Determine A Variable is Double.NaN
2011-06-06
How do you determine a double variable is Double.NaN ?
A sample:
if (minSelectX != Double.NaN)
{
DateTime timeMinSelectX = DateTime.FromOADate(minSelectX);
}
The code above is not correct. You will get an error like following:
The reason is when minSelectX is NaN, the condition of "if (minSelectX != Double.NaN)" will be still true.
The right code should be:
if(!double.IsNaN(minSelectX))
{
DateTime timeMinSelectX = DateTime.FromOADate(minSelectX);
}