MVC2实例

时间：2010-10-20 来源：小绿虫

选择C#应用程序，在web应用程序中没有ADO.NET实体数据模型

点击下一步

新建sql连接

只选择一个表就够了：Categories表

实体类创建成功

2.控制器 Controllers

先删除该文件夹下的HomeController

然后在Controllers文件夹上单击鼠标右键添加控制器

选择增删查该操作方法

3.修改控制器代码：

先看看刚刚创建好的实体类的命名空间，Northwind.Disigner.cs

namespace MvcApplication2.Models
{
    #region 上下文

    /// <summary>
    /// 没有元数据文档可用。
    /// </summary>
    public partial class NorthwindEntities : ObjectContext

在home控制器下添加实体类的实例化代码

public class HomeController : Controller
{
NorthwindEntities Northwind = new NorthwindEntities();//实例化实体类修改添加方法

代码   [AcceptVerbs(HttpVerbs.Get)]
        public ActionResult Create()
        {
            Categories cate = new Categories();
            return View(cate);
        }

         [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create(int categoryId,FormCollection form)
        {
            var model = Northwind.Categories.First(c => c.CategoryID == categoryId);
            if (model == null)
            {
                Categories category = new Categories();
                UpdateModel(model, new[] { "CategoryName", "Description" });
                Northwind.AddToCategories(category);
                Northwind.SaveChanges();
                return RedirectToAction("Index");
            }
            else
            {
                return RedirectToAction("Create");
            }

        }

[AcceptVerbs(HttpVerbs.Post)] 提交表单的一个标记，以post方式提交

修改详细信息代码：

     public ActionResult Details(int id)
        {
            var model = Northwind.Categories.First(c => c.CategoryID == id);

            return View(model);
        } 修改编辑代码：

代码   public ActionResult Edit(int id)
        {
              var model = Northwind.Categories.First(c => c.CategoryID == id);

              return View(model);
        }

        //[HttpPost]
        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Edit(int id, FormCollection collection)
        {
            var model = Northwind.Categories.First(c => c.CategoryID == id);
            UpdateModel(model, new[] { "CategoryName", "Description" });
            Northwind.SaveChanges();
            return RedirectToAction("Index");

        }

暂时不做删除!

控制器完整代码：

代码 using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcApplication2.Models;

namespace MvcApplication2.Controllers
{
    public class HomeController : Controller
    {
        NorthwindEntities Northwind = new NorthwindEntities();//实例化实体类

        public ActionResult Index()
        {
            var model = Northwind.Categories.ToList();
            return View(model);
        }

        public ActionResult Details(int id)
        {
            var model = Northwind.Categories.First(c => c.CategoryID == id);

            return View(model);
        }

         [AcceptVerbs(HttpVerbs.Get)]
        public ActionResult Create()
        {
            Categories cate = new Categories();
            return View(cate);
        }

         [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create(int categoryId,FormCollection form)
        {
            var model = Northwind.Categories.First(c => c.CategoryID == categoryId);
            if (model == null)
            {
                Categories category = new Categories();
                UpdateModel(model, new[] { "CategoryName", "Description" });
                Northwind.AddToCategories(category);
                Northwind.SaveChanges();
                return RedirectToAction("Index");
            }
            else
            {
                return RedirectToAction("Create");
            }

        }

        public ActionResult Edit(int id)
        {
              var model = Northwind.Categories.First(c => c.CategoryID == id);

              return View(model);
        }

        //[HttpPost]
        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Edit(int id, FormCollection collection)
        {
            var model = Northwind.Categories.First(c => c.CategoryID == id);
            UpdateModel(model, new[] { "CategoryName", "Description" });
            Northwind.SaveChanges();
            return RedirectToAction("Index");

        }

        public ActionResult Delete(int id)
        {
            return View();
        }

        [HttpPost]
        public ActionResult Delete(int id, FormCollection collection)
        {
            try
            {
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
    }
}

4.创建view视图

在Index或其他代码的方法上点鼠标右键添加视图