ASP.NET Core 打造一个简单的图书馆管理系统（八）学生借阅/预约/查询书籍事务

1     public class AppointmentOrLending
2     {
3         public Book Book { get; set; }
4         public string BookId { get; set; }
5         public StudentInfo Student { get; set; }
6         public string StudentId { get; set; }
7         public DateTime? AppointingDateTime { get; set; }
8     }

 1     public class StudentInfo
 2     {
 3         [Key]
 4         public string UserName { get; set; }
 5 
 6         [Required]
 7         public string Name { get; set; }
 8 
 9         /// <summary>
10         /// 学位，用来限制借书数目
11         /// </summary>
12         [Required]
13         public Degrees Degree { get; set; }
14 
15         /// <summary>
16         /// 最大借书数目
17         /// </summary>
18         [Required]
19         public int MaxBooksNumber { get; set; }
20 
21         /// <summary>
22         /// 已借图书
23         /// </summary>
24         public ICollection<AppointmentOrLending> KeepingBooks { get; set; }
25 
26         public string AppointingBookBarCode { get; set; }
27 
28         [StringLength(14, MinimumLength = 11)]
29         public string PhoneNumber { get; set; }
30 
31         /// <summary>
32         /// 罚款
33         /// </summary>
34         public decimal Fine { get; set; }               
35     }

 1     public class LendingInfoDbContext:DbContext
 2     {
 3         public LendingInfoDbContext(DbContextOptions<LendingInfoDbContext> options) : base(options)
 4         {
 5         }
 6 
 7         public DbSet<Book> Books { get; set; }
 8         public DbSet<BookDetails> BooksDetail { get; set; }
 9         public DbSet<Bookshelf> Bookshelves { get; set; }
10         public DbSet<RecommendedBook> RecommendedBooks { get; set; }
11         public DbSet<StudentInfo> Students { get; set; }
12         public DbSet<AppointmentOrLending> AppointmentOrLendings { get; set; }
13 
14         protected override void OnModelCreating(ModelBuilder modelBuilder)
15         {
16             base.OnModelCreating(modelBuilder);
17             modelBuilder.Entity<AppointmentOrLending>()
18                 .HasKey(c => new { c.BookId, c.StudentId });
19         }
20     }

cd librarydemo
add-migration AddStudents -c LibraryDemo.Data.LendingInfoDbContext
update-database -c LibraryDemo.Data.LendingInfoDbContext

 1             if (!context.Students.Any())
 2             {
 3                 IEnumerable<StudentInfo> initialStudents = new[]
 4                 {
 5                     new StudentInfo()
 6                     {
 7                         UserName = "U201600001",
 8                         Name = "Nanase",
 9                         PhoneNumber = "12345678910",
10                         Degree = Degrees.CollegeStudent,
11                         MaxBooksNumber = 10,
12                     },
13                     new StudentInfo()
14                     {
15                         UserName = "U201600002",
16                         Name = "Ruri",
17                         PhoneNumber = "12345678911",
18                         Degree = Degrees.DoctorateDegree,
19                         MaxBooksNumber = 15
20                     }
21                 };
22 
23                 IEnumerable<StudentInfo> initialAdmins = new[]
24                 {
25                     new StudentInfo()
26                     {
27                         UserName = "A000000000",
28                         Name="Admin0000",
29                         PhoneNumber = "12345678912",
30                         Degree = Degrees.CollegeStudent,
31                         MaxBooksNumber = 20
32                     },
33                     new StudentInfo()
34                     {
35                         UserName = "A000000001",
36                         Name = "Admin0001",
37                         PhoneNumber = "15827411963",
38                         Degree = Degrees.CollegeStudent,
39                         MaxBooksNumber = 20
40                     },
41                 };
42                 foreach (var student in initialStudents)
43                 {
44                     context.Students.Add(student);
45                     await context.SaveChangesAsync();
46                 }
47                 foreach (var admin in initialAdmins)
48                 {
49                     context.Students.Add(admin);
50                     await context.SaveChangesAsync();
51                 }
52             }

1 @{
2     ViewData["Title"] = "EditLendingInfo";
3     Layout = "_LendingLayout";
4 }

1 @RenderSection("SectionName")

1 @section SectionName{　
2 
3 　};

 1         [Authorize(Roles = "Admin")]
 2         public IActionResult EditLendingInfo(string barcode)
 3         {
 4             if (barcode == null)
 5             {
 6                 return RedirectToAction("BookDetails");
 7             }
 8             Book book = _lendingInfoDbContext.Books.FirstOrDefault(b => b.BarCode == barcode);
 9             return View(book);
10         }
11 
12         [HttpPost]
13         [Authorize(Roles = "Admin")]
14         [ValidateAntiForgeryToken]
15         public async Task<IActionResult> EditLendingInfo([Bind("BarCode,ISBN,BorrowTime,KeeperId,AppointedLatestTime,State")]Book book)
16         {
17             if (ModelState.IsValid)
18             {
19                 if (book.BorrowTime > DateTime.Now)
20                 {
21                     ModelState.AddModelError("", "请检查外借时间");
22                     return View(book);
23                 }
24                 if (book.AppointedLatestTime.HasValue)
25                 {
26                     if (book.AppointedLatestTime < DateTime.Now)
27                     {
28                         ModelState.AddModelError("", "请检查预约时间");
29                         return View(book);
30                     }
31 
32                     if (book.KeeperId == null)
33                     {
34                         ModelState.AddModelError("", "不存在该学生");
35                         return View(book);
36                     }
37                 }
38 
39                 StudentInfo student = await _lendingInfoDbContext.Students.Include(s => s.KeepingBooks).FirstOrDefaultAsync(s => s.UserName == book.KeeperId);
40 
41                 Book addedBook = _lendingInfoDbContext.Books
42                     .Include(b => b.Keeper).ThenInclude(k => k.KeepingBooks)
43                     .FirstOrDefault(b => b.BarCode == book.BarCode);
44                 if (addedBook == null)
45                 {
46                     return RedirectToAction("Books", new { isbn = book.ISBN });
47                 }
48 
49                 StudentInfo preStudent = addedBook.Keeper;
50                 AppointmentOrLending targetLending =
51                     preStudent?.KeepingBooks.FirstOrDefault(b => b.BookId == addedBook.BarCode);
52 
53                 addedBook.AppointedLatestTime = book.AppointedLatestTime;
54                 addedBook.State = book.State;
55                 addedBook.BorrowTime = book.BorrowTime;
56                 addedBook.MatureTime = null;
57 
58                 preStudent?.KeepingBooks.Remove(targetLending);
59 
60                 if (addedBook.BorrowTime.HasValue)
61                 {
62                     if (book.KeeperId == null)
63                     {
64                         ModelState.AddModelError("", "请检查借阅者");
65                         return View(book);
66                     }
67 
68                     if (student == null)
69                     {
70                         ModelState.AddModelError("", "不存在该学生");
71                         return View(book);
72                     }
73                     if (student != null)
74                     {
75                         if (student.KeepingBooks.Count >= student.MaxBooksNumber)
76                         {
77                             TempData["message"] = "该学生借书已超过上限";
78                         }
79 
80                         addedBook.State = BookState.Borrowed;
81                         student.KeepingBooks.Add(new AppointmentOrLending()
82                         {
83                             BookId = addedBook.BarCode,
84                             StudentId = student.UserName
85                         });
86                         addedBook.Keeper = student;
87 
88                     }
89                     addedBook.MatureTime = addedBook.BorrowTime + TimeSpan.FromDays(28);
90                 }
91 
92 
93                 TempData["message"] = "保存成功";
94                 await _lendingInfoDbContext.SaveChangesAsync();
95                 return RedirectToAction("Books", new { isbn = book.ISBN });
96             }
97             return View(book);
98         }

 1 @using LibraryDemo.Models.DomainModels
 2 @model Book
 3     <div class="form-group">
 4     @Html.LabelFor(b => b.State)
 5         @Html.DropDownListFor(b => b.State, Enum.GetValues(typeof(BookState)).Cast<Enum>().Select(state =>
 6         {
 7             string enumVal = Enum.GetName(typeof(BookState), state);
 8             string displayVal;
 9             switch (enumVal)
10             {
11                 case "Normal":
12                     displayVal = "可借阅";
13                     break;
14                 case "Readonly":
15                     displayVal = "馆内阅览";
16                     break;
17                 case "Borrowed":
18                     displayVal = "已借出";
19                     break;
20                 case "ReBorrowed":
21                     displayVal = "被续借";
22                     break;
23                 case "Appointed":
24                     displayVal = "被预约";
25                     break;
26                 default:
27                     displayVal = "";
28                     break;
29             }
30             return new SelectListItem()
31             {
32                 Text = displayVal,
33                 Value = enumVal,
34                 Selected = Model.State.ToString() == enumVal
35             };
36         }))
37     </div>

1 @model DateTime?
2 
3 @Model?.ToString("yyyy/M/dd")

 1 @using LibraryDemo.Models.DomainModels
 2 @model LibraryDemo.Models.DomainModels.Book
 3 @{
 4     ViewData["Title"] = "EditLendingInfo";
 5     Layout="_LendingLayout";
 6 }
 7 
 8 <h2>@Model.BarCode</h2>
 9 <h3>@Model.Name</h3>
10 <br/>
11 
12 <script>
13     window.onload = function() {
14         $("input").addClass("form-control");
15     }
16     window.onbeforeunload = function (event) {
17         return "您的数据未保存，确定退出？";
18     }
19     function removeOnbeforeunload() {
20         window.onbeforeunload = "";
21     }
22 </script>
23 
24 @Html.ValidationSummary(false,"",new{@class="text-danger"})
25 
26 <form asp-action="EditLendingInfo" method="post">
27     @Html.HiddenFor(b => b.BarCode)
28     @Html.HiddenFor(b => b.ISBN)
29     <div class="form-group">
30         @Html.LabelFor(b => b.KeeperId)
31         @Html.EditorFor(b => b.KeeperId)
32     </div>
33     <div class="form-group">
34         @Html.LabelFor(b => b.BorrowTime)
35         @Html.EditorFor(b => b.BorrowTime)
36     </div>
37     <div class="form-group">
38         @Html.LabelFor(b => b.AppointedLatestTime)
39         @Html.EditorFor(b => b.AppointedLatestTime)
40     </div>
41     <partial model="@Model" name="_BookStatePartial"/>
42     <input type="submit" onclick="return removeOnbeforeunload()" class="btn-primary"/>
43 </form>

 1         [Authorize]
 2         public async Task<IActionResult> PersonalInfo()
 3         {
 4             StudentInfo student = await _lendingInfoDbContext.Students.Include(s => s.KeepingBooks).ThenInclude(k => k.Book)
 5                 .FirstOrDefaultAsync(s => s.UserName == User.Identity.Name);
 6             decimal fine = 0;            
 7             foreach (var book in student.KeepingBooks.Where(b => b.Book.MatureTime < DateTime.Now && !b.AppointingDateTime.HasValue))
 8             {
 9                 fine += (DateTime.Now - book.Book.MatureTime.Value).Days * (decimal)0.2;
10                 book.Book.State = book.Book.State == BookState.Appointed ? BookState.Appointed : BookState.Expired;
11             }
12 
13             student.Fine = fine;
14             PersonalInfoViewModel model = new PersonalInfoViewModel()
15             {
16                 Student = student,
17                 BookingBook = _lendingInfoDbContext.Books.FirstOrDefault(b => b.BarCode == student.AppointingBookBarCode)
18             };
19             return View(model);
20         }

 1 @model LibraryDemo.Models.PersonalInfoViewModel
 2 @{
 3     ViewData["Title"] = "PersonalInfo";
 4     Layout = "_LendingLayout";
 5     double fine = 0;
 6 }
 7 <link rel="stylesheet" href="~/css/BookInfo.css" />
 8 
 9 <h2>@Model.Student.Name</h2>
10 <br />
11 @if (Model.Student.KeepingBooks.Any(b => b.Book.MatureTime < DateTime.Now))
12 {
13     <p>
14         罚款:@foreach (var matureBook in Model.Student.KeepingBooks.Where(b => !b.AppointingDateTime.HasValue&&b.Book.MatureTime < DateTime.Now))
15         {
16             fine += (DateTime.Now - matureBook.Book.MatureTime).Value.TotalDays * 0.2;
17         }
18         @fine
19     </p>
20 }
21 <form asp-action="ReBorrow" method="post">
22     <table>
23         <tr>
24             <th>续借</th>
25             <th>书名</th>
26             <th>条形码</th>
27             <th>状态</th>
28             <th>到期时间</th>
29             <th>索书号</th>
30         </tr>
31         @if (!Model.Student.KeepingBooks.Any())
32         {
33             <tr>
34                 <td colspan="6" style="text-align: center">未借阅书本</td>
35             </tr>
36         }
37         else
38         {
39             foreach (var keepingBook in Model.Student.KeepingBooks.Where(b=>!b.AppointingDateTime.HasValue))
40             {                
41                 <tr>
42                     <td><input type="checkbox" value="@keepingBook.Book.BarCode" name="barcodes"/></td>
43                     <td>@keepingBook.Book.Name</td>
44                     <td>@keepingBook.Book.BarCode</td>
45                     <td>@Html.DisplayFor(b=>keepingBook.Book.State)</td>
46                     <td>@keepingBook.Book.MatureTime?.ToString("yyyy/MM/dd")</td>
47                     <td>@keepingBook.Book.FetchBookNumber</td>
48                 </tr>
49             }
50         }
51     </table>    
52     <br/>
53     <input type="submit" class="btn-primary btn" value="续借"/>
54 </form>
55 
56 <br />
57 @if (Model.BookingBook != null)
58 {
59     <form asp-action="CancelAppointing">        
60         <table>
61             <tr>
62                 <th>书名</th>
63                 <th>条形码</th>
64                 <th>状态</th>
65                 <th>预约时间</th>
66                 <th>索书号</th>
67             </tr>
68             <book-info book="@Model.BookingBook" is-booking-book="true"></book-info>
69         </table>
70         <br />
71         <input type="hidden" name="barcode" value="@Model.BookingBook.BarCode"/>
72         <input type="submit" value="取消预约" class="btn btn-danger"/>
73     </form>
74 }

 1         [Authorize]
 2         public async Task<IActionResult> Lending(string barcode)
 3         {
 4             Book targetBook=await _lendingInfoDbContext.Books.Include(b=>b.Appointments).FirstOrDefaultAsync(b => b.BarCode == barcode);
 5             if (targetBook==null)
 6             {
 7                 TempData["message"] = "请重新扫描书籍";
 8                 return RedirectToAction("PersonalInfo");
 9             }
10 
11             if (targetBook.Appointments.Any(a=>a.AppointingDateTime.HasValue))
12             {
13                 TempData["message"] = "此书已被预约";
14                 return RedirectToAction("PersonalInfo");
15             }
16 
17             if (targetBook.State==BookState.Readonly)
18             {
19                 TempData["message"] = "此书不供外借";
20                 return RedirectToAction("PersonalInfo");
21             }
22 
23             targetBook.State = BookState.Borrowed;
24             targetBook.BorrowTime = DateTime.Now.Date;
25             targetBook.MatureTime = DateTime.Now.Date+TimeSpan.FromDays(28);
26             StudentInfo student =
27                 await _lendingInfoDbContext.Students.Include(s=>s.KeepingBooks).FirstOrDefaultAsync(s => s.UserName == User.Identity.Name);
28             student.KeepingBooks.Add(new AppointmentOrLending()
29             {
30                 BookId = targetBook.BarCode,
31                 StudentId = student.UserName
32             });
33             await _lendingInfoDbContext.SaveChangesAsync();
34             TempData["message"] = "借书成功";
35             return RedirectToAction("PersonalInfo");
36         }

 1         [Authorize]
 2         [HttpPost]
 3         public async Task<IActionResult> ReBorrow(IEnumerable<string> barcodes)
 4         {
 5             StringBuilder borrowSuccess = new StringBuilder();
 6             StringBuilder borrowFail = new StringBuilder();
 7             borrowSuccess.Append("成功续借书籍:");
 8             borrowFail.Append("续借失败书籍：");
 9             foreach (var barcode in barcodes)
10             {   
11                 Book reBorrowBook = _lendingInfoDbContext.Books.FirstOrDefault(b => b.BarCode == barcode);
12                 if (reBorrowBook != null)
13                 {
14                     if (reBorrowBook.State == BookState.Borrowed && DateTime.Now-reBorrowBook.MatureTime?.Date<=TimeSpan.FromDays(3))
15                     {
16                         reBorrowBook.State = BookState.ReBorrowed;
17                         reBorrowBook.BorrowTime = DateTime.Now.Date;
18                         reBorrowBook.MatureTime = DateTime.Now.Date+TimeSpan.FromDays(28);
19                         borrowSuccess.Append($"《{reBorrowBook.Name}》、");
20                     }
21                     else
22                     {
23                         borrowFail.Append($"《{reBorrowBook.Name}》、");
24                     }
25                 }
26             }
27             borrowSuccess.AppendLine(borrowFail.ToString());
28             await _lendingInfoDbContext.SaveChangesAsync();
29             TempData["message"] = borrowSuccess.ToString();
30             return RedirectToAction("PersonalInfo");
31         }

 1         public async Task<IActionResult> Search(string keyWord, string value)
 2         {
 3             BookDetails bookDetails = new BookDetails();
 4             switch (keyWord)
 5             {
 6                 case "Name":
 7                     bookDetails = await _lendingInfoDbContext.BooksDetail.AsNoTracking().FirstOrDefaultAsync(b => b.Name == value);
 8                     break;
 9                 case "ISBN":
10                     bookDetails = await _lendingInfoDbContext.BooksDetail.AsNoTracking().FirstOrDefaultAsync(b => b.ISBN == value);
11                     break;
12                 case "FetchBookNumber":
13                     bookDetails = await _lendingInfoDbContext.BooksDetail.AsNoTracking().FirstOrDefaultAsync(b => b.FetchBookNumber == value);
14                     break;
15             }
16 
17             if (bookDetails != null)
18             {
19                 if (User.Identity.IsAuthenticated&& User.IsInRole("Admin"))
20                 {
21                     return RedirectToAction("EditBookDetails", new { isbn = bookDetails.ISBN });
22                 }
23                 else
24                 {
25                     return RedirectToAction("Detail", new {isbn = bookDetails.ISBN});
26                 }                
27             }
28 
29             TempData["message"] = "找不到该书籍";
30             return RedirectToAction("BookDetails");
31         }

  1 @using Microsoft.AspNetCore.Http.Extensions
  2 @using Microsoft.AspNetCore.Authorization
  3 @inject IAuthorizationService AuthorizationService
  4 <!DOCTYPE html>
  5 <html>
  6 <head>
  7     <meta charset="utf-8" />
  8     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  9     <title>@ViewData["Title"] - LibraryDemo</title>
 10     <environment include="Development">
 11         <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.css" />
 12         <link rel="stylesheet" href="~/css/site.css" />
 13     </environment>
 14     <environment exclude="Development">
 15         <link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.7/css/bootstrap.min.css"
 16               asp-fallback-href="~/lib/bootstrap/dist/css/bootstrap.min.css"
 17               asp-fallback-test-class="sr-only" asp-fallback-test-property="position" asp-fallback-test-value="absolute" />
 18         <link rel="stylesheet" href="~/css/site.min.css" asp-append-version="true" />
 19     </environment>
 20 </head>
 21 <body>
 22     <nav class="navbar navbar-inverse navbar-fixed-top">
 23         <div class="container">
 24             <div class="navbar-header">
 25                 <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
 26                     <span class="sr-only">Toggle navigation</span>
 27                     <span class="icon-bar"></span>
 28                     <span class="icon-bar"></span>
 29                     <span class="icon-bar"></span>
 30                 </button>
 31                 <a asp-area="" asp-controller="BookInfo" asp-action="Index" class="navbar-brand">LibraryDemo</a>
 32             </div>
 33             <div class="navbar-collapse collapse">
 34                 <ul class="nav navbar-nav">
 35                     <li><a asp-area="" asp-controller="BookInfo" asp-action="Index">首页</a></li>
 36                     <li>
 37                         @if (User.Identity.IsAuthenticated)
 38                         {
 39                             <a asp-controller="BookInfo" asp-action="PersonalInfo">@User.Identity.Name</a>
 40                         }
 41                         else
 42                         {
 43                             <a asp-area="" asp-controller="StudentAccount" asp-action="Login"
 44                                asp-route-returnUrl="@(Context.Request.GetDisplayUrl())">登录</a>
 45                         }
 46                     </li>
 47                     <li><a asp-area="" asp-controller="BookInfo" asp-action="Recommend">推荐图书</a></li>
 48                     <li><a href="mailto:Nanase@cnblogs.com">联系我们</a></li>
 49                     @if (User.Identity.IsAuthenticated)
 50                     {
 51                         <li>
 52                             <a asp-action="Logout" asp-controller="StudentAccount" asp-route-returnUrl="@(Context.Request.GetDisplayUrl())">注销</a>
 53                         </li>
 54                     }
 55                 </ul>
 56             </div>
 57         </div>
 58     </nav>
 59     @if (TempData["message"] != null)
 60     {
 61         <br />
 62         <p class="text-success">@TempData["message"]</p>
 63     }
 64     <br />
 65     <div align="center">
 66         <form action="@Url.Action("Search","BookInfo")">
 67             @Html.DropDownList("keyword",new List<SelectListItem>()
 68             {
 69                 new SelectListItem("书名","Name"),
 70                 new SelectListItem("ISBN","ISBN"),
 71                 new SelectListItem("索书号","FetchBookNumber"),
 72             })
 73             <input type="text" name="value" />
 74             <button type="submit"><span class="glyphicon glyphicon-search"></span></button>
 75         </form>
 76     </div>
 77     <partial name="_CookieConsentPartial" />
 78     <div class="container body-content">
 79 
 80         @RenderBody()
 81         <hr />
 82     </div>
 83 
 84     <div class="container" style="margin-top: 20px;">
 85         <footer>
 86             <p>&copy; 2018 - LibraryDemo</p>
 87         </footer>
 88     </div>
 89     <environment include="Development">
 90         <script src="~/lib/jquery/dist/jquery.js"></script>
 91         <script src="~/lib/bootstrap/dist/js/bootstrap.js"></script>
 92         <script src="~/js/site.js" asp-append-version="true"></script>
 93     </environment>
 94     <environment exclude="Development">
 95         <script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-3.3.1.min.js"
 96                 asp-fallback-src="~/lib/jquery/dist/jquery.min.js"
 97                 asp-fallback-test="window.jQuery"
 98                 crossorigin="anonymous"
 99                 integrity="sha384-tsQFqpEReu7ZLhBV2VZlAu7zcOV+rXbYlF2cqB8txI/8aZajjp4Bqd+V6D5IgvKT"></script>
100         <script src="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.7/bootstrap.min.js"
101                 asp-fallback-src="~/lib/bootstrap/dist/js/bootstrap.min.js"
102                 asp-fallback-test="window.jQuery && window.jQuery.fn && window.jQuery.fn.modal"
103                 crossorigin="anonymous"
104                 integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa"></script>
105         <script src="~/js/site.min.js" asp-append-version="true"></script>
106     </environment>
107     @RenderSection("Scripts", required: false)
108 </body>
109 </html>