public override void Validate(string value)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
base.Validate(value);
int parsedValue;
if (!Int32.TryParse(value, out parsedValue))
{
throw new FormatException("Value cannot be parsed as an integer.");
}
if (AlwaysAllowZero && parsedValue == 0)
{
return;
}
if (MinValue != int.MinValue && parsedValue < MinValue)
{
throw new FormatException(String.Format("Value is too low ({0}); expected at least {1}.", parsedValue,
MinValue));
}
if (MaxValue != int.MaxValue && parsedValue > MaxValue)
{
throw new FormatException(String.Format("Value is too high ({0}); expected at most {1}.", parsedValue,
MaxValue));
}
if (MultipleOf != 0 && (parsedValue % MultipleOf != 0))
{
throw new FormatException(String.Format("Value ({0}) is not a multiple of {1}.", parsedValue,
MultipleOf));
}
if (PowerOfTwo)
{
bool found = false;
for (int i = 0; i < 31; i++)
{
if (parsedValue == (1 << i))
{
found = true;
break;
}
}
if (!found && parsedValue != 0)
{
throw new FormatException(String.Format("Value ({0}) is not a power of two.", parsedValue));
}
}
if (ValidValues != null)
{
if (ValidValues.All(t => parsedValue != t))
{
throw new FormatException(String.Format("Value ({0}) is not on the list of valid values.",
parsedValue));
}
}
if (InvalidValues != null)
{
if (InvalidValues.Any(t => parsedValue == t))
{
throw new FormatException(String.Format("Value ({0}) is on the list of invalid values.",
parsedValue));
}
}
}