DropdownList的处理总结

创建一：

List<SelectListItem> items = new List<SelectListItem>()

{

	new SelectListItem(){Text="Text1",Value="Value1",Selected=false},

	new SelectListItem(){Text="Text2",Value="Value2",Selected=true},

	new SelectListItem(){Text="Text3",Value="Value3",Selected=false},

	new SelectListItem(){Text="Text4",Value="Value4",Selected=false}

};

ViewData["Categories"] = items;

前台：

@Html.DropDownListFor(model => model.ClassId, ViewData["Categories"] as List<SelectListItem>"请选择")

创建二：

List<Models.T_CMS_Class> list = db.T_CMS_Class.ToList();

SelectList items = new SelectList(list, "ClassId", "ClassName");

ViewBag.ClassId = items;

前台：

@Html.DropDownListFor(model => model.ClassId, ViewBag.ClassId as SelectList, "请选择")

@Html.ListBoxFor(model => model.ClassId, ViewBag.ClassId as List<SelectListItem>"请选择")

创建三：

List<SelectListItem> items = new List<SelectListItem>();

items.Add(new SelectListItem() { Text = "001", Value = "1", Selected = false });

items.Add(new SelectListItem() {Text = "002", Value = "2", Selected = false });

ViewData["Categories"] = items;

前台：

@Html.DropDownListFor(model => model.ClassId, ViewData["Categories"] as List<SelectListItem>"请选择")

创建四：

            BLL.Sorts sortbll = new BLL.Sorts();

            ViewBag.Select = sortbll.GetList().Select(d => new SelectListItem()

            {

                Text = d.Sname,

                Value = d.Id.ToString(),

                Selected = (model.Sid == d.Id) ? true : false

            });

前台：

@Html.DropDownListFor(model => model.Sid, ViewBag.Select as List<SelectListItem>, "请选择")

创建5

ViewBag.MusicType = new SelectList(typebll.GetList(), "TypeId", "TypeName");

                    ViewBag.MusicType = new SelectList(typebll.GetList(), "TypeId", "TypeName", MusicType);