[英]Generating Roles in Startup.cs doesn't work anymore in .NET Core 2.0
//Creates the admin ROLE
new RoleSeed(app.ApplicationServices.GetService<RoleManager<IdentityRole>>()).Seed().GetAwaiter().GetResult();
//Creates the admin ACCOUNT
new AccountSeed(app.ApplicationServices.GetService<UserManager<ApplicationUser>>()).Seed().GetAwaiter().GetResult();
//Adding ACCOUNT to ROLE
new AccToRoleSeed(app.ApplicationServices.GetService<UserManager<ApplicationUser>>(),
app.ApplicationServices.GetService<ApplicationDbContext>()).Seed().GetAwaiter().GetResult();
This piece of code generates an Admin role, account and finally adds that account to the admin role. 这段代码生成管理员角色,帐户,最后将该帐户添加到管理员角色。 This used to work before I upgraded to 2.0.0
这曾经在我升级到2.0.0之前工作
Now I get this error: 现在我收到这个错误:
System.InvalidOperationException occurred HResult=0x80131509
发生System.InvalidOperationException HResult = 0x80131509
Message= Cannot resolve scoped service 'Microsoft.AspNetCore.Identity.RoleManager`1[Microsoft.AspNetCore.Identity.IdentityRole]' from root provider.Message = 无法从根提供程序解析作用域服务'Microsoft.AspNetCore.Identity.RoleManager`1 [Microsoft.AspNetCore.Identity.IdentityRole]'。
How can this be done in this version? 如何在这个版本中完成? Thanks!
谢谢!
SOLUTION 解
The new 2.0 Program.cs default one liner doesn't include doing this, however, the explicit way still works: 新的2.0 Program.cs默认一个衬垫不包括这样做,但是,显式方式仍然有效:
public class Program
{
public static void Main(string[] args)
{
var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>()
.Build();
host.Run();
}
}
Also, not checking if the Role exists before creating is not forgiven anymore :D 此外,在创建之前不检查角色是否存在不再被原谅:D
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