Not allow zero in textbox

Question

I need a textbox which only the user can permit to enter integers. But the user can't enter zero. i.e, he can enter 10,100 etc. Not 0 alone. How can I make event in KeyDown?

Answer 1

The way you plan to do this, is very annoying for a user. You're guessing what a user wants to enter, and act upon your guess, but you can be so wrong.

It also has holes, for example, a user can enter "10" and then delete the "1". Or he could paste in a "0" -- you do allow paste, don't you?

So my solution would be: let him enter any digit he likes, any way he likes, and validate the input only after he finished, for example, when the input loses focus.

Answer 2

Why not using a NumericUpDown and make the following settings:

upDown.Minimum = 1;
upDown.Maximum = Decimal.MaxValue;