How to Create Dropdown Lists from Enumerations in ASP.NET MVC?

Generating Dropdown Lists from Enumerations in ASP.NET MVC

ASP.NET MVC simplifies the creation of dropdown lists from enumerations using the Html.DropDownList extension method. This guide demonstrates efficient techniques for implementing this functionality.

For MVC versions 5.1 and later, the Html.EnumDropDownListFor method streamlines the process. Simply provide the model property representing the enumeration, a dropdown label, and any desired HTML attributes.

<code class="language-csharp">@Html.EnumDropDownListFor(x => x.YourEnumField, "Select Your Option", new { @class = "form-control" })</code>

For MVC version 5, the EnumHelper class offers a convenient alternative. Use GetSelectList to obtain a SelectList representing the enumeration:

<code class="language-csharp">@Html.DropDownList("MyOption", EnumHelper.GetSelectList(typeof(MyOption)), "Select Your Option", new { @class = "form-control" })</code>

For MVC versions 5 and earlier, a custom extension method (as suggested by Rune Westergren) provides a concise solution:

<code class="language-csharp">namespace MyApp.Common
{
    public static class MyExtensions
    {
        public static SelectList ToSelectList<TEnum>(this TEnum enumObj)
            where TEnum : struct, IComparable, IFormattable, IConvertible
        {
            var values = from TEnum e in Enum.GetValues(typeof(TEnum))
                         select new { Id = e, Name = e.ToString() };
            return new SelectList(values, "Id", "Name", enumObj);
        }
    }
}</code>

This extension method enables a cleaner syntax:

<code class="language-csharp">ViewData["taskStatus"] = task.Status.ToSelectList();</code>

Choose the method most appropriate for your MVC version to efficiently generate dropdown lists from your enumerations.

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