ASP。NET Core-向用户添加角色声明

var claims = new List<Claim>
{
    new Claim(ClaimTypes.Name, UserName),
    new Claim(ClaimTypes.Role, "User"),
    new Claim(ClaimTypes.Role, "Admin"),
    new Claim(ClaimTypes.Role, Watever)
};

[Authorize(Roles = "Watever")]

或

User.IsInRole("Watever")

回答我自己,那么我做了什么:

创建我自己的UserClaimStore(我只需要这个商店,不需要其他商店):

public class MyIdentityStore :
    IUserClaimStore<IdentityUser>
{
    private MyDbContext _myDbContext;
    private bool _disposed = false; 

    public MyIdentityStore(MyDbContext myDbContext)
    {
        _myDbContext = myDbContext;
    }

    #region IUserClaimStore
    public Task<IList<Claim>> GetClaimsAsync(IdentityUser user, CancellationToken cancellationToken)
    {
        // logic here to retrieve claims from my own database using _myDbContext
    }

    // All other methods from interface throwing System.NotSupportedException.
    #endregion

    #region IDisposable Support

    protected virtual void Dispose(bool disposing)
    { /* do cleanup */ }
    #endregion
}

然后创建了我自己的ClaimTransformer:

public class MyClaimsTransformer : IClaimsTransformer
{
    private UserManager<IdentityUser> _userManager;

    public MyClaimsTransformer(UserManager<IdentityUser> userManager)
    {
        _userManager = userManager;
    }

    public async Task<ClaimsPrincipal> TransformAsync(ClaimsTransformationContext context)
    {
        var identity = ((ClaimsIdentity)context.Principal.Identity);

        // Accessing the UserClaimStore described above
        var claims = await _userManager.GetClaimsAsync(new IdentityUser(identity.Name));
        identity.AddClaims(claims);

        return await Task.FromResult(context.Principal);
    }
}

最后,在启动中。反恐精英:

    public void ConfigureServices(IServiceCollection services)
    {
        /* All other stuff here */ 

        // Adding Database connection
        services.AddDbContext<MyDbContext>(o => /* my options */);

        // Associates our database and store to identity
        services.AddIdentity<IdentityUser, IdentityRole>()
            .AddEntityFrameworkStores<MyDbContext>()
            .AddUserStore<MyIdentityStore>();

        // Claims transformation from database to claims
        services.AddTransient<IClaimsTransformer, MyClaimsTransformer>();
    }


    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        /* All other stuff here */ 

        app.UseIdentity();

        app.UseClaimsTransformation(async (context) =>
        { // Retrieve user claims from database
            IClaimsTransformer transformer = context.Context.RequestServices.GetRequiredService<IClaimsTransformer>();
            return await transformer.TransformAsync(context);
        });
    }

现在我可以自由使用 [Authorize(Roles = "MyRole")] User.IsInRole("MyRole") 甚至 User.HasClaim(/* */)

A. User 你说的对象有多个 Identities ,都可以有多个 Claims

另一种可能更简单的方法是创建一个新的标识对象(包含所有附加声明),并使用 AddIdentity() method .

User.Claims 该枚举将返回用户对象上所有身份的所有声明。

var myIdentity = new ClaimsIdentity(new []
{
    new Claim("claim type", "claim value"), 
    new Claim("claim type", "claim value"), 
    new Claim("claim type", "claim value"), 
});

context.User.AddIdentity(myIdentity);

使用者声称 将返回用户对象上的所有原始声明以及您的其他声明。