A good end using the ASP.NET program using the SQL Server database is changed to the Access database, it is not possible to delete, that is, there is a need to updateable recordset, search for the Internet, ask questions, answer less, someone Reply, give the MDB file to Everyone all permissions, after testing, there is no way. After rigorous analysis, the following summary is made: we have to resolve: 1. ASP.NET can make the database to delete the database; 2. Blocking the URL request for the database. We need to do the following: 1. MDB database files in the Explorer give an ASPNET user to the read write permission; 2. Set the URL request to the MDB database file to: a redirection to a URL in IIS: File)