Returning one selected value from an Access DataBase in C#

[jenniferc2007]

Hello all!! I am coding a simulated ATM for my software eng class. I would consider myself to be an intermediate programmer, but I have run into a huge problem. I have opened and linked my database to my C# project;
however I can not get the SQL statement "Select FreeChecking from BankAccount where PIN = ..."; to return the value that is saved in the database.
HELP PLEASE! I am attaching snippets of my code

//--------------------------------------------------------
            //This method returns one selected record from database.
            //--------------------------------------------------------

            public DataTable RecordSelect(String Sql)
            {
               
                cmd = new OleDbCommand(Sql, conn);
                adapter = new OleDbDataAdapter(Sql, conn);
                dt = new DataTable();
                adapter.Fill(dt);
                return dt;
            }

String sqlText = String.Format("SELECT FreeChecking FROM BankAccount2 where PIN = {0};", PIN);
              dt =   db.RecordSelect(sqlText);



                for (int i = 0; i < atmData.Rows.Count; i++)
                {
                    try
                    {
                        string msg = String.Format("{0} {1} {2:c} {3:c}",
                            atmData.Rows[i]["User"],
                            atmData.Rows[i]["PIN"],
                            atmData.Rows[i]["FreeChecking"],
                            atmData.Rows[i]["PersonalSavings"]);

                        MessageBox.Show(msg);
                    }
                    catch (Exception)
                    {
                    }

                }

[tlhintoq]

Until someone with more experience can offer more targeted advice I can point you toward these:

Database tutorial Part 1
Database tutorial Part 2