I have gone through all the tutorials I can find and I can’t get the database connected. Now the program won’t open I get an error message saying I have the wrong connection string, but I’ve tried every variation I can think of and still it won’t work.
Data Source=RAHUL/SQLEXPRESS; User Id=sa; Password=sambapos; Database=SAMBAPOS
So you installed SQL Express and setup a database instance called SQLEXPRESS and you enabled mixed mode authentication and enabled sa user and gave it password sambapos?
Can you access your database using MSSMS (Microsoft SQL Server Management Studio)?