WinForm +access Data connection error is not registered on the local computer "microsoft.jet.oledb.12.0"

Microsoft is not registered on the local computer. Jet . oledb.12.0 "provider.

1. Database connection string:

2007 Database Connection string:

Constr= "Provider=microsoft. Jet. Oledb.12.0;data source=e:\spendingvoucher.accdb; Persist Security Info=false ";

2. An exception occurred: the "microsoft.jet.oledb.12.0" provider was not registered on the local computer.

Download and install the AccessDatabaseEngine.exe and reboot, run or error

check the Internet. for People microsoft.ace.oledb.12.0 , replace microsoft.jet.oledb.12.0 ,

I tried it, it worked! But I don't understand.

So the correct connection string is:

constr= "Provider=microsoft. ACE . Oledb.12.0;data source=e:\spendingvoucher.accdb; Persist Security info=false ";

WinForm +access Data connection error is not registered on the local computer "microsoft.jet.oledb.12.0"