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I have a nullable enum defined for a person title and used in a person model.
public enum Titles { Mr=0, Mrs=1, Miss=2, Dr=3 }
[Required(ErrorMessage="Please supply the title.")]
[Display(Name = "Title")]
public Titles Title { get; set; }
When I add this property into a create or edit view using the HTML Helper
@Html.EnumDropDownListFor(model => model.Title)
the control renders as expected with the enum values within it.
However, when I choose to edit an existing person, the title enum doesn't show the current title. It shows an empty entry at the top of the DropDownList.
However, if I remove the nullable, it always shows the first item in the enum.
Any ideas how I get the DropDownList to display the correctly chosen enum item for the person I am editing?
Many thanks,
Jason.
283
Create an enum, ActionType, under the Models folder as in the following code snippet. I populate the DropDownList using a SelectListItem type list. So we need to first create a list from enum and thereafter that list binds with the DropDownListFor method of the HTML Helper class on the view.
An enum is a special "class" that represents a group of constants (unchangeable/read-only variables).
Binding MVC DropDownList with Static Values Just add an Html helper for DropDownList and provide a static list of SelectListItem. The values added as SelectListItem will be added and displayed in the DropDownList. In this way, you do not need to add anything to Controller Action.
I just made a simple test.
You mentioned that you have a nullable Enum, but for that you need public Titles? Title { get; set; }
and using this Model:
public class TestViewModel
{
[System.ComponentModel.DataAnnotations.Required(ErrorMessage = "Please supply the title.")]
[System.ComponentModel.DataAnnotations.Display(Name = "Title")]
public Title? Title { get; set; }
}
public enum Title
{
Mr = 0,
Mrs = 1,
Miss = 2,
Dr = 3
}
with this ActionResult
public ActionResult Test()
{
var model = new List<Models.TestViewModel>();
model.Add(new TestViewModel() { Title = Title.Miss });
model.Add(new TestViewModel() { Title = Title.Mrs });
model.Add(new TestViewModel() { Title = null });
return View(model);
}
and using a simple HTML
@model List<Models.TestViewModel>
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head><title>Test</title></head>
<body>
@for (int i = 1; i <= Model.Count; i++)
{
var title = Model[i-1];
<div>
<h2>Model @i</h2>
@Html.LabelFor(x => title.Title)
@Html.EnumDropDownListFor(x => title.Title)
@Html.EditorFor(x => title.Title)
</div>
}
</body>
</html>
I get this as result:
Which is exactly what to expect... are you missing something from my example?
186
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