ASP.NET Core 2.2 在 DbContext 中获取 userId

Question

我对 ASP.NET Core 还很陌生。我想创建 ASP.NET Core 2.2 WebAPI，具有 Entity Framework Core 和 ASP.NET Identity。另外，我想使用 JWT 通过令牌来保护对 WebAPI 的访问。

我已成功将用户插入数据库并从我的 API 取回令牌，并且令牌身份验证正在运行。

但是，我还想软删除数据库记录并跟踪谁拥有 deleted/updated/added 记录。测试 table 是国家，其中字段只有 Title 和 Description.

到目前为止，我已经颠倒了互联网，但没有帮助:(

我试过的最后一件事是（userId 是 null）：

在startup.cs:

services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

在我的 AppDbContext.cs

public class AppDbContext : IdentityDbContext<AppUser>{

    public AppDbContext(DbContextOptions options) : base(options)
    {
    }

    public DbSet<AppUser> AppUsers { get; set; }

    public DbSet<Country> Countries { get; set; } // just for testing

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);

        // TODO - IGNORE THIS
        //builder.Entity<AppUser>().Property<bool>("IsDeleted");
        //builder.Entity<AppUser>().HasQueryFilter(m => EF.Property<bool>(m, "IsDeleted") == false);
    }

    public override async Task<int> SaveChangesAsync(CancellationToken cancellationToken = default(CancellationToken))
    {
        CheckBeforeSaving();
        return (await base.SaveChangesAsync(true, cancellationToken).ConfigureAwait(false));
    }

    private void CheckBeforeSaving()
    {
        var httpContextAccessor = this.GetService<IHttpContextAccessor>();
        var userId = httpContextAccessor?.HttpContext.User.FindFirstValue(ClaimTypes.NameIdentifier);

        foreach (var entry in ChangeTracker.Entries())
        {
            switch (entry.State)
            {
                case EntityState.Detached:
                    break;
                case EntityState.Unchanged:
                    break;
                case EntityState.Deleted:
                    entry.State = EntityState.Modified;
                    entry.CurrentValues["IsDeleted"] = true;
                    entry.CurrentValues["DeletedBy"] = userId;
                    entry.CurrentValues["Deleted"] = DateTime.Now;
                    break;
                case EntityState.Modified:
                    entry.CurrentValues["UpdatedBy"] = userId;
                    entry.CurrentValues["Updated"] = DateTime.Now;
                    break;
                case EntityState.Added:
                    entry.CurrentValues["IsDeleted"] = false;
                    entry.CurrentValues["CreatedBy"] = userId;
                    entry.CurrentValues["Created"] = DateTime.Now;
                    entry.CurrentValues["Description"] = userId;
                    break;
                default:
                    break;
            }
        }
    }}}

Answer 1

这是我在 .net core 2.2 中获取用户 ID 的方式

首先您需要在 Startup.cs

中注册

services.AddSingleton<IActionContextAccessor, ActionContextAccessor>();

然后为您服务

private readonly IHttpContextAccessor _httpContextAccessor;

public UserService(
    IHttpContextAccessor httpContextAccessor)
{

}

var currentUserGuid = _httpContextAccessor?.HttpContext?.User?.FindFirst(UserClaimsKey.Sub)?.Value;

Answer 2

尝试将 IHttpContextAccessor 直接注入 ApplicationDbContext:

public class ApplicationDbContext : IdentityDbContext<AppUser>
{
    private readonly IHttpContextAccessor _httpContextAccessor;
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options, IHttpContextAccessor httpContextAccessor)
        : base(options)
    {
        _httpContextAccessor= httpContextAccessor;
    }

    //other methods

   private void CheckBeforeSaving()
   {        
     var userId = _httpContextAccessor?.HttpContext.User.FindFirstValue(ClaimTypes.NameIdentifier);
     //...
   }
}

Answer 3

private async Task<ApplicationUser> GetUserDetailsAnsyc()
{
  return await userManager.GetUserAnsync(HttpContext.User);
}

var user = await GetUserDetailsAnsyc();
Console.WriteLine(user.Id.ToString());

ASP.NET Core 2.2 在 DbContext 中获取 userId

ASP.NET Core 2.2 get userId in DbContext

c#

entity-framework

asp.net-identity

entity-framework-core

asp.net-core