如何在迁移配置文件中获取和使用 AspnetUsers UserId？

Question

这是entity framework迁移的配置文件（种子方法）的代码。 通过这段代码，我为 AspnetUsers table 创建了一个用户和角色，并将该用户置于名为 Admin 的角色中。

AppUserManager userMgr = new AppUserManager(new UserStore<AppUser>(context));
        AppRoleManager roleMgr = new AppRoleManager(new RoleStore<AppRole>(context));
        string roleName = "Admin";
        string userName = "admin@educationboard.com";
        string password = "Sifre";
        string email = "admin@educationboard.com";
        if (!roleMgr.RoleExists(roleName))
        {
            roleMgr.Create(new AppRole(roleName));
        }
        AppUser user = userMgr.FindByName(userName);
        if (user == null)
        {
            userMgr.Create(new AppUser { UserName = userName, Email = email },
            password);
            user = userMgr.FindByName(userName);
        }
        if (!userMgr.IsInRole(user.Id, roleName))
        {
            userMgr.AddToRole(user.Id, roleName);
        }
        foreach (AppUser dbUser in userMgr.Users)
        {
            dbUser.Cinsiyet = eCinsiyetler.Erkek;
        }
        context.SaveChanges();

然后我还创建了一个名为 Articles 的实体，每篇文章都有一个作者 ID。我在 Article 实体中将 AuthorId 命名为 UserId。我怎样才能在下面的代码中获取和使用我刚刚在上面创建的 UserId？

var articles= new List<Article>
        {
            new Article{Title="Title 1", AddedDate=DateTime.Now,  Content="content here.",  UserId=.(What code should be here? }; 
articles.ForEach(p => context.Articles.AddOrUpdate(s => s.Title, p));
        context.SaveChanges();

Answer 1

为什么不能像上面那样查询用户？

AppUser user = userMgr.FindByName(userName);
        if (user == null)
        {
            userMgr.Create(new AppUser { UserName = userName, Email = email },
            password);
            user = userMgr.FindByName(userName);
        }

然后有user.Id?

如果您在 ApplicationDbContext 中有句柄，您可以轻松地执行类似

的操作

ApplicationDbContext db = new ApplicationDbContext();
var user = db.AspNetUser.Single(x => x.UserName == username);
var id = user.Id;