C# MVC 5 - Create a SelectList For Dates Doesn't Work

Question

Im trying to create a SelectList for Dates, in format MMMM/yyyy, in the TEXT property and yyyy-MM-dd in the VALUE property.

Everything works good, but when I use this SelectList in a edit option and I have to fill the form to edit, the SELECTED property doesn't work and I don't know why...

My method to create the list is:

public SelectList GetSLDate(DateTime _dateLimit, DateTime? _selected = null)
{
    var list = new List<SelectItemList>();
    var date = new DateTime(2015, 1, 1);

    int month = Math.Abs(12 * (_dateLimit.Year - date.Year) + (_dateLimit.Month - date.Month + 1));

    for (int m = (month - 1); m >= 0; m--)
    {
        var dateRef = date.AddMonths(m);

        list.Add(
            new SelectListItem
            {
                Text = dateRef.ToString("MMMM/yyyy"),
                Value = dateRef.ToString("yyyy-MM-dd")
            }
        );

        return new SelectList(list, "Value", "Text", ((_selected == null) ? null : (((DateTime)_selected).ToString("yyyy-MM-dd"))));
    }
}

Answer 1

When you create your SelectListItem, try setting the Selected property:

        new SelectListItem
        {
            Text = dateRef.ToString("MMMM/yyyy"),
            Value = dateRef.ToString("yyyy-MM-dd"),
            Selected = _selected == dateRef
        }