Chapter 18 - Failed to generate a user instance of SQL Server

SeanCunningham · October 31st, 2010, 12:11 PM

Once delivered via IIS, the application will successfully start up the PlanetWrox database but not the ASPNETDB database. I can navigate into the gig pics and reviews sections, but cannot log in.

When I try to log in I get the error:

Quote:

Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed.

Connection strings from the webconfig file:

Code:

<add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/>
<add name="PlanetWroxConnectionString1" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\PlanetWrox.mdf;Integrated Security=True;User Instance=true" providerName="System.Data.SqlClient"/>

I am using Windows Vista. I built the application in Microsoft Visual Web Developer 2010 Express and have installed SQL Server 2010 Express. The application runs in the DefaultAppPool on version 4.0.

Imar · October 31st, 2010, 12:51 PM

Hi there.

Quote:

and have installed SQL Server 2010 Express.

That doesn't exist, so I assume you're using SQL Server 2008?

Try removing the User Instance attribute from the web.config or attach the databases to SQL Server and modify your connection strings as explained in Appendix B.

Alternatively, take a look at existing posts on this subject: http://p2p.wrox.com/search.php?searchid=305747

Hope this helps,

Imar

SeanCunningham · November 1st, 2010, 11:03 AM

SQL Server 2008, yes sorry.

I've tried the things you mentioned and messed around with a few other things in another thread that reported the same error message. I get errors trying to attach the DBs as well.

Since I've pulled the aspnet user tables into my main database anyway on the project I'm now working on, as you discuss in Appendix B (very useful, by the way, thanks for including that), I think I can put this down to something silly Vista is doing and not worry about it.

Thanks for the quick response.

Imar · November 2nd, 2010, 03:55 AM

You're welcome, and good to hear you can continue. Have fun with the rest of the book.

Cheers,

Imar