Cannot insert data into Local Database in WPF

Question

In a project, I have a local database, (I am using the datagrid to view the data), but the problem is that when I insert into database using the insertion query, the inserti

Answer 1

In what folder is your application running? If it is in the Program Files tree you likely do not have write permissions to the sdf file (especially on Windows 7 unless you have turned off UAC or are elevating your app prior to execution).

Even if that is not your short term issue I would recommend finding a different place for the sdf file, such as one of the AppData locations. Expecting to be able to write to your install location is not a guaruntee and depends on how and where your app is deployed.