MVC 中@Html.DropDownListFor() 设置选中项这么不好使？

lkf181 2014-08-21 11:15:09

由于不知道错误原因在哪我尽量把代码都贴出来吧：
重点是：在 Controller 类里我给 SelectListItem集合的某项 Selected 赋值为TRUE 在视图中就应该将该项选中吧？？在我这怎么没还是呢？没有任何项选中！！
Controller 类：

using S01MVC.Models;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;



namespace S01MVC.Controllers

{

    public class LkfValidateController : Controller

    {

        //

        // GET: /LkfValidate/



        public ActionResult Index()

        {

			LkfValidateData model = new LkfValidateData()

			{

				InCome = 1000000,

				LastLoginTime = DateTime.Now.AddDays(-5),

				UserPassword = "12345678",

				UserName = "郭德纲",

				UserID = 1

			};

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

			list.Add(new SelectListItem() { Text = "500元以下", Value = "500" });

			list.Add(new SelectListItem() { Text = "1000元以下", Value = "1000" });

			list.Add(new SelectListItem() { Text = "一万元以下", Value = "10000" });

			list.Add(new SelectListItem() { Text = "十万元以下", Value = "100000"});

			list.Add(new SelectListItem() { Text = "一百万元以下", Value = "1000000", Selected = true });

			ViewData["income"] = list.AsEnumerable();

			return View(model);

        }

    }

}

Views 视图：



@model  S01MVC.Models.LkfValidateData

@{

    Layout = null;

}



<!DOCTYPE html>



<html>

<head>

    <meta name="viewport" content="width=device-width" />

    <title>Index</title>

	<style type="text/css">

		#tbinfo{border:1px solid #0094ff;

						margin:auto}

		#tbinfo td{

			border: 1px solid #0094ff;

			

		}

	</style>

</head>

<body>

    <div>

        @using(Html.BeginForm("edit","LkfValidateData",FormMethod.Post))

		{

			IHtmlString stralogn = Html.Raw("align=\"right\"");

			<table id="tbinfo">

				<tr><td align="right">@Html.LabelFor(c=>c.UserID)</td><td>@Model.UserID</td></tr>

				<tr><td @stralogn>@Html.LabelFor(c => c.UserName)</td><td>@Html.TextBoxFor(c => c.UserName) </td></tr>

				<tr><td @stralogn>@Html.LabelFor(c => c.UserPassword)</td><td>@Html.EditorFor(c=>c.UserPassword)</td></tr>

				<tr><td @stralogn>@Html.LabelFor(c => c.LastLoginTime)</td><td>@Html.DisplayTextFor(c=>c.LastLoginTime)</td></tr>

				<tr><td @stralogn>@Html.LabelFor(c => c.InCome)</td><td>@Html.DropDownListFor(c=>c.InCome,ViewData["income"] as IEnumerable<SelectListItem>)</td></tr>

			

			</table>

		}

    </div>

</body>

</html>

模型类：LkfValidateData



namespace S01MVC.Models

{

	public class LkfValidateData

	{

		[DisplayNameAttribute("用户ID")]

		public long UserID { get; set; }

		[DisplayName("用户名")]

		public string UserName { get; set; }

		[DisplayName("用户密码")]

		[DataTypeAttribute(DataType.Password)]

		public string UserPassword { get; set; }	

		[DisplayName("最后登录时间")]

		public DateTime? LastLoginTime { get; set; }

		[DisplayName("收入")]

		public decimal InCome { get; set; }

	}

}