Добавил и подключил БД, но оно не выводит данные в датагрид

using System;
using System.Windows.Forms;
using System.Data.SqlClient;
 
namespace Auto_repair_shop{
    public partial class Form2 : Form{
        public Form2() {
            InitializeComponent();
        }
        SqlConnection connection = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\feedf\source\repos\Auto_repair_shop\Auto_repair_shop\Database.mdf;Integrated Security=True");
        SqlDataAdapter dataAdapter = new SqlDataAdapter();
        DatabaseDataSet dataSet = new DatabaseDataSet();
 
        private void DatabaseUpdate(){
            dataGridView1.DataSource = null;
            dataSet.Clear();
            connection.Open();
            SqlCommand command_select = new SqlCommand("Select * From Owner", connection);
            dataAdapter.SelectCommand = command_select;
            dataAdapter.Fill(dataSet);
            dataGridView1.DataSource = dataSet.Tables[0];
            connection.Close();
        }
 
        void DataAdd() {
            //добавление записи
            dataGridView1.DataSource = null;
            dataSet.Clear();
            connection.Open();
 
            SqlCommand comand = new SqlCommand("Insert Into [dbo].[Owner] Values (@Id_owner, @FIO, @Phone_number, @Driver_license_number)", connection);
            comand.Parameters.AddWithValue("@Id_owner", Convert.ToInt64(textBox1.Text));
            comand.Parameters.AddWithValue("@FIO", textBox2.Text);
            comand.Parameters.AddWithValue("@Phone_number", textBox3.Text);
            comand.Parameters.AddWithValue("@Driver_license_number", textBox4.Text);
 
            dataAdapter.SelectCommand = comand;
            dataAdapter.Fill(dataSet);
            dataGridView1.DataSource = dataSet.Tables[0];
            connection.Close();
 
            DatabaseUpdate();//вызов метода обновления dataGridView
        }
 
        void DataChange() {
            SqlCommand command = new SqlCommand("Update dbo.Owner set FIO=@FIO, Phone_number=@Phone_number, Driver_license_number=@Driver_license_number Where Id_owner = " + dataGridView1[0, dataGridView1.CurrentRow.Index].Value, connection);
            dataGridView1.DataSource = null;
            dataSet.Clear();
            connection.Open();
 
            command.Parameters.AddWithValue("@FIO", textBox2.Text);
            command.Parameters.AddWithValue("@Phone_number", textBox3.Text);
            command.Parameters.AddWithValue("@Driver_license_number", textBox4.Text);
 
            dataAdapter.SelectCommand = command;
            dataAdapter.Fill(dataSet);
            dataGridView1.DataSource = dataSet.Tables[0];
            connection.Close();
 
            DatabaseUpdate();
        }
 
        void DataDelete(){
            SqlCommand command = new SqlCommand("Delete From dbo.Owner where Id_owner = " + dataGridView1[0, dataGridView1.CurrentRow.Index].Value, connection);
 
            dataGridView1.DataSource = null;
            dataSet.Clear();
            connection.Open();
 
            dataAdapter.SelectCommand = command;
            dataAdapter.Fill(dataSet);
            dataGridView1.DataSource = dataSet.Tables[0];
            connection.Close();
 
            DatabaseUpdate();
        }
  private void button5_Click(object sender, EventArgs e){
            DataAdd();
        }
 
        private void button4_Click(object sender, EventArgs e){
            DatabaseUpdate();
        }
 
        private void button6_Click(object sender, EventArgs e){
            DataChange();
        }
 
        private void button7_Click(object sender, EventArgs e){
            DataDelete();
        }