八、Asp.Net MVC4.0開發CMS系統案例之欄目內容模型管理

    網站後臺中有欄目管理功能，對欄目管理中有欄目內容模塊項，比如我們把網站的每個欄目劃分爲新聞模塊、圖片模塊、文章模塊、產品模塊等。

    欄目的模型類別管理包括模塊名稱、模塊類型、是否啓用、描述等。

    一、Models屬性：

using System.Linq;
using System.Web;

namespace Hillstone.Models
{
    public class SysCategoryModel
    {
        [Key]
        public int ModelID { get; set; }

        [Display(Name="模型名稱")]
        [Required(ErrorMessage="×")]
        [StringLength(50,ErrorMessage="×")]
        public string ModelName { get; set; }

        [Display(Name = "模型類型")]
        [Required(ErrorMessage = "×")]
        [StringLength(50, ErrorMessage = "×")]
        public string ModelType { get; set; }

        [Display(Name="是否啓用")]
        [Required(ErrorMessage = "×")]
        public bool Enable{ get; set; }

        [Display(Name="模型描述")]
        [StringLength(100,ErrorMessage="×")]
        public string Description{ get; set; }
        
    }
}

是否啓用：如果不啓用，那麼在此類型的欄目將不能使用。

    二、DAL數據層：訪問或設置實體數據集

public DbSet<SysCategoryModel> categoryModel { get; set; }

    三、BLL業務邏輯層：讀取、新增、編輯、刪除、查看功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Hillstone.Models;
using System.Data.Entity;
using Hillstone.DAL;

namespace Hillstone.BLL
{
    public class SysCategoryModelReponsitory : IRepositoryBase<SysCategoryModel>
    {
        private HillstoneContext db = new HillstoneContext();

        /// <summary>
        /// 讀取模塊列表
        /// </summary>
        /// <returns></returns>
        public IQueryable<SysCategoryModel> List()
        {
            var _categoryModel = db.categoryModel;
            return _categoryModel;
        }

        /// <summary>
        /// 讀取一條模塊數據
        /// </summary>
        /// <param name="Id"></param>
        /// <returns></returns>
        public override SysCategoryModel Find(int Id)
        {
            var _categoryModel = db.categoryModel.SingleOrDefault(c => c.ModelID == Id);
            return _categoryModel;
        }

        /// <summary>
        /// 添加一條模塊數據
        /// </summary>
        /// <param name="Tmodel"></param>
        /// <returns></returns>
        public override bool Add(SysCategoryModel Tmodel)
        {
            db.categoryModel.Add(Tmodel);
            if (db.SaveChanges() > 0)
            {
                return true;
            }
            else {
                return false;
            }
        }

        /// <summary>
        /// 刪除一條模塊數據
        /// </summary>
        /// <param name="Id">ID</param>
        /// <returns></returns>
        public override bool Delete(int Id)
        {
            var _categoryModel = db.categoryModel.FirstOrDefault(c => c.ModelID == Id);
            if (_categoryModel != null)
            {
                return Delete(_categoryModel);
            }
            else {
                return false;
            }
            
        }

        /// <summary>
        /// 刪除一條模塊數據
        /// </summary>
        /// <param name="sysCategoryModel">數據模型</param>
        /// <returns></returns>
        public bool Delete( SysCategoryModel sysCategoryModel)
        {
            db.categoryModel.Remove(sysCategoryModel);
            if (db.SaveChanges() > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 修改模塊數據
        /// </summary>
        /// <param name="Tmodel">模塊數據模型</param>
        /// <returns></returns>
        public override bool Update(SysCategoryModel Tmodel)
        {
            db.categoryModel.Attach(Tmodel);
            db.Entry<SysCategoryModel>(Tmodel).State = System.Data.Entity.EntityState.Modified;
            if(db.SaveChanges()>0){
                return true;
            }
            else
            {
                return false;
            }
        }

    }
}

注意：在編輯的時候要引用

using System.Data.Entity;

才能使用

            db.Entry<SysCategoryModel>(Tmodel).State = System.Data.Entity.EntityState.Modified;

    四、控制器：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Hillstone.BLL;
using Hillstone.Models;

namespace Hillstone.Controllers.Sys.Cotegory
{
    public class CategoryModelController : Controller
    {
        private SysCategoryModelReponsitory categoryModelRsy = new SysCategoryModelReponsitory();

        /// <summary>
        /// 列表頁面
        /// </summary>
        /// <returns></returns>
        public ActionResult List()
        {
           var _categoryModel = categoryModelRsy.List();
           return View(_categoryModel);
        }

        /// <summary>
        /// 添加頁面
        /// </summary>
        /// <returns></returns>
        public ActionResult Create()
        {
            return View();
        }

        /// <summary>
        /// 提交添加頁面
        /// </summary>
        /// <param name="sysCategoryModel"></param>
        /// <returns></returns>
        [HttpPost]
        public ActionResult Create(SysCategoryModel sysCategoryModel)
        {
            if (ModelState.IsValid)
            {
                if (categoryModelRsy.Add(sysCategoryModel))
                {
                    ModelState.AddModelError("Message", "成功!");
                }
                else
                {
                    ModelState.AddModelError("Message", "失敗!");
                }
            }
            return View();
        }

        /// <summary>
        /// 編輯頁面
        /// </summary>
        /// <returns></returns>
        public ActionResult Edit(int id)
        {
            var categoryModel = categoryModelRsy.Find(id);
            return View(categoryModel);
        }

        /// <summary>
        /// 提交編輯頁面
        /// </summary>
        /// <param name="sysCategoryModel"></param>
        /// <returns></returns>
        [HttpPost]
        public ActionResult Edit(SysCategoryModel sysCategoryModel)
        {
            if (ModelState.IsValid) {
                if (categoryModelRsy.Update(sysCategoryModel))
                {
                    ModelState.AddModelError("Message", "成功！");
                }
                else {
                    ModelState.AddModelError("Message","失敗！");
                }
            }
            return View();
        }

        /// <summary>
        /// 查看頁面
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public ActionResult Details(int id)
        {
            var _sysCategoryModel = categoryModelRsy.Find(id);
            return View(_sysCategoryModel);
        }

        /// <summary>
        /// 刪除一條模塊
        /// </summary>
        /// <param name="id">ID</param>
        /// <returns></returns>
        [HttpPost]
        public ActionResult Delete(int id)
        {
            if (categoryModelRsy.Delete(id))
            {
                return new HttpStatusCodeResult(System.Net.HttpStatusCode.OK);
            }
            else
            {
                return new HttpStatusCodeResult(System.Net.HttpStatusCode.NotFound);
            }
        }
        //AJAX刪除功能
        [HttpPost]
        public JsonResult DeleteAsJson(int id)
        {
            var _categoryModel = categoryModelRsy.Find(id);
            if (categoryModelRsy != null)
            {
                return Json(categoryModelRsy.Delete(id);
            }
            else
            {
                return Json(false);
            }
        }
    }
}

    五、視圖頁面

    1、顯示列表：主要是Json刪除功能的實現

@model IEnumerable<Hillstone.Models.SysCategoryModel>

@{
    ViewBag.Title = "List";
    Layout = "~/Views/Shared/_Layout.cshtml";    
}

@section Scripts{
    @Scripts.Render("~/bundles/jqueryval")
    <script type="text/javascript">

        function DeleteAsJson(id,name)
        {
            if (confirm("你確認要刪除" + name + "?")) {
                $.post("@Url.Action("DeleteAsJson","CategoryModel")", { Id: id }, function (data) {
                            if (data) {
                                alert("刪除成功!");
                                location.reload();
                            }
                        })
            }
        }

@*        $("#btn_del").click(function () {
            if (confirm("您確定要刪除改欄目嗎？\n如該欄目有子欄目請先刪除子欄目！")) {
                $.post("@Url.Action("ManageDeleteJson","Category")", { id: $("#CategoryId").val() }, function (data) {
                if (data) {
                    alert("成功刪除欄目！");
                    top.location = "@Url.Action("Manage", "Category")";
                }
                else {
                    alert("刪除欄目失敗！如該欄目有子欄目請先刪除子欄目。");
                }
            });
        }
        });*@
    </script>
    }
<h2>List</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table>
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.ModelName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.ModelType)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Enable)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Description)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.ModelName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.ModelType)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Enable)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Description)
        </td>
        <td>
            @Html.ActionLink("編輯", "Edit", new { id=item.ModelID }) 
            @Html.ActionLink("查看", "Details", new { id=item.ModelID }) |
            <a id="btn_del" href="javascript:void(0)" onclick="DeleteAsJson(@item.ModelID,'@item.ModelName')">刪除</a>
        </td>
    </tr>
}

</table>

其他頁面基本保持不變。