Showing all data in access database file to datagridview

Question

Actually I'm trying to connect my winform data mining application to access database files through open dialogue box . As I'm trying to connect to any unknown database file so, I've no knowledge about its table names.but for connecting database to datagridview you have to provide sql query as command. My question is that , is there any way through which i can load all  data(records) in any connected access database file without specifying/knowing  tables names of a access db file.

thanks