private void customerLogInToolStripMenuItem_Click(object sender, EventArgs e)
 {
     Login a1 = new Login();
     a1.MdiParent = this;
     a1.Show();
 }
        private void button_Add_Click(object sender, EventArgs e)
        {
            SqlConnection connection = new SqlConnection(global::project2v3_csc330.Properties.Settings.Default.PropertyDBConnectionString);
            try
            {
                string sql = "INSERT INTO CustomerTable(Customer_FirstName, Customer_LastName, Customer_Phone, Customer_Email, Customer_UserName, Customer_Password) VALUES ('" + txt_FirstName.Text + "', '" + txt_LastName.Text + "', '" + txt_Phone.Text + "', '" + txt_Email.Text + "', '" + txt_UserName.Text + "', '" + txt_Password1.Text + "')";
                SqlCommand commandInsert = new SqlCommand(sql, connection);
                connection.Open();
                commandInsert.ExecuteNonQuery();

                int customerid = 0;
                string sql2 = "SELECT * FROM CustomerTable WHERE Customer_UserName = @username";

                SqlCommand getStatuscmd = new SqlCommand(sql2, connection);
                getStatuscmd.Parameters.AddWithValue("@username", txt_UserName.Text);

                //connection.Open();
                using (SqlDataReader reader = getStatuscmd.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        customerid = Convert.ToInt32(reader["Customer_Id"].ToString());
                    }
                }

                MessageBox.Show("Add new account successfully!\nYour CustomerID is " + customerid, "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                connection.Close();
                this.Close();
                Login a1 = new Login();
                //a1.MdiParent = project2v3_csc330.MainForm;
                a1.Show();
            }
        }