public static string Description(MoneyRoundingMode roundMode)
{
switch (roundMode)
{
case MoneyRoundingMode.RoundUp:
return "Up";
case MoneyRoundingMode.RoundDown:
return "Down";
case MoneyRoundingMode.RoundNearest:
return "Nearest";
default:
return "Unknown";
}
}
public static decimal Round(MoneyRoundingMode mode, decimal roundingTo, decimal value)
{
if (mode == MoneyRoundingMode.NoRounding) return value;
if (roundingTo == 0M) return value;
decimal roundedValue = value;
decimal fromFloor = value % roundingTo;
decimal toCeiling = roundingTo - fromFloor;
if (toCeiling == roundingTo) toCeiling = 0.0M;
switch (mode)
{
case MoneyRoundingMode.RoundUp:
roundedValue += toCeiling;
break;
case MoneyRoundingMode.RoundDown:
roundedValue -= fromFloor;
break;
case MoneyRoundingMode.RoundNearest:
if (fromFloor < toCeiling)
{
roundedValue -= fromFloor;
}
else
{
roundedValue += toCeiling;
}
break;
default:
throw new InvalidOperationException(string.Format(
"The rounding mode \"{0}\" has not been added to the ApplyFinalRounding method in the rate charging system.",
mode));
}
return roundedValue;
}
