@{
    var list = new SelectList(new List<SelectListItem>());
    var htmlClass = "form-control select search";
    if (!string.IsNullOrEmpty(ViewData.ModelMetadata.TemplateHint))
    {
        htmlClass += " " + ViewData.ModelMetadata.TemplateHint;
    }
    if (ViewData.ModelMetadata.IsEnum)
    {
        if (ViewData.ModelMetadata.IsNullableValueType)
        {
            var enumType = ViewData.ModelMetadata.ModelType.GetGenericArguments()[0];
            var items = enumType.GetEnumValues().Cast<object>()
                .Select(o => new SelectListItem { Value = o.ToString(), Text = (Enum.Parse(enumType, o.ToString()) as Enum).GetDisplayName() })
                .ToList();
            list = new SelectList(items, "Value", "Text", Model);
            @Html.DropDownList("", list, "选择", new { @class = htmlClass })
        }
        else
        {
            list = (Model as Enum).GetSelectList();
            @Html.DropDownList("", list, new { @class = htmlClass })
        }
    }
    else
    {
        list = (ViewData[ViewData.ModelMetadata.PropertyName + "SelectList"] as SelectList) ?? new SelectList(new List<SelectListItem>());
        @Html.DropDownList("", list, "选择", new { @class = htmlClass })
    }
}