Question

这是实体框架迁移的配置文件（种子方法）的代码。通过此代码，我为AspnetUsers表创建了一个用户和角色，并将用户置于名为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。我怎样才能获得并使用我刚刚在下面的代码中创建的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，则可以轻松执行类似

的操作

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

如何在迁移配置文件中获取和使用AspnetUsers UserId？

1 个答案: