CODEWITHSUNDEEP
c#asp.net-mvc
user2471435
user2471435

Reputation: 1674

Issues Populating MVC Html.DropDownList

I am trying to poulate a DropDownList with the contents of a Dictionary which is like this:

public static readonly IDictionary<string, string> VideoProviderDictionary = new Dictionary<string, string>
                {
                {"1", "Atlantic"},
                {"2", "Blue Ridge"},
                ...

For the model I have:

public string[] VideoProvider { get; set; }
            public IEnumerable<SelectListItem> Items { get; set; }

In the controller, I am trying to populate the list:

 [HttpGet]
       public ActionResult Register()
       {
            var model = new RegisterViewModel();
            model.Items = new SelectList(VideoProviders.VideoProviderDictionary);

           return View(model);
       }

The issue is in the markup, there is no overload for DropDownList that takes a lambda expression:

 @Html.DropDownList(Model -> model.Items)

I tried to use:

 @Html.DropDownListFor(model => model.Items)

But I get the error:

CS1501: No overload for method 'DropDownListFor' takes 1 arguments

Upvotes: 1

Views: 542

Answers (2)

Kartikeya Khosla
Kartikeya Khosla

Reputation: 18873

Controller :

[HttpGet]
   public ActionResult Register()
   {
        var model = new RegisterViewModel();
        Viewbag.Items = new SelectList(VideoProviders.VideoProviderDictionary);
        ......
        ......
        return View(model);
   }

View :

@Html.DropDownList("VideoProvider",Viewbag.Items as SelectList)

OR For strongly typed dropdownlist do this :

@Html.DropDownListFor(model=>model.VideoProvider,Viewbag.Items as SelectList)

Model:

public string VideoProvider { get; set; }   //Correct here
public IEnumerable<SelectListItem> Items { get; set; }  //if you are using Viewbag to bind dropdownlist(which is a easiest and effective way in MVC) then you don't need any model property for dropdown,you can remove this property.

Upvotes: 0

romanoza
romanoza

Reputation: 4862

In your case -

Model:

public class RegisterViewModel
{

    public static readonly IDictionary<string, string> VideoProviderDictionary = new Dictionary<string, string>
            {{"1", "Atlantic"},
            {"2", "Blue Ridge"}};

    public string VideoProvider { get; set; }
    public IEnumerable<SelectListItem> Items { get; set; }
}

Controller:

    [HttpGet]
    public ActionResult Register() {
        var model = new RegisterViewModel();
        model.Items = new SelectList(RegisterViewModel.VideoProviderDictionary, "key", "value");
        return View(model);
    }

View:

    @Html.DropDownListFor(model => model.VideoProvider, Model.Items)

Upvotes: 2

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