The C TextBox control implements a method that only numbers can be entered

Simply write the following code in the keypress event of the control TextBox:

The code is as follows:

if (e.KeyChar == '.' && this.txbEnd.Text.IndexOf(".") != -1)

            {

                e.Handled = true;

            }


            if (!((e.KeyChar >= 48 && e.KeyChar <= 57) || e.KeyChar == '.' || e.KeyChar == 8))

            {

                e.Handled = true;

            }

Where.txbEnd is the name of the textbox control in your current form