十进制的值太大或太小

Question

I have the following piece of code:

double shortfall = GetSomeNumber(); //3.3588548831176006E+29

if (shortfall > 0)
{
  returnValue = Convert.ToDecimal(shortfall);
}

That generates the above error.

Answer 1

Well, it's fairly self-explanatory.

decimal.MaxValue is 79,228,162,514,264,337,593,543,950,335 - your number is bigger than this.

Although decimal has a finer precision than double , double has a bigger range - it can handle very, very large and very, very small numbers.

Now, if you could tell us what you're really trying to do, we could try to help find a solution... it's rarely a good idea to mix double and decimal , to be honest.

Answer 2

It means that the value returned cannot be converted to decimal as it is too large.

Decimal values can be between positive 79,228,162,514,264,337,593,543,950,335 to negative 79,228,162,514,264,337,593,543,950,335 - see MSDN .

Double can handle much larger numbers - negative 1.79769313486232e308 to positive 1.79769313486232e308. These will not all be convertible to Decimal.