Constraints in TextBox

I made one a while ago that may be of use - here[^].

It is a NumericTextBox rather than a NumberTextBox as it still treats the input as a string, no decimal point and no - sign.

Try using a NumericUpDown instead. Maybe it will do the job for you.

Rather than rolling your own logic, you could always use a masked edit box. It makes sense to use something that's been written for you rather than you having to try and manage it yourself.

Genius.Boy wrote:

Is there a way to restrict users to input only numbers in TextBox control

Yes their is a way....

all u have to do is copy paste this piece of code in the key press event of your textbox where u want only numbers to appear and you are done, now lets say you are validating for mobile numbers then

private void txtmobile_KeyPress(object sender, KeyPressEventArgs e)
        {
//only number code
            if (char.IsNumber(e.KeyChar) == false)
            {
                e.Handled = true;
            }
//backspace working code
            if (e.KeyChar == (char)Keys.Back)
            {
                e.Handled = false;
            }
        }

do rate my answer once you find it useful

Thanks & regards
Radix :rose: