How to configure ASP.NET Identity ApplicationUserManager with StructureMap

Question

I am using asp.net identity in my project and using structuremap as DI framework. the problem is when i use constructor injection then ApplicationUserManager not configured

Answer 1

Before you create the StructureMap configuration for this, it helps to know how you would create it manually, i.e., if you actually "new up" everything yourself.

UserManager has a dependency on IUserStore, and its EntityFramework implementation (UserStore) has a dependency on DbContext. Doing everything manually would look like this:

var dbContext = new IdentityDbContext("Your ConnectionString Name");
var userStore = new UserStore<IdentityUser>(dbContext);
var userManager = new UserManager<IdentityUser>(userStore);

(Replace IdentityUser with your custom user, if you are using one)

You can then configure UserManager like this:

userManager.PasswordValidator = new PasswordValidator
{
    RequiredLength = 6
};

The most complicated part about configuring userManager is related to the UserTokenProvider (that uses the data protection api), if you would do it manually it would look like this:

var dataProtectionProvider = new DpapiDataProtectionProvider("Application name");
var dataProtector = dataProtectionProvider.Create("Purpose");
userManager.UserTokenProvider = new DataProtectorTokenProvider<IdentityUser>(dataProtector);

Here's an example of a StructureMap registry (you can extrapolate from this example and adapt it to your own needs):

 public DefaultRegistry() {
        Scan(
            scan => {
                scan.TheCallingAssembly();
                scan.WithDefaultConventions();
                scan.With(new ControllerConvention());
            });


        For<IUserStore<IdentityUser>>()
            .Use<UserStore<IdentityUser>>()
            .Ctor<DbContext>()
            .Is<IdentityDbContext>(cfg => cfg.SelectConstructor(() => new IdentityDbContext("connection string")).Ctor<string>().Is("IdentitySetupWithStructureMap"));

        ForConcreteType<UserManager<IdentityUser>>()
            .Configure
            .SetProperty(userManager => userManager.PasswordValidator = new PasswordValidator
            {
                RequiredLength = 6
            })
            .SetProperty(userManager => userManager.UserValidator = new UserValidator<IdentityUser>(userManager));                
    } 

I wrote a blog post about this, it explains the process that lead to this configuration, there's also a link to an example on github of an MVC project where, using this configuration, you can create, list and delete users.