private void insertData()
    {
        string conStr = "server=127.0.0.1;user=user;" +
                         "database=newBase;password=12345";

        using (MySqlConnection con = new MySqlConnection(conStr))
        {
            try
            {
                string a = File.ReadAllText(@"title.txt", Encoding.Default);
                string b = File.ReadAllText(@"text_out.txt", Encoding.Default);


                string sql = "INSERT INTO items (Name, Cost) VALUES (@a, @b)";
                MySqlCommand cmd = new MySqlCommand(sql, con);
                cmd.Parameters.AddWithValue("@a", a);
                cmd.Parameters.AddWithValue("@b", b);
                con.Open();
                cmd.ExecuteNonQuery();


            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }