How to show data and image in datagrid view from database using add button?

 private void LoadData()
        {
            setConnection();
            sql_con.Open();
            sql_cmd = sql_con.CreateCommand();
            string CommandText = "SELECT * FROM Car";
            DB = new SQLiteDataAdapter(CommandText, sql_con);
            DS.Reset();
            DB.Fill(DS);
            dgvCar.DataSource = DT
};

private void ExecuteQuery(String txtQuery)
       {
           setConnection();
           sql_con.Open();
           sql_cmd = sql_con.CreateCommand();
           sql_cmd.CommandText = txtQuery;
           sql_cmd.ExecuteNonQuery();
           sql_con.Close();
       }

       private void btnAdd_Click(object sender, EventArgs e)
       {
           string txtQuery = "INSERT INTO Car (car_id,plate_number,car_model,
                              car_brand,prev_maintenance,
                              next_maintenance,rate,description,carImage)
                              Values( '" + txtCarId.Text + "','" +
                              txtPlateNum.Text + "','"
                              + txtModel.Text + "','" + txtBrand.Text + "','" +
                              dtpPrev.Value.ToShortDateString() + "','"
                              + dtpNext.Value.ToShortDateString() + "','" +
                              numericPrice.Text + "','" + txtDesc.Text + "','" +
                              picBoxCar.Image + "')";

           ExecuteQuery(txtQuery);
           LoadData();
           MessageBox.Show("Car Added");
       }