ASP.NET MVC架构与实战系列之一：理解MVC底层运行机制

public class MvcApplication : System.Web.HttpApplication
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        // 可以忽略的路由配置
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
        // 设置默认路由
        routes.MapRoute(
            "Default", // 路由名称
            "{controller}/{action}/{id}", // 带有参数的 URL
            new { controller = "Home", action = "Index", id = UrlParameter.Optional } // 参数默认值
        );
    }

    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        RegisterRoutes(RouteTable.Routes);
    }
}

<httpModules>
  <add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing, 
       Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</httpModules>

//表示执行控制器方法出错时将会打开友好的错误提示页面
[HandleError]
//控制器必须以"***Controllers"命名,并实现Controller或IController
public class HomeController : Controller
{
    //控制器中的方法必须是public,如果是内部方法，将被设置为[NonActionAttribute]
    public ActionResult Index()
    {
        //设置字典数据以便将指定数据传递到视图
        ViewData["Message"] = "Welcome, Miracle!";
        //返回指定的内容到浏览器中
        return View();
    }
}

public class HomeController : Controller
{
    //实例化数据实体对象
    private Northwind db = new Northwind();
    //数据显示
    public ActionResult Index()
    {
        var model = db.Categories.ToList();
        return View(model);
    }
    //编辑
    [AcceptVerbs(HttpVerbs.Get)]
    public ActionResult Edit(int id)
    {
        var model = db.Categories.First(c => c.CategoryID == id);
        return View(model);
    }
    [AcceptVerbs(HttpVerbs.Post)]
    public ActionResult Edit(int id, FormCollection form)
    {
        var model = db.Categories.First(c => c.CategoryID == id);
        UpdateModel(model, new[] { "CategoryName", "Description" });
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    //创建
    [AcceptVerbs(HttpVerbs.Get)]
    public ActionResult Create()
    {
        var model = new Categories();
        return View(model);
    }
    [AcceptVerbs(HttpVerbs.Post)]
    public ActionResult Create(int id, FormCollection form)
    {
        var model = db.Categories.FirstOrDefault(c => c.CategoryID == id);
        if (model == null)
        {
            var cate = new Categories();
            UpdateModel(cate, new[] { "CategoryName", "Description" });
            db.AddToCategories(cate);
            db.SaveChanges();
            return RedirectToAction("Index");
        }
        else
        {
            return RedirectToAction("Create");
        }
    }
    //详情
    [AcceptVerbs(HttpVerbs.Get)]
    public ActionResult Details(int id)
    {
        var model = db.Categories.First(c => c.CategoryID == id);
        return View(model);
    }
}

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<MVCDemo.Models.Categories>>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
    Index
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <h2>
        类别列表</h2>
    <table border="1">
        <tr>
            <th>操作
            </th>
            <th>
                类别编号
            </th>
            <th>
                类别名称
            </th>
            <th>
                说明
            </th>
        </tr>
        <% foreach (var item in Model)
           { %>
        <tr>
            <td>
                <%: Html.ActionLink("编辑", "Edit", new { id=item.CategoryID }) %>
                |
                <%: Html.ActionLink("详情", "Details", new { id=item.CategoryID })%>
            </td>
            <td>
                <%: item.CategoryID %>
            </td>
            <td>
                <%: item.CategoryName %>
            </td>
            <td>
                <%: item.Description %>
            </td>
        </tr>
        <% } %>
    </table>
    <p>
        <%: Html.ActionLink("创建", "Create") %>
    </p>
</asp:Content>