C# - failed parse exception?

Question

I am writing a program in C#, and I want to catch exceptions caused by converting \"\" (null) to int. What is the exception\'s name?

EDIT: I\'m not sur

Answer 1

Convert.ToInt32 does not throw a format exception ("input string is not in the correct format") on a null string. You can use that if it is acceptable for the result to be a 0 for a null string. (still pukes on empty string though)

        string s = null;
        int i = Convert.ToInt32(s);

But if you expect a number to be in the box, you should either use TryParse (as was suggested) or a Validator of some kind to inform the user that they need to enter a number.