Formatting in a textbox C#

Question

I want to format my textbox to have 4 numerical integers at all times. Example 90 would equal 0090. I also do not want letters to be entered. Any help would be greatly appreciated

Answer 1

You mean like a Masked Textbox ? You can use a mask of "0000" to ensure only numbers can be entered, and that you need four of them.

If it's for asp.net you could look at a MaskedEdit or a jQuery solution.