IP Address in a MaskedTextBox?

Question

How can I use a MaskedTextBox to prevent the user from entering an invalid IP address? (I want it to behave just like the Windows one).

Answer 1

There is no complex solution for this question yet. I think @HaraldDutch answer is closest, but it is not prevet from input with space character. Using additional instruction:

IPAdressBox.ResetOnSpace = false;

generaly solved problem, but more complex is to implement own custom data typewith Parse method.

            public class IPValidator
            {
                public static IPValidator Parse(string input)
                {
                    Regex regexpr = new Regex(@" ");
                    Match match = regexpr.Match(input);
                    if (match.Success)
                        return new IPValidator();
                    else throw new ArgumentException(input);
                }
            }

Where regexpr is specific expresion to validate IP. After that it can be use as ValidatingType:

 IPAdressBox.ValidatingType = typeof(IPValidator);