Key concepts in this chapter are:
Identifying various forms of input
Using Windows Forms input-validation features
Using ASP.NET validation controls
Using regular expressions and Parse commands to validate data
As long as there have been computers, there has been computer input in one form or another. A bank of switches, for example, was used to provide input into the MITS Altair 8800 (the first personal computer) to perform simple computer tasks; the output displayed as a series of blinking lights.
Input has evolved along with the methods of providing input. Today you can use a variety of means to enter data into your computer, including keyboard, mouse, pen, voice, bar-code scanner, or brake-pedal pressure (as input to ...