serialbox

serialbox.cs

            

        private const int MaxLen = 7;

            txtSerial1.MaxLength = MaxLen;
            txtSerial2.MaxLength = MaxLen;
            txtSerial3.MaxLength = MaxLen;
            txtSerial4.MaxLength = MaxLen;


        private void txtSerial1_TextChanged(object sender, EventArgs e)
        {
            if (txtSerial1.TextLength == MaxLen)
            {
                txtSerial2.Focus();
            }
        }

        private void txtSerial2_TextChanged(object sender, EventArgs e)
        {
            if (txtSerial2.TextLength == MaxLen)
            {
                txtSerial3.Focus();
            }
        }

        private void txtSerial3_TextChanged(object sender, EventArgs e)
        {
            if (txtSerial3.TextLength == MaxLen)
            {
                txtSerial4.Focus();
            }
        }

        private void txtSerial4_TextChanged(object sender, EventArgs e)
        {
            if (txtSerial4.TextLength == MaxLen)
            {
                btnSave.Focus();
            }
        }


        private void txtSerial4_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (txtSerial4.TextLength == 0 && e.KeyChar == (char) Keys.Back)
            {
                txtSerial3.Focus();
            }
        }

        private void txtSerial3_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (txtSerial3.TextLength == 0 && e.KeyChar == (char)Keys.Back)
            {
                txtSerial2.Focus();
            }
        }

        private void txtSerial2_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (txtSerial2.TextLength == 0 && e.KeyChar == (char)Keys.Back)
            {
                txtSerial1.Focus();
            }
        }