Question
Can SimpleMembership be used with EF model-first? When I try it, I get "Unable to find the requested .NET Framework Data Provider" when I call WebSecurity.InitializeDatabaseConnection.
To put it another way: I can't get the call to WebSecurity.InitializeDatabaseConnection to work when the connection string employs the System.Data.EntityClient provider (as it does when using the model-first paradigm).
To repro the issue, create an MVC 4 app, and replace the code-first UserProfile entity class (which you get for free with the MVC 4 template) with a model-first User class that you have created in the Entity Designer:
- Create an MVC 4 app in VS 2012 and add a new, blank Entity Data Model.
- Add a new Entity named
Userto the model, with fields forId,UserName, and FullName. So, at this point, theUserdata entity is mapped to aUserstable and is accessed via a funky connection string that employs theSystem.Data.EntityClientprovider. - Verify that the EF can access the
Userentity. One easy way to do that is to scaffold out a Users controller based on the User table and its associated DbContext. - Edit the
AccountModels.csfile to remove theUserProfileclass and its associatedUsersContextclass. Replace the references to the (now missing)UserProfileandUsersContextclasses with references to your new User class and its associatedDbContextclass. - Move the call to InitializeDatabaseConnection from the InitializeSimpleMembershipAttribute filter class to the Application_Start method in Global.asax.cs. While you're at it, modify the arguments to use your new User entity's connection string, table name, and UserId column name.
- Delete the (no longer used)
InitializeSimpleMembershipAttributeclass and the references to it.
When you run the repro, it will get an Exception at the call to InitializeDatabaseConnection.
Bob
Accepted Answer
SimpleMembership can work with model first. Here is the solution.
1.InitializeSimpleMembershipAttribute.cs from MVC 4 Internet Application templete should look like this
namespace WebAndAPILayer.Filters
{
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public sealed class InitializeSimpleMembershipAttribute : ActionFilterAttribute
{
private static SimpleMembershipInitializer _initializer;
private static object _initializerLock = new object();
private static bool _isInitialized;
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
// Ensure ASP.NET Simple Membership is initialized only once per app start
LazyInitializer.EnsureInitialized(ref _initializer, ref _isInitialized, ref _initializerLock);
}
private class SimpleMembershipInitializer
{
public SimpleMembershipInitializer()
{
try
{
WebSecurity.InitializeDatabaseConnection("ConnStringForWebSecurity", "UserProfile", "Id", "UserName", autoCreateTables: true);
}
catch (Exception ex)
{
throw new InvalidOperationException("Something is wrong", ex);
}
}
}
}
}
2.Delete CodeFirst Classes from AcountModel.cs
3.Fix AccountCotroler.cs to work with your Model-first DbContext (ExternalLoginConfirmation(RegisterExternalLoginModel model, string returnUrl) method)
4.Define your "ConnStringForWebSecurity" connection string which is not same as that funky conn string for model-first db access, notice that we use provider System.Data.SqlClient not System.Data.EntityClient
<connectionStrings>
<add name="ModelFirstEntityFramework" connectionString="metadata=res://*/Context.csdl|res://*/Context.ssdl|res://*/Context.msl;provider=System.Data.SqlClient;provider
connection string="data source=.\SQLEXPRESS;Initial
Catalog=aspnet-MVC4;Integrated
Security=SSPI;multipleactiveresultsets=True;App=EntityFramework""
providerName="System.Data.EntityClient" />
<add name="ConnStringForWebSecurity" connectionString="data source=.\SQLEXPRESS;Initial Catalog=aspnet-MVC4;Integrated
Security=SSPI" providerName="System.Data.SqlClient" />
</connectionStrings>
Popular Answer
That's a bug in MVC 4. There's a workaround in this blog post.
As an action filter,
InitializeSimpleMembershipAttributehooks intoOnActionExecutingto perform the lazy initialization work, but this can be too late in the life cycle. The Authorize attribute will need the providers to be ready earlier if it needs to perform role based access checks (duringOnAuthorization). In other words, if the first request to a site hits a controller action like the following:
[Authorize(Roles="Sales")]
.. then you’ll have an exception as the filter checks the user’s role but the providers aren’t initialized.
My recommendation is to remove ISMA from the project, and initialize WebSecurity during the application start event.
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