asp.net-mvc - 添加默认的 SelectListItem

Question

 public IEnumerable<SelectListItem> GetList(int? ID)
 {
      return from s in db.List
             orderby s.Descript
             select new SelectListItem
             {
                 Text = s.Descript,
                 Value = s.ID.ToString(),
                 Selected = (s.ID == ID)
             };
 }

我将上述返回到 View 并填充 DropDownList .我想添加一个默认值 SelectListItem (0, "Please Select..")在返回到 View 之前到上面的 linq 结果。这可能吗？

Answer 1

return new[] { new SelectListItem { Text = ... } }.Concat(
       from s in db.List
       orderby s.Descript
       select new SelectListItem
       {
           Text = s.Descript,
           Value = s.ID.ToString(),
           Selected = (s.ID == ID)
       });