[ABP教程]第三章创建、更新和删除图书

Web应用程序开发教程 - 第三章: 创建,更新和删除图书

关于本教程

在本系列教程中, 你将构建一个名为 Acme.BookStore 的用于管理书籍及其作者列表的基于ABP的应用程序. 它是使用以下技术开发的:

{{DB_Text}} 做为ORM提供程序.
{{UI_Value}} 做为UI框架.

本教程分为以下部分:

下载源码

本教程根据你的UI 和 Database偏好有多个版,我们准备了两种可供下载的源码组合:

创建新书籍

通过本节, 你将会了解如何创建一个 modal form 来实现新增书籍的功能. 最终成果如下图所示:

bookstore-create-dialog

在 Acme.BookStore.Web 项目的 Pages/Books 目录下新建一个 CreateModal.cshtml Razor页面:

bookstore-add-create-dialog

CreateModal.cshtml.cs

打开 CreateModal.cshtml.cs 代码文件,用如下代码替换 CreateModalModel 类的实现:

using System.Threading.Tasks;
using Acme.BookStore.Books;
using Microsoft.AspNetCore.Mvc;

namespace Acme.BookStore.Web.Pages.Books
{
    public class CreateModalModel : BookStorePageModel
    {
        [BindProperty]
        public CreateUpdateBookDto Book { get; set; }

        private readonly IBookAppService _bookAppService;

        public CreateModalModel(IBookAppService bookAppService)
        {
            _bookAppService = bookAppService;
        }

        public void OnGet()
        {
            Book = new CreateUpdateBookDto();
        }

        public async Task<IActionResult> OnPostAsync()
        {
            await _bookAppService.CreateAsync(Book);
            return NoContent();
        }
    }
}

该类派生于 BookStorePageModel 而非默认的 PageModel. BookStorePageModel 继承了 PageModel 并且添加了一些可以被你的page model类使用的通用属性和方法.
Book 属性上的 [BindProperty] 特性将post请求提交上来的数据绑定到该属性上.
该类通过构造函数注入了 IBookAppService 应用服务,并且在 OnPostAsync 处理程序中调用了服务的 CreateAsync 方法.
它在 OnGet 方法中创建一个新的 CreateUpdateBookDto 对象。 ASP.NET Core不需要像这样创建一个新实例就可以正常工作. 但是它不会为你创建实例,并且如果你的类在类构造函数中具有一些默认值分配或代码执行,它们将无法工作. 对于这种情况,我们为某些 CreateUpdateBookDto 属性设置了默认值.

CreateModal.cshtml

打开 CreateModal.cshtml 文件并粘贴如下代码:

@page
@using Acme.BookStore.Localization
@using Acme.BookStore.Web.Pages.Books
@using Microsoft.Extensions.Localization
@using Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
@model CreateModalModel
@inject IStringLocalizer<BookStoreResource> L
@{
    Layout = null;
}
<abp-dynamic-form abp-model="Book" asp-page="/Books/CreateModal">
    <abp-modal>
        <abp-modal-header title="@L["NewBook"].Value"></abp-modal-header>
        <abp-modal-body>
            <abp-form-content />
        </abp-modal-body>
        <abp-modal-footer buttons="@(AbpModalButtons.Cancel|AbpModalButtons.Save)"></abp-modal-footer>
    </abp-modal>
</abp-dynamic-form>

这个 modal 使用 abp-dynamic-form tag Helper 根据 CreateBookViewModel 类自动构建了表单.
abp-model 指定了 Book 属性为模型对象.
data-ajaxForm 设置了表单通过AJAX提交,而不是经典的页面回发.
abp-form-content tag helper 作为表单控件渲染位置的占位符 (这是可选的,只有你在 abp-dynamic-form 中像本示例这样添加了其他内容才需要).

提示: 就像在本示例中一样,Layout 应该为 null,因为当通过AJAX加载模态时,我们不希望包括所有布局.

添加 "New book" 按钮

打开 Pages/Books/Index.cshtml 并按如下代码修改 abp-card-header :

<abp-card-header>
    <abp-row>
        <abp-column size-md="_6">
            <abp-card-title>@L["Books"]</abp-card-title>
        </abp-column>
        <abp-column size-md="_6" class="text-right">
            <abp-button id="NewBookButton"
                        text="@L["NewBook"].Value"
                        icon="plus"
                        button-type="Primary"/>
        </abp-column>
    </abp-row>
</abp-card-header>

Index.cshtml 的内容最终如下所示:

@page
@using Acme.BookStore.Localization
@using Acme.BookStore.Web.Pages.Books
@using Microsoft.Extensions.Localization
@model IndexModel
@inject IStringLocalizer<BookStoreResource> L
@section scripts
{
    <abp-script src="/Pages/Books/Index.js"/>
}

<abp-card>
    <abp-card-header>
        <abp-row>
            <abp-column size-md="_6">
                <abp-card-title>@L["Books"]</abp-card-title>
            </abp-column>
            <abp-column size-md="_6" class="text-right">
                <abp-button id="NewBookButton"
                            text="@L["NewBook"].Value"
                            icon="plus"
                            button-type="Primary"/>
            </abp-column>
        </abp-row>
    </abp-card-header>
    <abp-card-body>
        <abp-table striped-rows="true" id="BooksTable"></abp-table>
    </abp-card-body>
</abp-card>

如下图所示,只是在表格 右上方 添加了 New book 按钮:

打开 Pages/book/index.js 在 datatable 配置代码后面添加如下代码:

var createModal = new abp.ModalManager(abp.appPath + 'Books/CreateModal');

createModal.onResult(function () {
    dataTable.ajax.reload();
});

$('#NewBookButton').click(function (e) {
    e.preventDefault();
    createModal.open();
});

abp.ModalManager 是一个在客户端打开和管理modal的辅助类.它基于Twitter Bootstrap的标准modal组件通过简化的API抽象隐藏了许多细节.
createModal.onResult(...) 用于在创建书籍后刷新数据表格.
createModal.open(); 用于打开模态创建新书籍.

Index.js 的内容最终如下所示:

$(function () {
    var l = abp.localization.getResource('BookStore');

    var dataTable = $('#BooksTable').DataTable(
        abp.libs.datatables.normalizeConfiguration({
            serverSide: true,
            paging: true,
            order: [[1, "asc"]],
            searching: false,
            scrollX: true,
            ajax: abp.libs.datatables.createAjax(acme.bookStore.books.book.getList),
            columnDefs: [
                {
                    title: l('Name'),
                    data: "name"
                },
                {
                    title: l('Type'),
                    data: "type",
                    render: function (data) {
                        return l('Enum:BookType:' + data);
                    }
                },
                {
                    title: l('PublishDate'),
                    data: "publishDate",
                    render: function (data) {
                        return luxon
                            .DateTime
                            .fromISO(data, {
                                locale: abp.localization.currentCulture.name
                            }).toLocaleString();
                    }
                },
                {
                    title: l('Price'),
                    data: "price"
                },
                {
                    title: l('CreationTime'), data: "creationTime",
                    render: function (data) {
                        return luxon
                            .DateTime
                            .fromISO(data, {
                                locale: abp.localization.currentCulture.name
                            }).toLocaleString(luxon.DateTime.DATETIME_SHORT);
                    }
                }
            ]
        })
    );

    var createModal = new abp.ModalManager(abp.appPath + 'Books/CreateModal');

    createModal.onResult(function () {
        dataTable.ajax.reload();
    });

    $('#NewBookButton').click(function (e) {
        e.preventDefault();
        createModal.open();
    });
});

现在,你可以 运行程序 通过新的 modal form 来创建书籍了.

更新书籍

在 Acme.BookStore.Web 项目的 Pages/Books 目录下新建一个名叫 EditModal.cshtml 的Razor页面:

bookstore-add-edit-dialog

EditModal.cshtml.cs

打开 EditModal.cshtml.cs 文件(EditModalModel类) 并替换成以下代码:

using System;
using System.Threading.Tasks;
using Acme.BookStore.Books;
using Microsoft.AspNetCore.Mvc;

namespace Acme.BookStore.Web.Pages.Books
{
    public class EditModalModel : BookStorePageModel
    {
        [HiddenInput]
        [BindProperty(SupportsGet = true)]
        public Guid Id { get; set; }

        [BindProperty]
        public CreateUpdateBookDto Book { get; set; }

        private readonly IBookAppService _bookAppService;

        public EditModalModel(IBookAppService bookAppService)
        {
            _bookAppService = bookAppService;
        }

        public async Task OnGetAsync()
        {
            var bookDto = await _bookAppService.GetAsync(Id);
            Book = ObjectMapper.Map<BookDto, CreateUpdateBookDto>(bookDto);
        }

        public async Task<IActionResult> OnPostAsync()
        {
            await _bookAppService.UpdateAsync(Id, Book);
            return NoContent();
        }
    }
}

[HiddenInput] 和 [BindProperty] 是标准的 ASP.NET Core MVC 特性.这里启用 SupportsGet 从Http请求的查询字符串中获取Id的值.
在 OnGetAsync 方法中,将 BookAppService.GetAsync 方法返回的 BookDto 映射成 CreateUpdateBookDto 并赋值给Book属性.
OnPostAsync 方法直接使用 BookAppService.UpdateAsync 来更新实体.

BookDto 到 CreateUpdateBookDto 对象映射

为了执行 BookDto 到 CreateUpdateBookDto 对象映射,请打开 Acme.BookStore.Web 项目中的 BookStoreWebAutoMapperProfile.cs 并更改它,如下所示:

using AutoMapper;

namespace Acme.BookStore.Web
{
    public class BookStoreWebAutoMapperProfile : Profile
    {
        public BookStoreWebAutoMapperProfile()
        {
            CreateMap<BookDto, CreateUpdateBookDto>();
        }
    }
}

我们添加了 CreateMap<BookDto, CreateUpdateBookDto>(); 作为映射定义.

请注意,我们在Web层中进行映射定义是一种最佳实践,因为仅在该层中需要它.

EditModal.cshtml

将 EditModal.cshtml 页面内容替换成如下代码:

@page
@using Acme.BookStore.Localization
@using Acme.BookStore.Web.Pages.Books
@using Microsoft.Extensions.Localization
@using Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
@model EditModalModel
@inject IStringLocalizer<BookStoreResource> L
@{
    Layout = null;
}
<abp-dynamic-form abp-model="Book" asp-page="/Books/EditModal">
    <abp-modal>
        <abp-modal-header title="@L["Update"].Value"></abp-modal-header>
        <abp-modal-body>
            <abp-input asp-for="Id" />
            <abp-form-content />
        </abp-modal-body>
        <abp-modal-footer buttons="@(AbpModalButtons.Cancel|AbpModalButtons.Save)"></abp-modal-footer>
    </abp-modal>
</abp-dynamic-form>

这个页面内容和 CreateModal.cshtml 非常相似,除了以下几点:

它包含id属性的abp-input, 用于存储编辑书的 id (它是隐藏的Input)
此页面指定的post地址是Books/EditModal.

为表格添加 "操作（Actions）" 下拉菜单

我们将为表格每行添加下拉按钮 ("Actions"):

打开 Pages/Books/Index.cshtml 页面,并按下方所示修改表格部分的代码:

$(function () {
    var l = abp.localization.getResource('BookStore');
    var createModal = new abp.ModalManager(abp.appPath + 'Books/CreateModal');
    var editModal = new abp.ModalManager(abp.appPath + 'Books/EditModal');

    var dataTable = $('#BooksTable').DataTable(
        abp.libs.datatables.normalizeConfiguration({
            serverSide: true,
            paging: true,
            order: [[1, "asc"]],
            searching: false,
            scrollX: true,
            ajax: abp.libs.datatables.createAjax(acme.bookStore.books.book.getList),
            columnDefs: [
                {
                    title: l('Actions'),
                    rowAction: {
                        items:
                            [
                                {
                                    text: l('Edit'),
                                    action: function (data) {
                                        editModal.open({ id: data.record.id });
                                    }
                                }
                            ]
                    }
                },
                {
                    title: l('Name'),
                    data: "name"
                },
                {
                    title: l('Type'),
                    data: "type",
                    render: function (data) {
                        return l('Enum:BookType:' + data);
                    }
                },
                {
                    title: l('PublishDate'),
                    data: "publishDate",
                    render: function (data) {
                        return luxon
                            .DateTime
                            .fromISO(data, {
                                locale: abp.localization.currentCulture.name
                            }).toLocaleString();
                    }
                },
                {
                    title: l('Price'),
                    data: "price"
                },
                {
                    title: l('CreationTime'), data: "creationTime",
                    render: function (data) {
                        return luxon
                            .DateTime
                            .fromISO(data, {
                                locale: abp.localization.currentCulture.name
                            }).toLocaleString(luxon.DateTime.DATETIME_SHORT);
                    }
                }
            ]
        })
    );

    createModal.onResult(function () {
        dataTable.ajax.reload();
    });

    editModal.onResult(function () {
        dataTable.ajax.reload();
    });

    $('#NewBookButton').click(function (e) {
        e.preventDefault();
        createModal.open();
    });
});

增加了一个新的 ModalManager 名为 editModal 打开编辑模态框.
在 columnDefs 部分的开头添加了一个新列,用于"Actions"下拉按钮.
"Edit" 动作简单地调用 editModal.open() 打开编辑模态框.
editModal.onResult(...) 当你关闭编程模态框时进行回调刷新数据表格.

你可以运行应用程序,并通过选择一本书的编辑操作编辑任何一本书.

最终的UI看起来如下:

删除书籍

打开 Pages/book/index.js 文件,在 rowAction items 下新增一项:

{
    text: l('Delete'),
    confirmMessage: function (data) {
        return l('BookDeletionConfirmationMessage', data.record.name);
    },
    action: function (data) {
        acme.bookStore.books.book
            .delete(data.record.id)
            .then(function() {
                abp.notify.info(l('SuccessfullyDeleted'));
                dataTable.ajax.reload();
            });
    }
}

confirmMessage 用来在实际执行 action 之前向用户进行确认.
通过javascript代理方法 acme.bookStore.books.book.delete(...) 执行一个AJAX请求来删除一个book实体.
abp.notify.info 用来在执行删除操作后显示一个toastr通知信息.

由于我们使用了两个新的本地化文本(BookDeletionConfirmationMessage和SuccesslyDeleted),因此你需要将它们添加到本地化文件(Acme.BookStore.Domain.Shared项目的Localization/BookStore文件夹下的en.json):

"BookDeletionConfirmationMessage": "Are you sure to delete the book '{0}'?",
"SuccessfullyDeleted": "Successfully deleted!"

Index.js 的内容最终如下所示:

$(function () {
    var l = abp.localization.getResource('BookStore');
    var createModal = new abp.ModalManager(abp.appPath + 'Books/CreateModal');
    var editModal = new abp.ModalManager(abp.appPath + 'Books/EditModal');

    var dataTable = $('#BooksTable').DataTable(
        abp.libs.datatables.normalizeConfiguration({
            serverSide: true,
            paging: true,
            order: [[1, "asc"]],
            searching: false,
            scrollX: true,
            ajax: abp.libs.datatables.createAjax(acme.bookStore.books.book.getList),
            columnDefs: [
                {
                    title: l('Actions'),
                    rowAction: {
                        items:
                            [
                                {
                                    text: l('Edit'),
                                    action: function (data) {
                                        editModal.open({ id: data.record.id });
                                    }
                                },
                                {
                                    text: l('Delete'),
                                    confirmMessage: function (data) {
                                        return l(
                                            'BookDeletionConfirmationMessage',
                                            data.record.name
                                        );
                                    },
                                    action: function (data) {
                                        acme.bookStore.books.book
                                            .delete(data.record.id)
                                            .then(function() {
                                                abp.notify.info(
                                                    l('SuccessfullyDeleted')
                                                );
                                                dataTable.ajax.reload();
                                            });
                                    }
                                }
                            ]
                    }
                },
                {
                    title: l('Name'),
                    data: "name"
                },
                {
                    title: l('Type'),
                    data: "type",
                    render: function (data) {
                        return l('Enum:BookType:' + data);
                    }
                },
                {
                    title: l('PublishDate'),
                    data: "publishDate",
                    render: function (data) {
                        return luxon
                            .DateTime
                            .fromISO(data, {
                                locale: abp.localization.currentCulture.name
                            }).toLocaleString();
                    }
                },
                {
                    title: l('Price'),
                    data: "price"
                },
                {
                    title: l('CreationTime'), data: "creationTime",
                    render: function (data) {
                        return luxon
                            .DateTime
                            .fromISO(data, {
                                locale: abp.localization.currentCulture.name
                            }).toLocaleString(luxon.DateTime.DATETIME_SHORT);
                    }
                }
            ]
        })
    );

    createModal.onResult(function () {
        dataTable.ajax.reload();
    });

    editModal.onResult(function () {
        dataTable.ajax.reload();
    });

    $('#NewBookButton').click(function (e) {
        e.preventDefault();
        createModal.open();
    });
});

你可以运行程序并尝试删除一本书.

创建新书籍

下面的章节中,你将学习到如何创建一个新的模态对话框来新增书籍.

BookComponent

打开 /src/app/book/book.component.ts 使用以下内容替换:

import { ListService, PagedResultDto } from '@abp/ng.core';
import { Component, OnInit } from '@angular/core';
import { BookDto } from './models';
import { BookService } from './services';

@Component({
  selector: 'app-book',
  templateUrl: './book.component.html',
  styleUrls: ['./book.component.scss'],
  providers: [ListService],
})
export class BookComponent implements OnInit {
  book = { items: [], totalCount: 0 } as PagedResultDto<BookDto>;

  isModalOpen = false; // add this line

  constructor(public readonly list: ListService, private bookService: BookService) {}

  ngOnInit() {
    const bookStreamCreator = (query) => this.bookService.getListByInput(query);

    this.list.hookToQuery(bookStreamCreator).subscribe((response) => {
      this.book = response;
    });
  }

  // add new method
  createBook() {
    this.isModalOpen = true;
  }
}

我们定义了一个名为 isModalOpen 的变量和 createBook 方法.

打开 /src/app/book/book.component.html 做以下更改:

<div class="card">
  <div class="card-header">
    <div class="row">
      <div class="col col-md-6">
        <h5 class="card-title">{%{{{ '::Menu:Books' | abpLocalization }}}%}</h5>
      </div>        
      <div class="text-right col col-md-6">
          
        <!-- Add the "new book" button here -->
        <div class="text-lg-right pt-2">
          <button id="create" class="btn btn-primary" type="button" (click)="createBook()">
            <i class="fa fa-plus mr-1"></i>
            <span>{%{{{ "::NewBook" | abpLocalization }}}%}</span>
          </button>
        </div>
          
      </div>
    </div>
  </div>
  <div class="card-body">
    <!-- ngx-datatable should be here! -->
  </div>
</div>

<!-- Add the modal here -->
<abp-modal [(visible)]="isModalOpen">
  <ng-template #abpHeader>
    <h3>{%{{{ '::NewBook' | abpLocalization }}}%}</h3>
  </ng-template>

  <ng-template #abpBody> </ng-template>

  <ng-template #abpFooter>
    <button type="button" class="btn btn-secondary" #abpClose>
      {%{{{ '::Close' | abpLocalization }}}%}
    </button>
  </ng-template>
</abp-modal>

添加了 New book 按钮到卡片头部.
添加了 abp-modal 渲染模态框,允许用户创建新书. abp-modal 是显示模态框的预构建组件. 你也可以使用其它方法显示模态框,但 abp-modal 提供了一些附加的好处.

你可以打开浏览器,点击New book按钮看到模态框.

Empty modal for new book

添加响应式表单

响应式表单提供一种模型驱动的方法来处理其值随时间变化的表单输入.

打开 /src/app/book/book.component.ts 使用以下内容替换:

import { ListService, PagedResultDto } from '@abp/ng.core';
import { Component, OnInit } from '@angular/core';
import { BookDto, BookType } from './models'; // add BookType
import { BookService } from './services';
import { FormGroup, FormBuilder, Validators } from '@angular/forms'; // add this

@Component({
  selector: 'app-book',
  templateUrl: './book.component.html',
  styleUrls: ['./book.component.scss'],
  providers: [ListService],
})
export class BookComponent implements OnInit {
  book = { items: [], totalCount: 0 } as PagedResultDto<BookDto>;

  form: FormGroup; // add this line

  bookType = BookType; // add this line

  // add bookTypes as a list of BookType enum members
  bookTypes = Object.keys(this.bookType).filter(
    (key) => typeof this.bookType[key] === 'number'
  );

  isModalOpen = false;

  constructor(
    public readonly list: ListService,
    private bookService: BookService,
    private fb: FormBuilder // inject FormBuilder
  ) {}

  ngOnInit() {
    const bookStreamCreator = (query) => this.bookService.getListByInput(query);

    this.list.hookToQuery(bookStreamCreator).subscribe((response) => {
      this.book = response;
    });
  }

  createBook() {
    this.buildForm(); // add this line
    this.isModalOpen = true;
  }

  // add buildForm method
  buildForm() {
    this.form = this.fb.group({
      name: ['', Validators.required],
      type: [null, Validators.required],
      publishDate: [null, Validators.required],
      price: [null, Validators.required],
    });
  }

  // add save method
  save() {
    if (this.form.invalid) {
      return;
    }

    this.bookService.createByInput(this.form.value).subscribe(() => {
      this.isModalOpen = false;
      this.form.reset();
      this.list.get();
    });
  }
}

导入了 FormGroup, FormBuilder and Validators.
添加了 form: FormGroup 变量.
添加了 bookType 属性,你可以从模板中获取 BookType 枚举成员.
添加了 bookTypes 属性作为 BookType 枚举成员列表. 将在表单选项中使用.
我们注入了 fb: FormBuilder 服务到构造函数. FormBuilder 服务为生成控件提供了方便的方法. 它减少了构建复杂表单所需的样板文件的数量.
我们添加了 buildForm 方法到文件末尾, 在 createBook 方法调用 buildForm() 方法. 该方法创建一个响应式表单去创建新书.
添加了save 方法.

打开 /src/app/book/book.component.html,使用以下内容替换 <ng-template #abpBody> </ng-template>:

<ng-template #abpBody>
  <form [formGroup]="form" (ngSubmit)="save()">
    <div class="form-group">
      <label for="book-name">Name</label><span> * </span>
      <input type="text" id="book-name" class="form-control" formControlName="name" autofocus />
    </div>

    <div class="form-group">
      <label for="book-price">Price</label><span> * </span>
      <input type="number" id="book-price" class="form-control" formControlName="price" />
    </div>

    <div class="form-group">
      <label for="book-type">Type</label><span> * </span>
      <select class="form-control" id="book-type" formControlName="type">
        <option [ngValue]="null">Select a book type</option>
        <option [ngValue]="bookType[type]" *ngFor="let type of bookTypes"> {%{{{ type }}}%}</option>
      </select>
    </div>

    <div class="form-group">
      <label>Publish date</label><span> * </span>
      <input
        #datepicker="ngbDatepicker"
        class="form-control"
        name="datepicker"
        formControlName="publishDate"
        ngbDatepicker
        (click)="datepicker.toggle()"
      />
    </div>
  </form>
</ng-template>

同时使用下面的代码部分替换 <ng-template #abpFooter> </ng-template>:

<ng-template #abpFooter>
  <button type="button" class="btn btn-secondary" #abpClose>
      {%{{{ '::Close' | abpLocalization }}}%}
  </button>

  <!--added save button-->
  <button class="btn btn-primary" (click)="save()" [disabled]="form.invalid">
        <i class="fa fa-check mr-1"></i>
        {%{{{ '::Save' | abpLocalization }}}%}
  </button>
</ng-template>

Datepicker

我们在这个组件中使用了NgBootstrap datepicker. 因此需要添加与此组件相关的依赖项.

打开 /src/app/book/book.module.ts 使用以下内容替换:

import { NgModule } from '@angular/core';
import { SharedModule } from '../shared/shared.module';
import { BookRoutingModule } from './book-routing.module';
import { BookComponent } from './book.component';
import { NgbDatepickerModule } from '@ng-bootstrap/ng-bootstrap'; // add this line

@NgModule({
  declarations: [BookComponent],
  imports: [
    BookRoutingModule,
    SharedModule,
    NgbDatepickerModule, // add this line
  ]
})
export class BookModule { }

我们导入了 NgbDatepickerModule 来使用日期选择器.

打开 /src/app/book/book.component.ts 使用以内内容替换:

import { ListService, PagedResultDto } from '@abp/ng.core';
import { Component, OnInit } from '@angular/core';
import { BookDto, BookType } from './models';
import { BookService } from './services';
import { FormGroup, FormBuilder, Validators } from '@angular/forms';

// added this line
import { NgbDateNativeAdapter, NgbDateAdapter } from '@ng-bootstrap/ng-bootstrap';

@Component({
  selector: 'app-book',
  templateUrl: './book.component.html',
  styleUrls: ['./book.component.scss'],
  providers: [
    ListService,
    { provide: NgbDateAdapter, useClass: NgbDateNativeAdapter } // add this line
  ],
})
export class BookComponent implements OnInit {
  book = { items: [], totalCount: 0 } as PagedResultDto<BookDto>;

  form: FormGroup;

  bookType = BookType;

  bookTypes = Object.keys(this.bookType).filter(
    (key) => typeof this.bookType[key] === 'number'
  );

  isModalOpen = false;

  constructor(
    public readonly list: ListService,
    private bookService: BookService,
    private fb: FormBuilder
  ) {}

  ngOnInit() {
    const bookStreamCreator = (query) => this.bookService.getListByInput(query);

    this.list.hookToQuery(bookStreamCreator).subscribe((response) => {
      this.book = response;
    });
  }

  createBook() {
    this.buildForm();
    this.isModalOpen = true;
  }

  buildForm() {
    this.form = this.fb.group({
      name: ['', Validators.required],
      type: [null, Validators.required],
      publishDate: [null, Validators.required],
      price: [null, Validators.required],
    });
  }

  save() {
    if (this.form.invalid) {
      return;
    }

    this.bookService.createByInput(this.form.value).subscribe(() => {
      this.isModalOpen = false;
      this.form.reset();
      this.list.get();
    });
  }
}

导入了 NgbDateNativeAdapter 和 NgbDateAdapter.
我们添加了一个新的 NgbDateAdapter 提供程序,它将Datepicker值转换为 Date 类型. 有关更多详细信息,请参见datepicker adapters.

现在你可以打开浏览器看到以下变化:

Save button to the modal

更新书籍

打开 /src/app/book/book.component.ts 使用以下内容替换:

import { ListService, PagedResultDto } from '@abp/ng.core';
import { Component, OnInit } from '@angular/core';
import { BookDto, BookType, CreateUpdateBookDto } from './models';
import { BookService } from './services';
import { FormGroup, FormBuilder, Validators } from '@angular/forms';
import { NgbDateNativeAdapter, NgbDateAdapter } from '@ng-bootstrap/ng-bootstrap';

@Component({
  selector: 'app-book',
  templateUrl: './book.component.html',
  styleUrls: ['./book.component.scss'],
  providers: [ListService, { provide: NgbDateAdapter, useClass: NgbDateNativeAdapter }],
})
export class BookComponent implements OnInit {
  book = { items: [], totalCount: 0 } as PagedResultDto<BookDto>;

  selectedBook = new BookDto(); // declare selectedBook

  form: FormGroup;

  bookType = BookType;

  bookTypes = Object.keys(this.bookType).filter(
    (key) => typeof this.bookType[key] === 'number'
  );

  isModalOpen = false;

  constructor(
    public readonly list: ListService,
    private bookService: BookService,
    private fb: FormBuilder
  ) {}

  ngOnInit() {
    const bookStreamCreator = (query) => this.bookService.getListByInput(query);

    this.list.hookToQuery(bookStreamCreator).subscribe((response) => {
      this.book = response;
    });
  }

  createBook() {
    this.selectedBook = new BookDto(); // reset the selected book
    this.buildForm();
    this.isModalOpen = true;
  }

  // Add editBook method
  editBook(id: string) {
    this.bookService.getById(id).subscribe((book) => {
      this.selectedBook = book;
      this.buildForm();
      this.isModalOpen = true;
    });
  }

  buildForm() {
    this.form = this.fb.group({
      name: [this.selectedBook.name || '', Validators.required],
      type: [this.selectedBook.type || null, Validators.required],
      publishDate: [
        this.selectedBook.publishDate ? new Date(this.selectedBook.publishDate) : null,
        Validators.required,
      ],
      price: [this.selectedBook.price || null, Validators.required],
    });
  }

  // change the save method
  save() {
    if (this.form.invalid) {
      return;
    }

    const request = this.selectedBook.id
      ? this.bookService.updateByIdAndInput(this.form.value, this.selectedBook.id)
      : this.bookService.createByInput(this.form.value);

    request.subscribe(() => {
      this.isModalOpen = false;
      this.form.reset();
      this.list.get();
    });
  }
}

我们声明了类型为 BookDto 的 selectedBook 变量.
我们添加了 editBook 方法, 根据给定图书 Id 设置 selectedBook 对象.
我们替换了 buildForm 方法使用 selectedBook 数据创建表单.
我们替换了 createBook 方法,设置 selectedBook 为空对象.
我们替换了 save 方法.

添加 "Actions" 下拉框到表格

打开 /src/app/book/book.component.html 在 ngx-datatable 第一列添加 ngx-datatable-column 定义:

<ngx-datatable-column
  [name]="'::Actions' | abpLocalization"
  [maxWidth]="150"
  [sortable]="false"
>
  <ng-template let-row="row" ngx-datatable-cell-template>
    <div ngbDropdown container="body" class="d-inline-block">
      <button
        class="btn btn-primary btn-sm dropdown-toggle"
        data-toggle="dropdown"
        aria-haspopup="true"
        ngbDropdownToggle
      >
        <i class="fa fa-cog mr-1"></i>{%{{{ '::Actions' | abpLocalization }}}%}
      </button>
      <div ngbDropdownMenu>
        <button ngbDropdownItem (click)="editBook(row.id)">
          {%{{{ '::Edit' | abpLocalization }}}%}
        </button>
      </div>
    </div>
  </ng-template>
</ngx-datatable-column>

在表格的第一列添加了一个 "Actions" 下拉菜单,如下图所示:

Action buttons

同时如下所示更改 ng-template #abpHeader 部分:

<ng-template #abpHeader>
    <h3>{%{{{ (selectedBook.id ? '::Edit' : '::NewBook' ) | abpLocalization }}}%}</h3>
</ng-template>

模板将在标题中显示 Edit 文本用于编辑记录操作, New Book 用于添加新记录操作.

删除书籍

打开 /src/app/book/book.component.ts 注入 ConfirmationService.

所示替换构造函数:

// ...

// add new imports
import { ConfirmationService, Confirmation } from '@abp/ng.theme.shared';

//change the constructor
constructor(
  public readonly list: ListService,
  private bookService: BookService,
  private fb: FormBuilder,
  private confirmation: ConfirmationService // inject the ConfirmationService
) {}

// Add a delete method
delete(id: string) {
  this.confirmation.warn('::AreYouSureToDelete', '::AreYouSure').subscribe((status) => {
    if (status === Confirmation.Status.confirm) {
      this.bookService.deleteById(id).subscribe(() => this.list.get());
    }
  });
}

我们注入了 ConfirmationService.
我们注入了 ConfirmationService 到构造函数.
添加了 delete 方法.

参阅确认弹层文档了解该服务的更多信息.

添加删除按钮:

打开 /src/app/book/book.component.html 修改 ngbDropdownMenu 添加删除按钮:

<div ngbDropdownMenu>
  <!-- add the Delete button -->
    <button ngbDropdownItem (click)="delete(row.id)">
        {%{{{ '::Delete' | abpLocalization }}}%}
    </button>
</div>

最终操作下拉框UI看起来如下:

bookstore-final-actions-dropdown

点击 delete 动作调用 delete 方法,然后无法显示一个确认弹层如下图所示.

bookstore-confirmation-popup

查看本教程的下一章.

相关阅读:
看书笔记《python基础》__1
MQTT
杂记
 类型转化
 soc
时钟同步
 设置地址
 清理日志
 pandas_matplot_seaborn
Qt_Quick开发实战精解_4
原文地址：https://www.cnblogs.com/LandWind/p/abp-tutorial-part-3.html

[ABP教程]第三章 创建、更新和删除图书

Web应用程序开发教程 - 第三章: 创建,更新和删除图书

关于本教程

下载源码

创建新书籍

创建 modal form

CreateModal.cshtml.cs

CreateModal.cshtml

添加 "New book" 按钮

更新书籍

EditModal.cshtml.cs

BookDto 到 CreateUpdateBookDto 对象映射

EditModal.cshtml

为表格添加 "操作（Actions）" 下拉菜单

删除书籍

创建新书籍

BookComponent

添加响应式表单

Datepicker

更新书籍

添加 "Actions" 下拉框到表格

删除书籍

添加删除按钮:

下一章

[ABP教程]第三章创建、更新和删除图书