SQLExpress database file auto-creation error:

soufya · September 16th, 2011, 05:29 AM

SQLExpress database file auto-creation error:

The connection string specifies a local Sql Server Express instance using a database location within the application's App_Data directory. The provider attempted to automatically create the application services database because the provider determined that the database does not exist. The following configuration requirements are necessary to successfully check for existence of the application services database and automatically create the application services database:

If the application is running on either Windows 7 or Windows Server 2008R2, special configuration steps are necessary to enable automatic creation of the provider database. Additional information is available at: http://go.microsoft.com/fwlink/?LinkId=160102. If the application's App_Data directory does not already exist, the web server account must have read and write access to the application's directory. This is necessary because the web server account will automatically create the App_Data directory if it does not already exist.
If the application's App_Data directory already exists, the web server account only requires read and write access to the application's App_Data directory. This is necessary because the web server account will attempt to verify that the Sql Server Express database already exists within the application's App_Data directory. Revoking read access on the App_Data directory from the web server account will prevent the provider from correctly determining if the Sql Server Express database already exists. This will cause an error when the provider attempts to create a duplicate of an already existing database. Write access is required because the web server account's credentials are used when creating the new database.
Sql Server Express must be installed on the machine.
The process identity for the web server account must have a local user profile. See the readme document for details on how to create a local user profile for both machine and domain accounts.
i changed the iis asp.net v4.0 to network services but cannot solve my problem here is my configuration file:
Code:

Code:

  <connectionStrings>
    <add name="PlanetWroxConnectionString1" connectionString="Data Source=.;AttachDbFilename=|DataDirectory|\PlanetWrox.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" />
    <add name="PlanetWroxEntities" connectionString="metadata=res://*/App_Code.PlanetWrox.csdl|res://*/App_Code.PlanetWrox.ssdl|res://*/App_Code.PlanetWrox.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=.;AttachDbFilename=|DataDirectory|\PlanetWrox.mdf;Integrated Security=True;User Instance=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>
  <system.web>
    <authentication mode="Forms" />
    <pages theme="Monochrome">
      <controls>
        <add tagPrefix="Wrox" tagName="Banner" src="~/Controls/Banner.ascx" />
      </controls>
    </pages>

that i modified as the try it out exercise
any solution?

Imar · September 16th, 2011, 01:58 PM

Hi there,

Did you install SQL Server Express as per the instructions in Chapter 1? This would really be the easiest way to resolve the issue during development.

Alternatively, you can use a different SQL Server instance but it requires more work. First of all, you need to attach the database to SQL Server or create a new one. Then you need to drop the AttachDbFilename and User Instance attributes from the connection string and replace it with an Initial Catalog. Finally, when using Membership you need to configure the database using aspnet_regsql and override the settings in web.config.

Chapter 19 and Appendix B deal with this in detail.

Cheers,

Imar

soufya · September 17th, 2011, 06:26 PM

but i have sql server 2008 express edition
and can use it's DBs, my problem is that it cannot create the db,
how chapter 19 and apendix b can help me,