Blazor 和身份

Question

我在 .net core 3.0 中有一个项目，包含 3 个部分：api、共享和 blazor 应用程序。

我在共享项目和一个用户模型中添加了几个模型：

    [Table("user")]
    public class User : IdentityUser<Guid>
    {
        [Required(ErrorMessage = "Firstname is required")]
        [StringLength(32, ErrorMessage = "Firstname must be 32 charaters maximum")]
        [Column("firstname")]
        public string Firstname { get; set; }

        [Required(ErrorMessage = "Lastname is required")]
        [StringLength(32, ErrorMessage = "Lastname must be 32 charaters maximum")]
        [Column("lastname")]
        public string Lastname { get; set; }

        [Required(ErrorMessage = "Thumbnail link is required")]
        [StringLength(512, ErrorMessage = "Thumbnail link must be 512 charaters maximum")]
        [Column("thumbnail_link")]
        public string ThumbnailLink { get; set; }

        [Column("birthday")]
        public DateTime Birthday { get; set; }

        [Required(ErrorMessage = "CreationDate is required")]
        [Column("creation_date")]
        public DateTime CreationDate { get; set; }

        // [Required(ErrorMessage = "User role is required")]
        // [Column("user_role")]
        // public UserRole UserRole { get; set; }

        [Required(ErrorMessage = "Is a banned user is required")]
        [Column("is_banned")]
        public IsBanned IsBanned { get; set; }

        public ICollection<UserRole> UserRoles { get; set; }
        public ICollection<UserProgression> UserProgressions { get; set; }
        public ICollection<Playlist> Playlists { get; set; }
        // public ICollection<Message> MessagesReceived { get; set; }
        // public ICollection<Message> MessagesSended { get; set; }
        public ICollection<Rating> Ratings { get; set; }
        public ICollection<Course> Courses { get; set; }
        public ICollection<SubscriptionHistory> SubscriptionHistories { get; set; }

    }

但是当我运行 blazor 端出现错误时

Cannot find declaration of exported type 'System.Threading.Semaphore' from the assembly 'System.Threading, Version=4.0.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
  Fatal error in IL Linker

  Unhandled Exception: Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'C:\Users\sebastien\.nuget\packages\system.buffers.5.0\lib\netstandard2.0\System.Bufers.dll, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' ---> Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'C:\Users\sebastien\.nuget\packages\system.buffers.5.0\lib\netstandard2.0\System.Bufers.dll, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
     at Mono.Linker.DirectoryAssemblyResolver.Resolve(AssemblyNameReference name, ReaderParameters parameters)
     at Mono.Linker.AssemblyResolver.Resolve(AssemblyNameReference
name, ReaderParameters parameters)
     at Mono.Linker.LinkContext.Resolve(IMetadataScope scope)
     --- End of inner exception stack trace ---
     at Mono.Linker.LinkContext.Resolve(IMetadataScope scope)
     at Mono.Linker.Steps.ResolveFromAssemblyStep.Process()
     at Mono.Linker.Steps.BaseStep.Process(LinkContext context)
     at Mono.Linker.Pipeline.ProcessStep(LinkContext context, IStep step)
     at Mono.Linker.Pipeline.Process(LinkContext context)
     at Mono.Linker.Driver.Run(ILogger customLogger)
     at Mono.Linker.Driver.Execute(String[] args, ILogger customLogger)
     at Mono.Linker.Driver.Main(String[] args)

所以用户继承自 IdentityUser，它是 :

的一部分

PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="2.2.0"

我发现 blazor 不支持带有 entity framework 的包。

那么我该如何实现 Identity 呢？如何在我的服务器端和前端之间共享我的模型？我是初学者，很难找到有关该主题的一些信息。

欢迎各种帮助！

谢谢

Answer 1

遗憾的是，您无法与 Blazor 应用程序共享 IdentityUser 模型。 .Net 标准 2.0 上的 Blazor 客户端运行，Asp.net 核心上的身份资产运行。您可以在 asp.net 核心端使用 .net 标准代码，但反之则不行。

要解决这个问题，请将您的 IdentityUser 模型移动到服务器，并在您的共享项目中创建一个 "transfer model"，其中包含您要向下传输到客户端的属性，然后从中复制每个属性实际的 AspNetUsers table 行。无论如何，您想要完全控制用户能够看到的有关 AspNetUsers table 的内容。希望这可以帮助！

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