c# - How to get the values of an enum into a SelectList

Question

Imagine I have an enumeration such as this (just as an example):

public enum Direction{
    Horizontal = 0,
    Vertical = 1,
    Diagonal = 2
}

How can I write a routine to get these values into a System.Web.Mvc.SelectList, given that the contents of the enumeration are subject to change in future? I want to get each enumerations name as the option text, and its value as the value text, like this:

<select>
    <option value="0">Horizontal</option>
    <option value="1">Vertical</option>
    <option value="2">Diagonal</option>
</select>

This is the best I can come up with so far:

 public static SelectList GetDirectionSelectList()
 {
    Array values = Enum.GetValues(typeof(Direction));
    List<ListItem> items = new List<ListItem>(values.Length);

    foreach (var i in values)
    {
        items.Add(new ListItem
        {
            Text = Enum.GetName(typeof(Direction), i),
            Value = i.ToString()
        });
    }

    return new SelectList(items);
 }

However this always renders the option text as 'System.Web.Mvc.ListItem'. Debugging through this also shows me that Enum.GetValues() is returning 'Horizontal, Vertical' etc. instead of 0, 1 as I would've expected, which makes me wonder what the difference is between Enum.GetName() and Enum.GetValue().

Answer 1

It's been awhile since I've had to do this, but I think this should work.

var directions = from Direction d in Enum.GetValues(typeof(Direction))
           select new { ID = (int)d, Name = d.ToString() };
return new SelectList(directions , "ID", "Name", someSelectedValue);