private void registerButton_Click(object sender, EventArgs e) { string name = userNameTextBox.Text; string password = passwordTextBox.Text; string confirmPassword = confirmPasswordTextBox.Text; string address = addressTextBox.Text; int id = SqlManage.queryMaxCustomerId() + 1; if (password == confirmPassword) { Customer customer = new Customer(id, name, password, address); SqlManage.insertCustomer(customer); } else { MessageBox.Show("两次密码不一致!"); } }