Question

When using(attempting) the SqlFileStream object, I am receiving an error

System.ComponentModel.Win32Exception: Logon failure: unknown user name or bad password

I’m a little perplexed by this.

• I’m using SQL Server authentication in the connection string
• I can write to the table in question except for the FILESTREAM column
• The SQLSERVER service is running under an account that has full privileges to the physical filestream directory
• The filestream directory does not have READONLY flagged.

Am I required to use a ‘Windows Integrated Security’ connection string to make this work?

Answer 1

Filestream doesn’t work with SQL Authentication. From FILESTREAM Storage in SQL Server 2008:

Security

There are two security requirements
for using the FILESTREAM feature.
Firstly, SQL Server must be configured
for integrated security. Secondly, if
remote access will be used, then the
SMB port (445) must be enabled through
any firewall systems.

See also How It Works: File Streams Requires Integrated Security (Windows Authentication).