How can I allow only 0 or 1 to be entered in a TextBox?

Question

How can I limit the TextBox control to only allow the values 0 and 1?

Thanks. And I have one more question: How can I disable put text from clipboard in my textbox c

Answer 1

If you do want to show the numbers rather than a check or something but only want to allow 0 or 1 you could use a NumericUpDown control and set min to 0 max to 1 and step to 1.

If you do actually need a textbox I'd use Filip's answer but I'd set the MaxLength of it to 1 to avoid having to worry about 00, 11 or 01 or similar values.