CODEWITHSUNDEEP
asp.net-mvchtml.dropdownlistfor
user2915962
user2915962

Reputation: 2711

List of strings to DropDownListFor

This is my model:

public class ContentPage
    {

        public BlogPost BlogPost { get; set; }
        public List<BlogPost> BlogPosts { get; set; }

        public List<string> Kategorier { get; set; }
    }

I would like to use the values in the 

public List<string> Kategorier { get; set; }

In a dropdownlistfor, this is what i got so far:

@Html.DropDownListFor(o => o.BlogPost.Kategori, "Here i want my list i guess?"(o => new SelectListItem { Text = o.Kategori, Value = o.Kategori }), "", null)

To clearify, I want to use the values in the List Kategorier in order to set the value for the o.BlogPost.Kategori Any help appreciated.

Upvotes: 1

Views: 76

Answers (1)

Rune
Rune

Reputation: 8380

There is a number of overloads you can use, but the one I find most readable is

@Html.DropDownListFor(model => model.BlogPost.Kategori, 
                               Model.Kategorier.Select(kat => new SelectListItem { Text = kat, Value = kat })

Part of the reason why I like this overload is just that I prefer strong typing and being helped by the (aspnet) compiler. I generally avoid SelectList and its string-based constructors because they are brittle.

You may want to turn your List<string> into an IEnumerable<SelectListItem> in your view model instead of having to do it in the view.

EDIT:

I would do something like

public class ContentPage
{
    public ContentPage(){} //Default constructor needed for model binding
    public ContentPage(List<string> kategorier /* and possibly more arguments */)
    {
        Kategorier = kategorier.Select(k => new SelectListItem { Text = k, Value = k });
    }

    public BlogPost BlogPost { get; set; }
    public List<BlogPost> BlogPosts { get; set; }

    public IEnumerable<SelectListItem> Kategorier { get; set; }
}

Be aware that this should be fine for creating new blogposts, but if you want to edit existing blog posts, you will have to do a little more work (categories will have to be selected etc. when you render the page initially etc).

Upvotes: 2

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