Asp.net身份自定义验证



Asp.net Identity不允许两个或多个用户使用相同的用户名,即使AspNetUsers表中的主键是Id,所以我试图验证UserManager的UserValidator,但它仍然给我错误,我不能给两个用户相同的用户名。这里是自定义验证器:

public class CustomUserValidator<TUser> : IIdentityValidator<TUser>
 where TUser : ApplicationUser, Microsoft.AspNet.Identity.IUser
{
    private readonly UserManager<TUser> _manager;
    public CustomUserValidator()
    {
    }
    public CustomUserValidator(UserManager<TUser> manager)
    {
        _manager = manager;
    }
    public async Task<IdentityResult> ValidateAsync(TUser item)
    {
        var errors = new List<string>();

        if (_manager != null)
        {
            var otherAccount = await _manager.FindByNameAsync(item.UserName);
            if (otherAccount != null && otherAccount.CodeClient == item.CodeClient)
                errors.Add("Utilisateur existant.");
        }
        return errors.Any()
            ? IdentityResult.Failed(errors.ToArray())
            : IdentityResult.Success;
    }
}

在我的控制器的构造函数中,我更改uservalidator属性,如下所示:

public UsersRootController(UserManager<ApplicationUser> userManager, RoleManager<IdentityRole> roleManager)
    {
        UserManager = userManager;
        RoleManager = RoleManager;
        UserManager.UserValidator = new CustomUserValidator<ApplicationUser>(userManager);
    }

当我尝试调用createasync方法时:

  var user = new ApplicationUser() { UserName = model.UserName, Email = model.Email, Nom = model.Nom, Prenom = model.Prenom, IsEnabled = model.IsEnabled, CodeClient = model.Client };
   resultUser = await UserManager.CreateAsync(user, model.Password);

它使用我的自定义验证器,但总是返回false。

有什么办法解决这个问题吗?

我遇到了同样的问题,但使用了Role

问题是微软反对验证的策略!他通过IIdentityValidatorIdentityDbContext内部检查唯一性。为什么两次?我不知道!要解决此问题,请查看源代码(此处:https://aspnetidentity.codeplex.com/SourceControl/latest#src/Microsoft.AspNet.Identity.EntityFramework/IdentityDbContext.cs)就像我为Role:做的那样简单地覆盖它

public class ApplicationIdentityDbContext : IdentityDbContext<...>
{
    protected override System.Data.Entity.Validation.DbEntityValidationResult ValidateEntity(System.Data.Entity.Infrastructure.DbEntityEntry entityEntry, IDictionary<object, object> items)
    {
        if (entityEntry != null && entityEntry.State == EntityState.Added)
        {
            //NOTE : change the following codes to support your needs!
            var role = entityEntry.Entity as ApplicationRole;
            if (role != null)
            {
                var errors = new List<DbValidationError>();
                return new DbEntityValidationResult(entityEntry, errors);
            }
        }
        return base.ValidateEntity(entityEntry, items);
    }
}

之后,您应该强制Store使用这个新上下文。

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