How to bulk validate data from a userform?

Question

C++ / C#

winforms. there are 20 TextBoxes and 20 Labels nearby (they say what tb means).
All values ​​are entered by the user. All values ​​must be double.
I usually write something like this (probably shitty code):

spoiler

private void TbLnsDist_TextChanged(object sender, EventArgs e)
        {
            string val = tbLnsDist.Text;
            val = val.Replace(",", decimal_sep);
            val = val.Replace(".", decimal_sep);

            double number;
            bool res = double.TryParse(val, out number);
            if (res == false)
            {
                lbLnsDist.Text = "Введите число!";
                lbLnsDist.ForeColor = Color.Red;
                btnLnsCreate.Enabled = false;
            }
            else
            {
                lbLnsDist.Text = "Дистанция";
                lbLnsDist.ForeColor = Color.Black;
                btnLnsCreate.Enabled = true;
            }
        }

However, there are a lot of controls.
What is the correct way to check in such cases? separate class with methods? Or nevertheless in each control to write the check?

Answer 1

Write your own control that will only accept double and no checks are needed