解决方法
因为用户不能以正常方式在Identity中播种,就像其他表使用.NET Core 2.1的.HasData()播种一样.
.NET Core 2.1中的种子角色使用ApplicationDbContext类中给出的代码：
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
// Customize the ASP.NET Identity model and override the defaults if needed.
// For example,you can rename the ASP.NET Identity table names and more.
// Add your customizations after calling base.OnModelCreating(builder);
modelBuilder.Entity<IdentityRole>().HasData(new IdentityRole { Name = "Admin",NormalizedName = "Admin".ToUpper() });
}
具有角色的种子用户按照以下步骤操作.
第1步：创建新类
public static class ApplicationDbInitializer
{
public static void SeedUsers(UserManager<IdentityUser> userManager)
{
if (userManager.FindByEmailAsync("abc@xyz.com").Result==null)
{
IdentityUser user = new IdentityUser
{
UserName = "abc@xyz.com",Email = "abc@xyz.com"
};
IdentityResult result = userManager.CreateAsync(user,"PasswordHere").Result;
if (result.Succeeded)
{
userManager.AddToRoleAsync(user,"Admin").Wait();
}
}
}
}
步骤2：现在修改Startup.cs类中的ConfigureServices方法.
修改前：
services.AddDefaultIdentity<IdentityUser>()
.AddEntityFrameworkStores<ApplicationDbContext>();
修改后：
services.AddDefaultIdentity<IdentityUser>().AddRoles<IdentityRole>()
.AddEntityFrameworkStores<ApplicationDbContext>();
步骤3：修改Startup.cs类中Configure Method的参数.
修改前：
public void Configure(IApplicationBuilder app,IHostingEnvironment env)
{
//..........
}
修改后：
public void Configure(IApplicationBuilder app,IHostingEnvironment env,UserManager<IdentityUser> userManager)
{
//..........
}
第4步：调用Seed(ApplicationDbInitializer)类的方法：
ApplicationDbInitializer.SeedUsers(userManager);
