如何在 .net core 模型中访问当前用户和数据库上下文

Question

I have a model with a method and I want to get the current UserID and have access to the database context.

public class Annonce
{
    public int ID { get; set; }
    
    ...

    public bool AnnonceDansFavoris(UserManager<ApplicationUser> UserManager)
    {
        // Recherche du user ID courant
        string userID = UserManager.GetUserId(ClaimTypes.NameIdentifier);

        var _context = (PatrimoineClickDbContext)ValidationContext.GetService(typeof(ApplicationDbContext));

        
        return (_context.Favoris.Any(f => (f.CreePar == userID) && (f.AnnonceID == ID)));
    }
}   

But it doesn't work :(

Can you tell me how I can do this.

Thanks

Here's my error messages

I can't have access to the User property of the HttpContext Class

I can't access to ValidationContext.GetService

Answer 1

I think you were passing wrong parameter: To Get UserId you could try:

var principle = HttpContext.User;
            
string userID = UserManager.GetUserId(principle);

To get context in your custom ValidationAttribute:

var _context = (ApplicationDbContext)ValidationContext.GetService(typeof(ApplicationDbContext));

I think it may help if you could describe your purpose more clearly and share more codes related