參考鏈接:
http://www.cnblogs.com/insus/p/4632889.html
https://www.cnblogs.com/insus/p/4623507.html
參考鏈接:
http://www.cnblogs.com/insus/p/4632889.html
https://www.cnblogs.com/insus/p/4623507.html
public ActionResult Index() { List<SelectListItem> items = new List<SelectListItem>();