如何从ASP.NET MVC中的枚举创建下拉列表？

Question

我正在尝试使用Html.DropDownList扩展方法,但无法弄清楚如何将它与枚举一起使用.

我的课程 :

namespace Support_A_Tree.Models
{
    public enum Countries
    {
        Belgium,
        Netherlands,
        France,
        United_Kingdom,
        Other
    }


    [MetadataType(typeof(SupporterMetaData))]
    public partial class Person
    {
        public string Name { get; set; }
        public Countries Country { get; set; }

        public List<SelectListItem> allCountries()
        {
            List<SelectListItem> choices = new List<SelectListItem>();
            foreach (String c in Enum.GetValues(typeof(Countries)))
            {
                choices.Add(new SelectListItem() { Text = c , Value = bool.TrueString });
            }
            return choices;
        }


    }

    public class SupporterMetaData
    {
        public string Name { get; set; }

        [Required]
        public Countries Country { get; set; }
    }
}

在我的视图中,我试图获得所有国家,但似乎我做错了.

@using (Html.BeginForm())
{
    <div>
        <p style = "color: red;">@ViewBag.Message</p>
    </div>

    <div>
        <h2> You want to ... </h2>
        <p>Plant trees</p>
        @Html.CheckBoxSimple("support", new { @value = "Plant trees" })

        <p>Support us financial</p>
        @Html.CheckBoxSimple("support", new { @value = "Support financial" })
    </div>

    <input type="submit" value="Continue ">
}

Answer 1

在您的视图中,您可以使用SelectExtensions.EnumDropDownListFor:

例如:

@Html.EnumDropDownListFor(model => model.Countries)

鉴于@model该视图的具有指定属性Countries是一个enum类型.

如果要在下拉列表中显示默认文本(例如:"选择国家/地区").看看下面的问题和答案.

Html.EnumDropdownListFor:显示默认文本