There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key country

19

While binding dropdown in MVC, I always get this error: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key country.

View

@Html.DropDownList("country", (IEnumerable<SelectListItem>)ViewBag.countrydrop,"Select country")

Controller

List<Companyregister> coun = new List<Companyregister>();
coun = ds.getcountry();

List<SelectListItem> item8 = new List<SelectListItem>();
foreach( var c in coun )
{
    item8.Add(new SelectListItem
    {
        Text = c.country,
        Value = c.countryid.ToString()
    });
}

ViewBag.countrydrop = item8;
return View();

I don't know how to resolve it.

This question is tagged with c# asp.net-mvc asp.net-mvc-4

~ Asked on 2014-10-27 10:29:14

The Best Answer is


22

In your action change ViewBag.countrydrop = item8 to ViewBag.country = item8;and in View write like this:

@Html.DropDownList("country",
                   (IEnumerable<SelectListItem>)ViewBag.country,
                   "Select country")

Actually when you write

@Html.DropDownList("country", (IEnumerable)ViewBag.country, "Select country")

or

Html.DropDownList("country","Select Country)

it looks in for IEnumerable<SelectListItem> in ViewBag with key country, you can also use this overload in this case:

@Html.DropDownList("country","Select country") // it will look for ViewBag.country and populates dropdown

See Working DEMO Example

~ Answered on 2014-10-27 10:47:06


17

If you were using DropDownListFor like this:

@Html.DropDownListFor(m => m.SelectedItemId, Model.MySelectList)

where MySelectList in the model was a property of type SelectList, this error could be thrown if the property was null.

Avoid this by simple initializing it in constructor, like this:

public MyModel()
{
    MySelectList = new SelectList(new List<string>()); // empty list of anything...
}

I know it's not the OP's case, but this might help someone like me which had the same error due to this.

~ Answered on 2017-01-25 02:36:20


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