C# control validation

Question

How is it possible to apply masking to a c# control for a window application. I want a textbox to take only values of this format (###)###-#### FOR TELEPHONE NUMBER

rmtielman · Answer

Thks jamesdivine

james · Answer

I'm not sure if there are other ways of doing it but if it were me I'd create method like this... private bool isTelephoneNumber(string mytext) { // logic here } then in your Validating event... if(isTelephoneNumber(mytextbox.Text) == false) { e.Cancel = true; }