Question

How to make a numeric TextBox that only accepts numbers and decimals using WinForms in C#

Answer 1

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            // ASCII 46 = '.' dot
            // '\b' = backspace 
            if (Char.IsDigit(e.KeyChar) || e.KeyChar == '\b' || e.KeyChar == 13 || e.KeyChar == 46)
            {
                e.Handled = false;
            }
            else
            {
                e.Handled = true;
            }
        }
    }
}



/*
run:
 


*/

 

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