Asp.Net MVC DropDownList issue

Question

I am trying to display dropdown in my asp.net mvc application.I got strucked on setting the list items in Priorities. What would be my mistake here?

public IList<SelectListItem> Priorities { get; set; }
Priorities = new List<SelectListItem>();
Priorities.Add(new IList<SelectListItem>
                {
                    new SelectListItem { Text = "High", Value = "1"},
                    new SelectListItem { Text = "Low", Value = "0"}
                });

@Html.DropDownListFor(m => m.SelectedPriority, Model.Priorities, "Select one")

Change Priorities.Add(new IList<SelectListItem> {.. to Priorities.Add(new SelectListItem { Text = "High", Value="1" }); — user3559349
– user3559349, Commented Nov 25, 2014 at 22:41

Mate · Accepted Answer · 2014-11-25 23:05:08Z

1

Try changing

Priorities = new List<SelectListItem>();

By

Priorities = new List<SelectListItem>() {
                new SelectListItem { Text = "High", Value = "1"},
                new SelectListItem { Text = "Low", Value = "0"}
            };

Or Cast and AddRange

 ((List<SelectListItem>)Priorities).AddRange(
                new List<SelectListItem>() {
                    new SelectListItem { Text = "High", Value = "1"},
                    new SelectListItem { Text = "Low", Value = "0"}
                }

            );

Other option using IEnumerable :

public IEnumerable<SelectListItem> Priorities { get; set; }
Priorities = new List<SelectListItem>();

Priorities = Priorities.Concat(new List<SelectListItem>() {
                new SelectListItem { Text = "High", Value = "1"},
                new SelectListItem { Text = "Low", Value = "0"}
                }
        );

edited Nov 25, 2014 at 23:05

answered Nov 25, 2014 at 22:51

Mate

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Comments

Thomas Taylor · Accepted Answer · 2014-11-25 23:14:23Z

1

You can't instantiate an interface here:

Priorities.Add(new IList<SelectListItem>
{
    new SelectListItem { Text = "High", Value = "1"},
    new SelectListItem { Text = "Low", Value = "0"}
});

Instead try to instantiate it as something that implements IList and use AddRangewhich is meant for this kind of situation:

Priorities.AddRange(new List<SelectListItem>
{
  new SelectListItem { Text = "High", Value = "1"},
  new SelectListItem { Text = "Low", Value = "0"}
});

answered Nov 25, 2014 at 23:14

Thomas Taylor

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