Hi,

Does C# provide a method to check/validate whether the value is a whole
number not?
Thanks.

Regards,
Siew Yee

"Siew Yee" <SiewYee (AT) discussions (DOT) microsoft.com> wrote

Reaseach the .NET Framework Convert class. If, for example, you were to use
the Convert.ToInt32 method in a try - catch block, any attempt to convert an
argument that is not an integer will throw an exception and you can deal
with it.

--
Peter [MVP Visual Developer]
Jack of all trades, master of none.

Thanks. I will go try it out.

"Peter van der Goes" wrote:

(see inline)

"Peter van der Goes" <p_vandergoes (AT) toadstool (DOT) u> wrote

I have the source code (from MS "Shared Source", though i can't remember
actually where I found it) for a number of the framework classes, including
Convert. Converting from a "double" to an Int32 is allowed and does not
throw exceptions (except out of bounds). Since the shared source is public,
here's the code excerpt:

public static int ToInt32(double value) {
if (value >= 0) {
if (value < 2147483647.5) {
int result = (int)value;
double dif = value - result;
if (dif > 0.5 || dif == 0.5 && (result & 1) != 0) result++;
return result;
}
}
else {
if (value >= -2147483648.5) {
int result = (int)value;
double dif = value - result;
if (dif < -0.5 || dif == -0.5 && (result & 1) != 0) result--;
return result;
}
}
throw new
OverflowException(Environment.GetResourceString("O verflow_Int32"));
}

Scott