Question

Is there a string format that can be used on a decimal so that the following results are obtained?

123 => "123"
123.4 => "123.40"
123.45 => "123.45"
123.456 => "123.46"

In English, the number should always be displayed with exactly two decimals, except when it holds an integer value, when it should have no decimals (so no “123.00” displays are allowed).

Answer 1

I don’t know of any such format, I’m afraid. You might need to use:

string text = (d == (int) d) ? ((int) d).ToString() : d.ToString("N2");

EDIT: The code above will only work when d is in the range between int.MinValue and int.MaxValue. Obviously you can do better than that using long, but if you want to cover the full range of decimal you’ll need something a little more powerful.