当使用 .NET (C#) 的 SQL API 时，我应该输出什么作为文件的扩展名？

Question

I'm using the binaries from Microsoft.SqlServer.Management.Common, Microsoft.SqlServer.Management.Smo

The code is:

bkup.Devices.AddDevice(dbName, DeviceType.File);

bkup.CompressionOption = BackupCompressionOptions.On;

The extensions for the compressed.bak files are not there... is it.rar, .zip, etc, etc?

My program successfully backups up the dbs, but people are annoyed that there are no file extensions. The documentation for this API, says nothing about an extension when using BackupCompressions.On

Does anyone know? (sources appreciated)

Answer 1

I use '.bak' exstension for compressed backups. Maybe I'm wrong, but I cannot see why the extesion should be changed if backup is compressed.

Answer 2

SQL Server compresses data as it performs the backup. It does not first create a backup file and the compresses it using zip or rar, so you cannot use a tool such as zip or rar to un-compress the backup file. Compressed backup files only make sense to SQL Server itself.