private void btnAdd_Click(object sender, EventArgs e) { Customer newCus = new Customer(); newCus.CustomerID = -1; newCus.CompanyName = this.txtCompName.Text; newCus.Contactname = this.txtContName.Text; newCus.ContactTitle = this.txtContTitle.Text; newCus.Address = this.txtAddr.Text; newCus.City = this.txtCity.Text; newCus.Region = this.txtRegion.Text; newCus.Postalcode = this.txtPos.Text; newCus.Country = this.cbCountry.Text; newCus.Phone = this.txtPhone.Text; newCus.Fax = this.txtFax.Text; int check = newCus.isValid(); if (check < 0) { MessageBox.Show(newCus.getErrorMessage(check)); } else { this.dataModel.insertNewRow(newCus); MessageBox.Show("Completed"); clearAll(); } }