举例：
public string getAccessories(string productName, int pnPass1, int pnPass2)
        {
           string accessories = "";

            SQLiteConnection conn = new SQLiteConnection("Data Source=database/HexSettings.db;");
            conn.Open();
            SQLiteCommand cmd = new SQLiteCommand(conn);

            if (productName.Contains("A"))
            {
                = "select CC from List1 where ProductName ='" + productName + "' and LPN =" + pnPass1 + " and HPN =" + pnPass2;
            }
            else
            {
                = "select CC from List2 where ProductName ='" + productName + "' and PNPass1 =" + pnPass1 + " and PNPass2 =" + pnPass2;  
            }
             = CommandType.Text;
            SQLiteDataReader dr = cmd.ExecuteReader();

            if (dr.Read())
            {
                accessories = dr[0].ToString();
            }

            dr.Close();

            return accessories;

        现在我只能读取符合要求的第一个值，请问各位如何修改可以读取符合要求的所有值
谢谢！！