使用单独的类获取asp.net核心身份中的所有角色

时间:2018-08-16 14:51:57

标签: c# .net asp.net-core asp.net-identity identityserver4

我一直试图从asp.net核心身份中获取所有角色的列表,这是我在使用控制器之前所做的工作:

public AdminController(
        UserManager<ApplicationUser> userManager,
        ILogger<AccountController> logger,
        IEmailSender emailSender,
        RoleManager<IdentityRole> roleManager,
        SignInManager<ApplicationUser> signInManager)
    {
        _userManager = userManager;
        _logger = logger;
        _emailSender = emailSender;
        _roleManager = roleManager;
        _signInManager = signInManager;
    }

private void PuplateRolesList(RegisterViewModel model)
    {
        model.Roles = _roleManager.Roles?.ToList();
    }

我想做的是有一个可以重用的类,该类将传回所有角色的列表,而不使用控制器,我尝试这样做:

var roleStore = new RoleStore<AppRole, int, AppUserRole>(dbContext);
var roleMngr = new RoleManager<AppRole, int>(roleStore);

但是在一个类中,它显然没有构造角色管理器或dbContect,所以我自己尝试了一下,但它不起作用。关于如何在应用程序中添加类的任何想法都可以提供列表或角色,以至于我的控制器中没有全部内容?

谢谢

1 个答案:

答案 0 :(得分:3)

创建一个类:

public class RoleUtility 
{
    private readonly RoleManager<IdentityRole> _roleManager;

    public RoleUtility(RoleManager<IdentityRole> roleManager)
    {
        _roleManager = roleManager;
    }

    public void PopulateRolesList(RegisterViewModel model)
    {
        model.Roles = _roleManager.Roles?.ToList();
    }
}

提取界面:

public interface IRoleUtility
{
    void PopulateRolesList(RegisterViewModel model);
}

RoleUtility类声明变为:

public class RoleUtility: IRoleUtility

然后,在您的Startup类中:

public void ConfigureServices(IServiceCollection services)
{
    ...
    services.AddTransient<IRoleUtility, RoleUtility>();
}

您的控制器代码变为:

public AdminController(
        UserManager<ApplicationUser> userManager,
        ILogger<AccountController> logger,
        IEmailSender emailSender,
        IRoleUtility roleUtility,
        SignInManager<ApplicationUser> signInManager)
    {
        _userManager = userManager;
        _logger = logger;
        _emailSender = emailSender;
        _roleUtility = roleUtility;
        _signInManager = signInManager;
    }

private void PuplateRolesList(RegisterViewModel model)
    {
        _roleUtility.PopulateRolesList(model);
    }