asp Identity 2.0 adding new roles and adding user

问题:

I'm having trouble understanding the new Identity stuff. I'm trying to figure out how to add new roles and add user's to those roles. I'm trying to create a role management page and a user management page for my application and need to be able to do those two things. Everytime i try to add a role to a user like this: System.Web.Security.Roles.AddUserToRole("Andy", "admin"); I get "The Role Manager feature has not been enabled." I don't have a custom role provider and i tried turning role manager to enabled but just got an error about not having a role provider. I figured Identity had all this built in already? Can somebody help me through this?

回答1:

System.Web.Security is the old ASP.NET Membership framework. ASP.NET Identity is in the namespace Microsoft.AspNet.Identity. Use a RoleManager to create roles, and a UserManager to add users to roles.

using (var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(context)) 
{
    roleManager.Create(new IdentityRole("Administrator"));
}

using (var userManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context)))
{
    var user = new ApplicationUser { UserName = "admin" };
    userManager.Create(user, "admin321");
    userManager.AddToRole(user.Id, "Administrator");
}