我正在加载嵌套对象，但传入的数据没有正确关闭json“ [”： 有人可以帮忙，我无法检索数据。

  

[{“ Id”：1，“条形码”：“ N001”，.....，“ ProductSubCategoryID”：1，“ SellerId”：0，“ SellerName”：null，“ ProductSubCategory”：{“ ProductSubCategoryID “：1，” SubCategoryName“：”乳液“，”产品“：[”

public class Product
{
    [Key]
    public int Id { get; set; }
    .
    .
    [ForeignKey("ProductSubCategoryID")]
    public virtual ProductSubCategory ProductSubCategory { get; set; }
}

public class ProductSubCategory
{
    [Key]
    public int ProductSubCategoryID { get; set; }
    [Required]
    [Column(TypeName = "nvarchar(100)")]
    public string SubCategoryName { get; set; }
    public virtual ICollection<Product> Products { get; set; }
}
    // GET: api/Product
    public async Task<Object> GetProducts()
    {
        return Ok(await _context.Products.Include(p => p.ProductSubCategory).ToListAsync());
    }

readonly BaseURI = 'http://localhost:54277/api/Product';

  private   product$: Observable<Product[]>;

  // Get All Products
  getProducts(): Observable<Product[]> {
    if (!this.product$) {
      this.product$ = this.http.get < Product[] > (this.BaseURI + '/GetProducts').pipe(shareReplay());
    }
    return this.product$;
  }