记开发个人图书收藏清单小程序开发（九）Web开发——新增图书信息

书房信息初始化已完成，现在开始处理图书信息新增功能。

主要是实现之前New Razor Pages的后台部分。

新增需要保存的Model：Book.InitSpec.cs

/Models/Book.InitSpec.cs

 1 using System.Collections.Generic;
 2 
 3 namespace PTager.BL
 4 {
 5     public partial class Book
 6     {
 7         public class InitSpec
 8         {
 9             public string Title { get; set; }
10             public string Subtitle { get; set; }
11             public IEnumerable<string> Author { get; set; }
12             public IEnumerable<string> Translator { get; set; }
13             public string Isbn13 { get; set; }
14             public string Isbn10 { get; set; }
15             public string AuthorIntro { get; set; }
16             public string Summary { get; set; }
17             public string Publisher { get; set; }
18             public string Binding { get; set; }
19             public string OriginTitle { get; set; }
20             public int Pages { get; set; }
21             public string ImageUrl { get; set; }
22             public string Pubdate { get; set; }
23             public string Catalog { get; set; }
24             public IEnumerable<string> Tags { get; set; }
25         }
26     }
27 }

实现Post请求部分：

/Pages/Shelves/New.cshtml.cs

 1 namespace PTager.BL.WebUI.Pages.Shelves
 2 {
 3     using M = Book;
 4     public class NewModel : PageModel
 5     {
 6         private readonly IHostingEnvironment _env;
 7         private readonly string _savePath;
 8         private readonly string _relativePath;
 9         public NewModel(IHostingEnvironment env)
10         {
11             _env = env;
12             _relativePath = Path.Combine("App_Data", "Images/Books", DateTime.Today.ToString("yyyy-MM-dd"));
13             _savePath = Path.Combine(_env.ContentRootPath, _relativePath);
14         }
15 
16         [BindProperty]
17         public string IsbnNbr { get; set; }
18         public DoubanBookModel DoubanBook { get; set; }
19 
20         public async Task OnGetAsync(string isbn){...//查看之前的博客}
21         public async Task<IActionResult> OnPostAsync()
22         {
23             if (validIsbnNbr(IsbnNbr))
24             {
25                 DoubanBook = await getDoubanBook();
26                 if (DoubanBook != null)
27                 {
28                     var extention = Path.GetExtension(DoubanBook.image);
29                     var fileName = Guid.NewGuid().ToString() + (string.IsNullOrEmpty(extention) ? ".jpeg" : extention);
30                     await saveImageAsync(fileName, DoubanBook.image);
31                     var spec = new M.InitSpec
32                     {
33                         Author = DoubanBook.author,
34                         AuthorIntro = DoubanBook.author_intro,
35                         Binding = DoubanBook.binding,
36                         Catalog = DoubanBook.catalog,
37                         ImageUrl = Path.Combine(_relativePath, fileName),
38                         Isbn10 = DoubanBook.isbn10,
39                         Isbn13 = DoubanBook.isbn13,
40                         OriginTitle = DoubanBook.origin_title,
41                         Pages = DoubanBook.pages,
42                         Pubdate = DoubanBook.pubdate,
43                         Publisher = DoubanBook.publisher,
44                         Subtitle = DoubanBook.subtitle,
45                         Summary = DoubanBook.summary,
46                         Tags = DoubanBook.tags.Select(x => x.name),
47                         Title = DoubanBook.title,
48                         Translator = DoubanBook.translator
49                     };
50                 }
51             }
52             return Page();
53         }
54         private async Task saveImageAsync(string fileName, string url)
55         {
56             using (var httpClient = new HttpClient())
57             {
58                 var responseStream = await httpClient.GetStreamAsync(url);
59                 var savePath = Path.Combine(_savePath, fileName);
60                 var stream = new FileStream(savePath, FileMode.Create);
61                 byte[] bArr = new byte[1024];
62                 int size = responseStream.Read(bArr, 0, bArr.Length);
63                 while (size > 0)
64                 {
65                     stream.Write(bArr, 0, size);
66                     size = responseStream.Read(bArr, 0, bArr.Length);
67                 }
68                 stream.Close();
69                 responseStream.Close();
70             }
71         }
72         private async Task<DoubanBookModel> getDoubanBook(){...//查看之前的博客}
73         public async Task<string> HttpGetAsync(string url, Encoding encoding = null){...//查看之前的博客}
74 
75         private bool validIsbnNbr(string isbn){...//查看之前的博客}
76     }
77 }

新增IBookRepo和BookRepo：

/Repos/IBookRepo.cs

 1 using System.Threading.Tasks;
 2 
 3 namespace PTager.BL
 4 {
 5     using M = Book;
 6     public interface IBookRepo
 7     {
 8         Task InitAsync(M.InitSpec spec);
 9     }
10 }

/Repos/BookRepo.cs

 1 using System.Threading.Tasks;
 2 using PTager.BL.Data.Store;
 3 
 4 namespace PTager.BL.Data.Repos
 5 {
 6     using M = Book;
 7     public class BookRepo : RepoBase, IBookRepo
 8     {
 9         public BookRepo(BLDbContext context) : base(context)
10         {
11         }
12 
13         public async Task InitAsync(M.InitSpec spec)
14             => await _context.Book_Init(spec.ToJson());
15     }
16 }

/Store/BLDbContext.cs

1         public async Task Book_Init(string json)
2             => await this.ExecuteMethodCallAsync(nameof(Book_Init), args: json);