateTime();
switch (rt)
{
case DateTimeAccuracy.Millisecond:
dtRounded = new DateTime(d.Year, d.Month, d.Day, d.Hour, d.Minute, d.Second, d.Millisecond);
break;
case DateTimeAccuracy.Second:
dtRounded = new DateTime(d.Year, d.Month, d.Day, d.Hour, d.Minute, d.Second);
if (d.Millisecond >= 500)
{
dtRounded = dtRounded.AddSeconds(1);
}
break;
case DateTimeAccuracy.Minute:
dtRounded = new DateTime(d.Year, d.Month, d.Day, d.Hour, d.Minute, 0);
if (d.Second >= 30)
{
dtRounded = dtRounded.AddMinutes(1);
}
break;
case DateTimeAccuracy.Hour:
dtRounded = new DateTime(d.Year, d.Month, d.Day, d.Hour, 0, 0);
if (d.Minute >= 30)
{
dtRounded = dtRounded.AddHours(1);
}
break;
case DateTimeAccuracy.Day:
dtRounded = new DateTime(d.Year, d.Month, d.Day, 0, 0, 0);
if (d.Hour >= 12)
{
dtRounded = dtRounded.AddDays(1);
}
break;
}
return(dtRounded);
}
public static int[] GetItemArray(this DateTime x, DateTimeAccuracy accuracy = DateTimeAccuracy.Millisecond)
{
switch (accuracy)
{
case DateTimeAccuracy.Date:
return(array(x.Year, x.Month, x.Day));
case DateTimeAccuracy.Hour:
return(array(x.Year, x.Month, x.Day, x.Hour));
case DateTimeAccuracy.Minute:
return(array(x.Year, x.Month, x.Day, x.Hour, x.Minute));
case DateTimeAccuracy.Second:
return(array(x.Year, x.Month, x.Day, x.Hour, x.Minute, x.Second));
case DateTimeAccuracy.Millisecond:
return(array(x.Year, x.Month, x.Day, x.Hour, x.Minute, x.Second, x.Millisecond));
}
throw new NotSupportedException();
}
/// <summary>
/// Renders a string in a more rational manner than the default behavior
/// </summary>
/// <param name="t">The instant to render</param>
/// <param name="accuracy">The accuracy with which to render the instant</param>
/// <returns></returns>
public static string ToLexicalString(this DateTime t, DateTimeAccuracy accuracy = DateTimeAccuracy.Millisecond)
{
var format = String.Empty;
var date = t.ToString("yyyy-MM-dd");
var hour = t.Hour.ToString().PadLeft(2, '0');
var minute = t.Minute.ToString().PadLeft(2, '0');
var second = t.Second.ToString().PadLeft(2, '0');
var ms = t.Millisecond.ToString().PadLeft(3, '0');
switch (accuracy)
{
case DateTimeAccuracy.Date:
format = date;
break;
case DateTimeAccuracy.Hour:
format = String.Format("{0} {1}:00:00:000", date, hour);
break;
case DateTimeAccuracy.Minute:
format = String.Format("{0} {1}:{2}:00:000", date, hour, minute);
break;
case DateTimeAccuracy.Second:
format = String.Format("{0} {1}:{2}:{3}:000", date, hour, minute, second);
break;
case DateTimeAccuracy.Millisecond:
format = String.Format("{0} {1}:{2}:{3}:{4}", date, hour, minute, second, ms);
break;
default:
throw new NotSupportedException();
}
return(format);
}
