ASP.NET MVC删除数据

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Index.cshtml

@model IEnumerable<MvcExample.Models.Category><script type="text/javascript">    function Delete(categoryID) {        if (confirm("确定要删除？")) {            url = "/Category/Delete";            parameter = { id: categoryID };            $.post(url, parameter, function (data) {                alert("删除成功！");                window.location = "/Category";            });        }    }</script><table>    <tr class="title">        <td>            名称        </td>        <td>            操作        </td>    </tr>    @foreach (var item in Model)    {        <tr>            <td>                @item.CategoryName            </td>            <td>                <input type="button" onclick="Delete(@item.CategoryID)" text="删除"/>            </td>        </tr>    }</table>

CategoryController.cs

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Mvc;using System.Data.Entity;using MvcExample.Models;namespace MvcExample.Controllers{    public class CategoryController : Controller    {        private MvcExampleContext ctx = new MvcExampleContext();        public ActionResult Index()        {            return View(ctx.Categories.ToList());        }        [HttpPost]        public ActionResult Delete(int id)        {            Category category = ctx.Categories.Find(id);            ctx.Categories.Remove(category);            ctx.SaveChanges();            return RedirectToAction("Index");        }        protected override void Dispose(bool disposing)        {            ctx.Dispose();            base.Dispose(disposing);        }    }}

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