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I am new to ASP.net MVC and am using a viewmodel rather than viewbags to populate my dropdowns since I've seen most people recommend against them. I have a slick UI that does cascading dropdowns and autocompletes (not shown here) but I can't seem to get my data saved back to the database. Models: public partial class Car { public int CarID { get; set; } public string CarName { get; set; } public int ModelID { get; set; } public int ManufacturerID { get; set; } public int CarColorID { get; set; } public Nullable<decimal> Price { get; set; } public string Description { get; set; } public virtual CarColor CarColor { get; set; } public virtual Manufacturer Manufacturer { get; set; } public virtual CarModel CarModel { get; set; } } public partial class CarColor { public CarColor() { this.Cars = new HashSet<Car>(); } public int ColorID { get; set; } public string ColorName { get; set; } public virtual ICollection<Car> Cars { get; set; } } public partial class CarModel { public CarModel() { this.Cars = new HashSet<Car>(); } public int CarModelID { get; set; } public int ManufacturerID { get; set; } public string CarModelName { get; set; } public virtual ICollection<Car> Cars { get; set; } public virtual Manufacturer Manufacturer { get; set; } } public partial class Manufacturer { public Manufacturer() { this.Cars = new HashSet<Car>(); this.Manufacturer1 = new HashSet<Manufacturer>(); this.CarModels = new HashSet<CarModel>(); } public int ManufacturerID { get; set; } public string ManufacturerName { get; set; } public Nullable<int> ParentID { get; set; }

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