如何在 ASP.NET Core 2.2 中创建角色并将其分配给用户

Question

我正在使用 asp.net 核心 2.2 默认网站模板和选择作为个人用户帐户的身份验证。我如何创建 "Admin" 角色并将其分配给用户，以便我可以在控制器中使用角色来过滤访问并让他们看到不同的页面。这是我到目前为止在互联网上找到的内容，但它不起作用，因为它说：ApplicationUser could not be found

private void CreateRoles(IServiceProvider serviceProvider)
        {

            var roleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
            var userManager = serviceProvider.GetRequiredService<UserManager<ApplicationUser>>();
            Task<IdentityResult> roleResult;
            string email = "someone@somewhere.com";

            //Check that there is an Administrator role and create if not
            Task<bool> hasAdminRole = roleManager.RoleExistsAsync("Administrator");
            hasAdminRole.Wait();

            if (!hasAdminRole.Result)
            {
                roleResult = roleManager.CreateAsync(new IdentityRole("Administrator"));
                roleResult.Wait();
            }

            //Check if the admin user exists and create it if not
            //Add to the Administrator role

            Task<ApplicationUser> testUser = userManager.FindByEmailAsync(email);
            testUser.Wait();

            if (testUser.Result == null)
            {
                ApplicationUser administrator = new ApplicationUser();
                administrator.Email = email;
                administrator.UserName = email;

                Task<IdentityResult> newUser = userManager.CreateAsync(administrator, "_AStrongP@ssword!");
                newUser.Wait();

                if (newUser.Result.Succeeded)
                {
                    Task<IdentityResult> newUserRole = userManager.AddToRoleAsync(administrator, "Administrator");
                    newUserRole.Wait();
                }
            }

        }

任何帮助我的应用程序的管理员都将不胜感激。

Answer 1

第一步是创建可用于扩展声明的 ApplicationUser class :

public class ApplicationUser : IdentityUser
{

}

修改 _LoginPartial.cshtml 以使用 class :

@inject SignInManager<ApplicationUser> SignInManager
@inject UserManager<ApplicationUser> UserManager

修改Data文件夹中的ApplicationDbContext.cs分配给ApplicationUser和IdentityRole:

public class ApplicationDbContext : IdentityDbContext<ApplicationUser, IdentityRole, string>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}

修改 Startup.cs 以启用新的 ApplicationUser 和角色管理：

services.AddDefaultIdentity<ApplicationUser>()
    .AddRoles<IdentityRole>()
    .AddDefaultUI(UIFramework.Bootstrap4)
    .AddEntityFrameworkStores<ApplicationDbContext>();

之后，您可以播种以创建角色并分配给用户，例如：

private async Task CreateUserRoles(IServiceProvider serviceProvider)
{
    var RoleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
    var UserManager = serviceProvider.GetRequiredService<UserManager<ApplicationUser>>();

    IdentityResult roleResult;
    //Adding Admin Role
    var roleCheck = await RoleManager.RoleExistsAsync("Admin");
    if (!roleCheck)
    {
        //create the roles and seed them to the database
        roleResult = await RoleManager.CreateAsync(new IdentityRole("Admin"));
    }
    //Assign Admin role to the main User here we have given our newly registered 
    //login id for Admin management
    ApplicationUser user = await UserManager.FindByEmailAsync("v-nany@hotmail.com");
    await UserManager.AddToRoleAsync(user, "Admin");
}

使用：

public void Configure(IApplicationBuilder app, IHostingEnvironment env,IServiceProvider serviceProvider)
{
    .......

    app.UseAuthentication();

    app.UseMvc(routes =>
    {
        routes.MapRoute(
            name: "default",
            template: "{controller=Home}/{action=Index}/{id?}");
    });

    CreateUserRoles(serviceProvider).Wait();
}

如何在 ASP.NET Core 2.2 中创建角色并将其分配给用户

How to create roles in ASP.NET Core 2.2 and assign them to users

c#

asp.net

asp.net-identity

asp.net-core

asp.net-core-2.2