MVC小技巧

1.asp.net mvc 后台代码在前台输出时出现 & 等乱码

用@Html.Raw()方法输出；

@html.Raw()方法还可以用在脚本中直接输出脚本语句。

2.后台直接输出HTML

@(new HtmlString(ViewBag.Content))

3.绑定select

3.1 固定值绑定

Dictionary<string, string> type = new Dictionary<string, string>();
type.Add("1", "教师");
type.Add("2", "校区管理员");
type.Add("3", "管理员");
SelectList tList = new SelectList(type, "key", "value", s.FType);
ViewData["ddltype"] = tList;

@Html.DropDownList("Select_Type", (ViewData["ddltype"] as SelectList), new { @class = "select1" })

3.2 动态绑定

//读取学生所属校区
List<T_School> slist = sm.GetAllBySQL(string.Format(" AND FState=1 AND PID in ({0})", stu.FAreaId)).ToList();
IList<SelectListItem> selectItem = new List<SelectListItem>();
selectItem.Add(new SelectListItem { Text = "全部校区", Value = 0 + "", Selected = true });//添加第一个下拉列表框的值
foreach (T_School ss in slist)
{
//循环添加下拉列表框的值
SelectListItem s = new SelectListItem { Text = ss.FName, Value = ss.PID + "", Selected = (ss.PID == Convert.ToInt32(Request["s"] == null ? "0" : Request["s"]) ? true : false) };
selectItem.Add(s);
}
ViewData["ddlSchool"] = selectItem;



@Html.DropDownList("Select_School", (ViewData["ddlSchool"] as IList<SelectListItem>), new { @class = "select1" })