一步步打造简单的MVC电商网站BooksStore（4）_实用技巧_

 /// 
 /// 后台管理控制器 /// 
 public class AdminController : Controller { private readonly IBookRepository _bookRepository; public AdminController(IBookRepository bookRepository) { _bookRepository = bookRepository; } /// 
 /// 首页 /// 
 ///  public ActionResult Index() { return View(_bookRepository.Books); } } 

 @RenderBody() 

 .table { width: 100%; padding: 0; margin: 0; } .table th { font: bold 12px "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif; color: #4f6b72; border-right: 1px solid #C1DAD7; border-bottom: 1px solid #C1DAD7; border-top: 1px solid #C1DAD7; letter-spacing: 2px; text-transform: uppercase; text-align: left; padding: 6px 6px 6px 12px; background: #CAE8EA no-repeat; } .table td { border-right: 1px solid #C1DAD7; border-bottom: 1px solid #C1DAD7; background: #fff; font-size: 14px; padding: 6px 6px 6px 12px; color: #4f6b72; } .table td.alt { background: #F5FAFA; color: #797268; } .table th.spec, td.spec { border-left: 1px solid #C1DAD7; } 

 @model IEnumerable @{ Layout = "~/Views/Shared/_AdminLayout.cshtml"; } 
 @Html.ActionLink("新增", "Edit") 
 @foreach (var item in Model) {  } 
 名称 
 描述 
 价格 
 分类 
 @Html.DisplayFor(modelItem => item.Name) 
 @Html.DisplayFor(modelItem => item.Description) 
 @Html.DisplayFor(modelItem => item.Price) 
 @Html.DisplayFor(modelItem => item.Category) 
 @Html.ActionLink("编辑", "Edit", new { id = item.Id }) @using (Html.BeginForm("Delete", "Admin", FormMethod.Post, new { style = "display:inline;" })) { @Html.Hidden("id", item.Id)  } 

 /// 
 /// 编辑 /// 
 ///  ///  public ActionResult Edit(int id = 0) { if (id == 0) { return View(new Book()); } var model = _bookRepository.Books.FirstOrDefault(x => x.Id == id); return View(model); } /// 
 /// 编辑 /// 
 ///  ///  [HttpPost] public ActionResult Edit(Book book) { if (!ModelState.IsValid) { return View(book); } _bookRepository.SaveBook(book); return RedirectToAction("Index"); } 

 /// 
 /// 书存储库接口 /// 
 public interface IBookRepository { /// 
 /// 书模型集合 /// 
 IQueryable Books { get; } /// 
 /// 保存书 /// 
 ///  ///  int SaveBook(Book book); /// 
 /// 删除书 /// 
 ///  ///  Book DeleteBook(int id); } 

 /// 
 /// 书存储库 /// 
 public class EfBookRepository : IBookRepository { private readonly EfDbContext _context = new EfDbContext(); /// 
 /// 书模型集合 /// 
 public IQueryable Books => _context.Books; /// 
 /// 保存书 /// 
 ///  ///  public int SaveBook(Book book) { if (book.Id == 0) { _context.Books.Add(book); } else { var model = _context.Books.Find(book.Id); if (model==null) { return 0; } model.Category = book.Category; model.Description = book.Description; model.Name = book.Name; model.Price = book.Price; } return _context.SaveChanges(); } /// 
 /// 删除书 /// 
 ///  ///  public Book DeleteBook(int id) { var model = _context.Books.Find(id); if (model == null) { return null; } _context.Books.Remove(model); _context.SaveChanges(); return model; } } 

 [Table("Book")] public class Book { /// 
 /// 标识 /// 
 public int Id { get; set; } /// 
 /// 名称 /// 
 [Required(ErrorMessage = "名称不能为空")] public string Name { get; set; } /// 
 /// 描述 /// 
 [Required(ErrorMessage = "描述不能为空")] public string Description { get; set; } /// 
 /// 价格 /// 
 [Required(ErrorMessage = "价格不能为空")] [Range(0.01, double.MaxValue, ErrorMessage = "请填写合适的价格")] public decimal Price { get; set; } /// 
 /// 分类 /// 
 [Required(ErrorMessage = "分类不能为空")] public string Category { get; set; } } 

 @model Wen.BooksStore.Domain.Entities.Book @{ Layout = "~/Views/Shared/_AdminLayout.cshtml"; } 
编辑
 @Html.ValidationSummary() 
 @using (Html.BeginForm()) { @Html.HiddenFor(x => x.Id) 
名称
@Html.TextBoxFor(x => x.Name)
价格
@Html.TextBoxFor(x => x.Price)
分类
@Html.TextBoxFor(x => x.Category)
描述
@Html.TextAreaFor(x => x.Description)
 } 

 /// 
 /// 删除 /// 
 ///  ///  [HttpPost] public ActionResult Delete(int id) { _bookRepository.DeleteBook(id); return RedirectToAction("Index"); } 

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