Can I format NULL values in string.Format?

Question

I was wondering if there\'s a syntax for formatting NULL values in string.Format, such as what Excel uses

For example, using Excel I could specify a format value of

Answer 1

It looks like String.Format for .NET acts the same way as Excel, i.e., you can use ; separator for positive, negative, and 0 values, but not NULL: http://msdn.microsoft.com/en-us/library/0c899ak8.aspx#SectionSeparator.

You will probably just have to handle the null value manually:

if (myval == null)
    // handle
else
    return String.Format(...);