Update Data Grid

gistfile1.cs

        private void btnCustAdd_Click(object sender, EventArgs e)
        {
            if ((txtCustFirst.Text.Length == 0) || (txtCustFirst.Text == "First") || (txtCustLast.Text.Length == 0) || (txtCustLast.Text == "Last") || (txtCustHouse.Text.Length == 0) || (txtCustHouse.Text == "House") || (txtCustStreet.Text.Length == 0) || (txtCustStreet.Text == "Street") || (txtCustTown.Text.Length == 0) || (txtCustTown.Text == "Town") || (txtCustCounty.Text.Length == 0) || (txtCustCounty.Text == "County") || (txtCustPostcode.Text.Length == 0) || (txtCustPostcode.Text == "Postcode") || (txtCustHPhone.Text.Length == 0) || (txtCustHPhone.Text == "Home") || (txtCustMPhone.Text.Length == 0) || (txtCustMPhone.Text == "Mobile"))
            {
                MessageBox.Show("Please ensure all fields are not null", "Error");
            }

            else
            {
                try
                {
                   Program.AuspexDo.addCustomer(txtCustFirst.Text, txtCustLast.Text, txtCustHouse.Text, txtCustStreet.Text, txtCustTown.Text, txtCustCounty.Text, txtCustPostcode.Text, txtCustHPhone.Text, txtCustMPhone.Text);
                   bindCustomerList();
                   bindSupplierList();
                   bindMechanicList();
                   bindCarList();
                   bindPartsList();
                   bindJobRefList();

                   updateDataGrid(); // this method then calls from the list of type customers in the Auspex Class instance AuspexDo.
                }
                catch
                {
                    MessageBox.Show("Please ensure fields are entered correctly", "Error");
                }
            }
        }