Is there BETWEEN DateTime in C# just like SQL does?

Question

Is there between DateTime in C# ? I know I can do simple check with if (a > date1 && a < date2) but I was trying to find Between meth

Answer 1

Building on @richardschneider answer, my solution adds a boundary range type as a parameter.

public enum RangeBoundaryType
{
    [Description("Exclusive")]
    Exclusive,

    [Description("Inclusive on both boundaries")]
    Inclusive,

    [Description("Inclusive on only the lower boundary")]
    InclusiveLowerBoundaryOnly,

    [Description("Inclusive on only the upper boundary")]
    InclusiveUpperBoundaryOnly
}

public static bool Between(this IComparable value, IComparable comparator0, IComparable comparator1, RangeBoundaryType rangeBoundary)
{
    switch (rangeBoundary)
    {
        case RangeBoundaryType.Exclusive:
            return (value.CompareTo(comparator0) > 0 && value.CompareTo(comparator1) < 0);

        case RangeBoundaryType.Inclusive:
            return (value.CompareTo(comparator0) >= 0 && value.CompareTo(comparator1) <= 0);

        case RangeBoundaryType.InclusiveLowerBoundaryOnly:
            return (value.CompareTo(comparator0) >= 0 && value.CompareTo(comparator1) < 0);

        case RangeBoundaryType.InclusiveUpperBoundaryOnly:
            return (value.CompareTo(comparator0) > 0 && value.CompareTo(comparator1) <= 0);

        default:
            return false;
    }
}

Answer 2

FWIW, BETWEEN is inclusive, not exclusive WRT to its bounds. Anyway, here you go:

public static bool Between(this DateTime instant, DateTime dtFrom , DateTime dtThru )
{
  if (dtFrom > dtThru) throw new ArgumentException( "dtFrom may not be after dtThru", "dtFrom" );
  bool isBetween = ( instant >= dtFrom && instant <= dtThru );
  return isBetween;
}

Answer 3

This way is fast and the parameters are reversible:

public static bool BetweenInclusive(this DateTime value, DateTime a, DateTime b)
{
    return ((a <= value) && (value <= b)) || ((b <= value) && (value <= a));
}