I am a complete newbie in asp.net mvc. And i'm stuck with some problem and don't yet know how to solve it. I googled, found some useful things, but they haven't helped me with solving my problem. So let's begin with what i have now:
public partial class Dish
{
public Dish()
{
PortionFood = new HashSet<PortionFood>();
}
[Key]
public int Id { get; set; }
[Required]
[StringLength(50)]
public string Name { get; set; }
[JsonIgnore]
public virtual DishCategory DishCategory { get; set; }
[JsonIgnore]
public virtual ICollection<PortionFood> PortionFood { get; set; }
}
}
// Food class in a separate file
public partial class Food
{
public Food()
{
PortionFood = new HashSet<PortionFood>();
}
[Key]
public int Id { get; set; }
[Required]
[StringLength(50)]
public string Name { get; set; }
public float Proteins { get; set; }
public float Fat { get; set; }
public float Carbs { get; set; }
public float Ccal { get; set; }
public float? Sugar { get; set; }
public float? AmountOfWater { get; set; }
[ForeignKey("FoodCategory")]
public int IdFoodCategory { get; set; }
[ForeignKey("FoodConsistencyType")]
public int IdFoodConsistencyType { get; set; }
[JsonIgnore]
public virtual FoodCategory FoodCategory { get; set; }
[JsonIgnore]
public virtual ICollection<PortionFood> PortionFood { get; set; }
}
}
// Portion Food Class in a separate file
public partial class PortionFood
{
[Key]
[Column(Order = 0)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
[ForeignKey("Food")]
public int IdFood { get; set; }
[Key]
[Column(Order = 1)]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
[ForeignKey("Dish")]
public int IdDish { get; set; }
public float Amount { get; set; }
public bool IsDeleted { get; set; }
public virtual Dish Dish { get; set; }
public virtual Food Food { get; set; }
}
}
PortionFood just specifies what amount of what Food is inside which Dish. Now i have views for classes Dish and Food, and i am able to add new object of each of these two classes(by filling in the view fields and pressing the button) to DB, i am able to edit an existing Dish && an existing Food. See list of all existing Food && Dish objects.
What i want:
When adding/editing a Dish there must be a possibility to add a PortionFood object releated to current Dish(which we are editing or adding). Just by selecting a FoodId in a dropdown list, setting an amount and clicking the button. The PortionFood object must be inserted to PotionFood collection of related Dish and related Food
How can i implement it?
If there're any uncretainties write in a comment, and i'll try to make it clear.
Thank's for help!
I think I see your problem now, you need to populate from ICollection not to it. In that case I suggest using List<SelectListItem> because you can then use DropDownListFor html helper. For example:
public class ViewModel {
private readonly List<PortionFood> _foods;
[Display(Name = "Pick a portion")]
public int SelectedFoodItem { get; set; }
public IEnumerable<SelectListItem> FoodPortionItems
{
get { return new SelectList(_foods, "Id", "Name"); }
}
}
public class PortionFood {
public int Id { get; set; }
public string Name { get; set; }
}
//In your Razor View:
@Html.LabelFor(m => m.SelectedFoodItem)
@Html.DropDownListFor(m => m.SelectedFoodItem, Model.FoodPortionItems)
That should help you populate the dropdown.
PS: I usually like to use ViewModels instead of Models here, that way you only have what you need in the View
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