.net mvc4 一个 view 显示多个 model

今天做到这个，记录一下。

解决的办法是。定义一个class：viewModel。把要显示的model放进去。

Controller：

[csharp] view plain copy

print?

1. using System;  
2. using System.Collections.Generic;  
3. using System.Linq;  
4. using System.Web;  
5. using System.Web.Mvc;  
6. using MvcService.Models;  
7.   
8. namespace MvcService.Controllers  
9. {  
10.     public class viewModel  
11.     {  
12.         public List<New> news { get; set; }  
13.         public List<Category> categories { get; set; }  
14.   
15.         public viewModel(List<New> newsList, List<Category> categoriesList)  
16.         {  
17.             this.news = newsList;  
18.             this.categories = categoriesList;  
19.         }  
20.     }  
21.   
22.     public class HomeController : Controller  
23.     {  
24.         private ServiceEntities db = new ServiceEntities();  
25.   
26.         public ActionResult Index()  
27.         {  
28.             var vm = new viewModel(db.News.ToList(), db.Categories.ToList());  
29.   
30.             vm.news = (from n in db.News  
31.                        where n.isDel == false && n.state == true  
32.                        orderby n.createTime descending  
33.                        select n).Take(16).ToList();  
34.   
35.             vm.categories = (from n in db.Categories  
36.                              where n.pId == 0 && n.isDel == false && n.state == true  
37.                              select n).ToList();  
38.   
39.             return View(vm);  
40.         }  
41.     }  

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Mvc;using MvcService.Models;namespace MvcService.Controllers{    public class viewModel    {        public List<New> news { get; set; }        public List<Category> categories { get; set; }        public viewModel(List<New> newsList, List<Category> categoriesList)        {            this.news = newsList;            this.categories = categoriesList;        }    }    public class HomeController : Controller    {        private ServiceEntities db = new ServiceEntities();        public ActionResult Index()        {            var vm = new viewModel(db.News.ToList(), db.Categories.ToList());            vm.news = (from n in db.News                       where n.isDel == false && n.state == true                       orderby n.createTime descending                       select n).Take(16).ToList();            vm.categories = (from n in db.Categories                             where n.pId == 0 && n.isDel == false && n.state == true                             select n).ToList();            return View(vm);        }    }

View：

[html] view plain copy

print?

1. @using MvcService.Models  
2. @model MvcService.Controllers.viewModel //引用HomeControllers中自定义的viewModel  
3. @{  
4.     ViewBag.Title = "Index";  
5.     Layout = "~/Views/Shared/_IndexLayout.cshtml";  
6. }  
7. <div class="main_1">  
8.     <h2>热点问题</h2>  
9.     <ul>  
10.         @if (Model != null)  
11.         {  
12.             foreach (var n in Model.news)  
13.             {  
14.             <li><a href="/home/newsdetails">@(n.title.Length > 25 ? n.title.Substring(0, 25) + "..." : n.title)</a> </li>  
15.             }  
16.         }  
17.     </ul>  
18.     <div class="clear"></div>  
19. </div>  
20. <!--main_1结束-->  
21.   
22. <div class="main_2">  
23.     @if (Model != null)  
24.     {  
25.         foreach (var c in Model.categories)  
26.         {  
27.         <dl>  
28.             <dt>@c.name</dt>  
29.             <dd>  
30.                 <a href="/home/newslist">会员信息</a>   
31.                 <a href="/home/newslist">注册及登录</a>  
32.             </dd>  
33.         </dl>  
34.         }  
35.     }  
36. </div>  
37. <!--main_2结束-->  

@using MvcService.Models@model MvcService.Controllers.viewModel //引用HomeControllers中自定义的viewModel@{    ViewBag.Title = "Index";    Layout = "~/Views/Shared/_IndexLayout.cshtml";}<div class="main_1">    <h2>热点问题</h2>    <ul>        @if (Model != null)        {            foreach (var n in Model.news)            {            <li><a href="/home/newsdetails">@(n.title.Length > 25 ? n.title.Substring(0, 25) + "..." : n.title)</a> </li>            }        }    </ul>    <div class="clear"></div></div><!--main_1结束--><div class="main_2">    @if (Model != null)    {        foreach (var c in Model.categories)        {        <dl>            <dt>@c.name</dt>            <dd>                <a href="/home/newslist">会员信息</a>                 <a href="/home/newslist">注册及登录</a>            </dd>        </dl>        }    }</div><!--main_2结束-->

附上效果图.

还有一个问题，我想橙色的显示该类别的子类别。要怎么写。。大神指导下。。

我给出category的表结构。  pId = 0 代表的是父级菜单。

*************************************************12月24更新************************************************************

解决上面的问题，不过不用上面 viewModel 的办法了。
我们用ViewBag。在此之前，先新建一个class：Cate.cs，用来存放取出来的数据。
Cate.cs：

[csharp] view plain copy

print?

1. namespace MvcService.Models  
2. {  
3.     public class Cate  
4.     {  
5.         public string name { get; set; }  //1级 name  
6.         public int[] id { get; set; }     //2级 id  
7.         public string[] cname { get; set; }  //2级 name  
8.     }  
9. }  

namespace MvcService.Models{    public class Cate    {        public string name { get; set; }  //1级 name        public int[] id { get; set; }     //2级 id        public string[] cname { get; set; }  //2级 name    }}

Controller：

[csharp] view plain copy

print?

1. using System;  
2. using System.Collections.Generic;  
3. using System.Linq;  
4. using System.Web;  
5. using System.Web.Mvc;  
6. using MvcService.Models;  
7.   
8. namespace MvcServiceCenter.Controllers  
9. {  
10.     public class HomeController : Controller  
11.     {  
12.         private ServiceEntities db = new ServiceEntities();  
13.   
14.         public ActionResult Index()  
15.         {  
16.             //热点  
17.             ViewBag.redian = (from n in db.News where n.isDel == false && n.state == true  
18.                               orderby n.aClick descending select n).Take(16).ToList();  
19.   
20.             //栏目  
21.             //ViewBag.lanmu = (from c in db.Categories where c.pId == 0 && c.isDel == false && c.state == true select c).ToList();  
22.             List<Cate> list = new List<Cate>();  
23.             var one = db.Categories.Where(a => a.pId == 0);    //取出第一级.  
24.             foreach (var b in one)  
25.             {  
26.                 Cate cate = new Cate();  
27.                 cate.name = b.name;  //保存第一级的name  
28.                 var two = db.Categories.Where(c => c.pId == b.id);  //取出第二级  
29.                 int[] id = new int[two.Count()];  
30.                 string[] ss = new string[two.Count()];  
31.                 int num = 0;  
32.                 foreach (var d in two)  
33.                 {  
34.                     ss[num] = d.name;  
35.                     id[num] = d.id;  
36.                     num++;  
37.                 }  
38.                 cate.id = id;  //保存第二级的id  
39.                 cate.cname = ss;  //保存第二级的name  
40.                 list.Add(cate);    
41.             }  
42.             ViewBag.lanmu = list;  
43.   
44.             return View();  
45.         }  
46.     }  
47. }  

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Mvc;using MvcService.Models;namespace MvcServiceCenter.Controllers{    public class HomeController : Controller    {        private ServiceEntities db = new ServiceEntities();        public ActionResult Index()        {            //热点            ViewBag.redian = (from n in db.News where n.isDel == false && n.state == true                              orderby n.aClick descending select n).Take(16).ToList();            //栏目            //ViewBag.lanmu = (from c in db.Categories where c.pId == 0 && c.isDel == false && c.state == true select c).ToList();            List<Cate> list = new List<Cate>();            var one = db.Categories.Where(a => a.pId == 0);    //取出第一级.            foreach (var b in one)            {                Cate cate = new Cate();                cate.name = b.name;  //保存第一级的name                var two = db.Categories.Where(c => c.pId == b.id);  //取出第二级                int[] id = new int[two.Count()];                string[] ss = new string[two.Count()];                int num = 0;                foreach (var d in two)                {                    ss[num] = d.name;                    id[num] = d.id;                    num++;                }                cate.id = id;  //保存第二级的id                cate.cname = ss;  //保存第二级的name                list.Add(cate);              }            ViewBag.lanmu = list;            return View();        }    }}

View：

[html] view plain copy

print?

1. @{  
2.     ViewBag.Title = "首页";  
3.     Layout = "~/Views/Shared/_IndexLayout.cshtml";  
4. }  
5. <div class="main_1">  
6.     <h2>热点问题</h2>  
7.     <ul>  
8.         @if (ViewBag.redian != null)  
9.         {  
10.             foreach (var n in ViewBag.redian)  
11.             {  
12.             <li><a href="/home/newsdetails/@n.id" title="@n.title">  
13.                 @(n.title.Length > 25 ? n.title.Substring(0, 25) + "..." : n.title)</a></li>  
14.             }  
15.         }  
16.     </ul>  
17.     <div class="clear"></div>  
18. </div>  
19. <!--main_1结束-->  
20. <div class="main_2">  
21.     @if (ViewBag.lanmu != null)  
22.     {  
23.         foreach (var c in ViewBag.lanmu)  
24.         {  
25.         <dl>  
26.             <dt>@c.name</dt>  
27.             <dd>  
28.                 @for (int i = 0; i < c.cname.Length; i++)  
29.                 {  
30.                     <a href="/home/newslist/@c.id[i]">@c.cname[i]</a>  
31.                 }  
32.             </dd>  
33.         </dl>  
34.         }  
35.     }  
36. </div>  
37. <!--main_2结束-->  

@{    ViewBag.Title = "首页";    Layout = "~/Views/Shared/_IndexLayout.cshtml";}<div class="main_1">    <h2>热点问题</h2>    <ul>        @if (ViewBag.redian != null)        {            foreach (var n in ViewBag.redian)            {            <li><a href="/home/newsdetails/@n.id" title="@n.title">                @(n.title.Length > 25 ? n.title.Substring(0, 25) + "..." : n.title)</a></li>            }        }    </ul>    <div class="clear"></div></div><!--main_1结束--><div class="main_2">    @if (ViewBag.lanmu != null)    {        foreach (var c in ViewBag.lanmu)        {        <dl>            <dt>@c.name</dt>            <dd>                @for (int i = 0; i < c.cname.Length; i++)                {                    <a href="/home/newslist/@c.id[i]">@c.cname[i]</a>                }            </dd>        </dl>        }    }</div><!--main_2结束-->

图：