abp/docs/en/Tutorials/Part-2.md

Web Application Development Tutorial - Part 2: The Book List Page

//[doc-params]
{
    "UI": ["MVC","NG"],
    "DB": ["EF","Mongo"]
}

{{ if UI == "MVC" UI_Text="mvc" else if UI == "NG" UI_Text="angular" else UI_Text="?" end if DB == "EF" DB_Text="Entity Framework Core" else if DB == "Mongo" DB_Text="MongoDB" else DB_Text="?" end }}

About This Tutorial

In this tutorial series, you will build an ABP based web application named Acme.BookStore. This application is used to manage a list of books and their authors. It is developed using the following technologies:

• {{DB_Text}} as the ORM provider.
• {{UI_Value}} as the UI Framework.

This tutorial is organized as the following parts;

• Part 1: Creating the server side
• Part 2: The book list page (this part)
• Part 3: Creating, updating and deleting books
• Part 4: Integration tests
• Part 5: Authorization
• Part 6: Authors: Domain layer
• Part 7: Authors: Database Integration
• Part 8: Authors: Application Layer
• Part 9: Authors: User Interface
• Part 10: Book to Author Relation

Download the Source Code

This tutorial has multiple versions based on your UI and Database preferences. We've prepared two combinations of the source code to be downloaded:

• MVC (Razor Pages) UI with EF Core
• Angular UI with MongoDB

{{if UI == "MVC" && DB == "EF"}}

Video Tutorial

This part is also recorded as a video tutorial and published on YouTube.

{{end}}

{{if UI == "MVC"}}

Dynamic JavaScript Proxies

It's common to call the HTTP API endpoints via AJAX from the JavaScript side. You can use $.ajax or another tool to call the endpoints. However, ABP offers a better way.

ABP dynamically creates JavaScript Proxies for all API endpoints. So, you can use any endpoint just like calling a JavaScript function.

Testing in the Developer Console

You can easily test the JavaScript proxies using your favorite browser's Developer Console. Run the application, open your browser's developer tools (shortcut is generally F12), switch to the Console tab, type the following code and press enter:

acme.bookStore.books.book.getList({}).done(function (result) { console.log(result); });

• acme.bookStore.books is the namespace of the BookAppService converted to camelCase.
• book is the conventional name for the BookAppService (removed AppService postfix and converted to camelCase).
• getList is the conventional name for the GetListAsync method defined in the CrudAppService base class (removed Async postfix and converted to camelCase).
• {} argument is used to send an empty object to the GetListAsync method which normally expects an object of type PagedAndSortedResultRequestDto that is used to send paging and sorting options to the server (all properties are optional with default values, so you can send an empty object).
• getList function returns a promise. You can pass a callback to the then (or done) function to get the result returned from the server.

Running this code produces the following output:

You can see the book list returned from the server. You can also check the network tab of the developer tools to see the client to server communication:

Let's create a new book using the create function:

acme.bookStore.books.book.create({ 
        name: 'Foundation', 
        type: 7, 
        publishDate: '1951-05-24', 
        price: 21.5 
    }).then(function (result) { 
        console.log('successfully created the book with id: ' + result.id); 
    });

You should see a message in the console something like that:

successfully created the book with id: 439b0ea8-923e-8e1e-5d97-39f2c7ac4246

Check the Books table in the database to see the new book row. You can try get, update and delete functions yourself.

We will use these dynamic proxy functions in the next sections to communicate to the server.

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Localization

Before starting to the UI development, we first want to prepare the localization texts (you normally do when needed while developing your application).

Localization texts are located under the Localization/BookStore folder of the Acme.BookStore.Domain.Shared project:

Open the en.json (the English translations) file and change the content as below:

{
  "Culture": "en",
  "Texts": {
    "Menu:Home": "Home",
    "Welcome": "Welcome",
    "LongWelcomeMessage": "Welcome to the application. This is a startup project based on the ABP framework. For more information, visit abp.io.",
    "Menu:BookStore": "Book Store",
    "Menu:Books": "Books",
    "Actions": "Actions",
    "Close": "Close",
    "Delete": "Delete",
    "Edit": "Edit",
    "PublishDate": "Publish date",
    "NewBook": "New book",
    "Name": "Name",
    "Type": "Type",
    "Price": "Price",
    "CreationTime": "Creation time",
    "AreYouSure": "Are you sure?",
    "AreYouSureToDelete": "Are you sure you want to delete this item?",
    "Enum:BookType:0": "Undefined",
    "Enum:BookType:1": "Adventure",
    "Enum:BookType:2": "Biography",
    "Enum:BookType:3": "Dystopia",
    "Enum:BookType:4": "Fantastic",
    "Enum:BookType:5": "Horror",
    "Enum:BookType:6": "Science",
    "Enum:BookType:7": "Science fiction",
    "Enum:BookType:8": "Poetry"
  }
}

• Localization key names are arbitrary. You can set any name. We prefer some conventions for specific text types;
  • Add Menu: prefix for menu items.
  • Use Enum:<enum-type>:<enum-value> naming convention to localize the enum members. When you do it like that, ABP can automatically localize the enums in some proper cases.

If a text is not defined in the localization file, it fallbacks to the localization key (as ASP.NET Core's standard behavior).

ABP's localization system is built on ASP.NET Core's standard localization system and extends it in many ways. See the localization document for details.

{{if UI == "MVC"}}

Create a Books Page

It's time to create something visible and usable! Instead of classic MVC, we will use the Razor Pages UI approach which is recommended by Microsoft.

Create Books folder under the Pages folder of the Acme.BookStore.Web project. Add a new Razor Page by right clicking the Books folder then selecting Add > Razor Page menu item. Name it as Index:

Open the Index.cshtml and change the whole content as shown below:

@page
@using Acme.BookStore.Web.Pages.Books
@model IndexModel

<h2>Books</h2>

Index.cshtml.cs content should be like that:

using Microsoft.AspNetCore.Mvc.RazorPages;

namespace Acme.BookStore.Web.Pages.Books
{
    public class IndexModel : PageModel
    {
        public void OnGet()
        {
            
        }
    }
}

Add Books Page to the Main Menu

Open the BookStoreMenuContributor class in the Menus folder and add the following code to the end of the ConfigureMainMenuAsync method:

context.Menu.AddItem(
    new ApplicationMenuItem(
        "BooksStore",
        l["Menu:BookStore"],
        icon: "fa fa-book"
    ).AddItem(
        new ApplicationMenuItem(
            "BooksStore.Books",
            l["Menu:Books"],
            url: "/Books"
        )
    )
);

Run the project, login to the application with the username admin and the password 1q2w3E* and see the new menu item has been added to the main menu:

When you click to the Books menu item under the Book Store parent, you are being redirected to the new empty Books Page.

Book List

We will use the Datatables.net jQuery library to show the book list. Datatables library completely work via AJAX, it is fast, popular and provides a good user experience.

Datatables library is configured in the startup template, so you can directly use it in any page without including any style or script file to your page.

Index.cshtml

Change the Pages/Books/Index.cshtml as following:

@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>
        <h2>@L["Books"]</h2>
    </abp-card-header>
    <abp-card-body>
        <abp-table striped-rows="true" id="BooksTable"></abp-table>
    </abp-card-body>
</abp-card>

• abp-script tag helper is used to add external scripts to the page. It has many additional features compared to standard script tag. It handles minification and versioning. See the bundling & minification document for details.
• abp-card is a tag helper for Twitter Bootstrap's card component. There are other useful tag helpers provided by the ABP Framework to easily use most of the bootstrap components. You could use the regular HTML tags instead of these tag helpers, but using tag helpers reduces HTML code and prevents errors by help the of IntelliSense and compile time type checking. Further information, see the tag helpers document.

Index.js

Create an Index.js file under the Pages/Books folder:

The content of the file is shown below:

$(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);
                    }
                }
            ]
        })
    );
});

• abp.localization.getResource gets a function that is used to localize text using the same JSON file defined in the server side. In this way, you can share the localization values with the client side.
• abp.libs.datatables.normalizeConfiguration is a helper function defined by the ABP Framework. There's no requirement to use it, but it simplifies the Datatables configuration by providing conventional default values for missing options.
• abp.libs.datatables.createAjax is another helper function to adapt ABP's dynamic JavaScript API proxies to Datatable's expected parameter format
• acme.bookStore.books.book.getList is the dynamic JavaScript proxy function introduced before.
• luxon library is also a standard library that is pre-configured in the solution, so you can use to perform date/time operations easily.

See Datatables documentation for all configuration options.

Run the Final Application

You can run the application! The final UI of this part is shown below:

This is a fully working, server side paged, sorted and localized table of books.

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{{if UI == "NG"}}

Install NPM packages

Notice: This tutorial is based on the ABP Framework v3.1.0+ If your project version is older, then please upgrade your solution. See the migration guide if you are upgrading an existing project with v2.x.

If you haven't done it before, open a new command line interface (terminal window) and go to your angular folder and then run yarn command to install the NPM packages:

yarn

Create a Books Page

It's time to create something visible and usable! There are some tools that we will use when developing the Angular frontend application:

• Ng Bootstrap will be used as the UI component library.
• Ngx-Datatable will be used as the datatable library.

BookModule

Run the following command line to create a new module, named BookModule in the root folder of the angular application:

yarn ng generate module book --module app --routing --route books

This command should produce the following output:

> yarn ng generate module book --module app --routing --route books

yarn run v1.19.1
$ ng generate module book --module app --routing --route books
CREATE src/app/book/book-routing.module.ts (336 bytes)
CREATE src/app/book/book.module.ts (335 bytes)
CREATE src/app/book/book.component.html (19 bytes)
CREATE src/app/book/book.component.spec.ts (614 bytes)
CREATE src/app/book/book.component.ts (268 bytes)
CREATE src/app/book/book.component.scss (0 bytes)
UPDATE src/app/app-routing.module.ts (1289 bytes)
Done in 3.88s.

BookModule

Open the /src/app/book/book.module.ts and replace the content as shown below:

import { NgModule } from '@angular/core';
import { SharedModule } from '../shared/shared.module';
import { BookRoutingModule } from './book-routing.module';
import { BookComponent } from './book.component';

@NgModule({
  declarations: [BookComponent],
  imports: [
    BookRoutingModule,
    SharedModule
  ]
})
export class BookModule { }

• Added the SharedModule. SharedModule exports some common modules needed to create user interfaces.
• SharedModule already exports the CommonModule, so we've removed the CommonModule.

Routing

Generated code places the new route definition to the src/app/app-routing.module.ts file as shown below:

const routes: Routes = [
  // other route definitions...
  { path: 'books', loadChildren: () => import('./book/book.module').then(m => m.BookModule) },
];

Now, open the src/app/route.provider.ts file replace the configureRoutes function declaration as shown below:

function configureRoutes(routes: RoutesService) {
  return () => {
    routes.add([
      {
        path: '/',
        name: '::Menu:Home',
        iconClass: 'fas fa-home',
        order: 1,
        layout: eLayoutType.application,
      },
      {
        path: '/book-store',
        name: '::Menu:BookStore',
        iconClass: 'fas fa-book',
        order: 2,
        layout: eLayoutType.application,
      },
      {
        path: '/books',
        name: '::Menu:Books',
        parentName: '::Menu:BookStore',
        layout: eLayoutType.application,
      },
    ]);
  };
}

RoutesService is a service provided by the ABP Framework to configure the main menu and the routes.

• path is the URL of the route.
• name is the localized menu item name (see the localization document for details).
• iconClass is the icon of the menu item (you can use Font Awesome icons by default).
• order is the order of the menu item.
• layout is the layout of the BooksModule's routes (there are three types of pre-defined layouts: eLayoutType.application, eLayoutType.account or eLayoutType.empty).

For more information, see the RoutesService document.

Service Proxy Generation

ABP CLI provides generate-proxy command that generates client proxies for your HTTP APIs to make easy to consume your HTTP APIs from the client side. Before running generate-proxy command, your host must be up and running.

Run the following command in the angular folder:

abp generate-proxy

This command will create the following files under the /src/app/proxy/books folder:

BookComponent

Open the /src/app/book/book.component.ts file and replace the content as below:

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

@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>;

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

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

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

• We imported and injected the generated BookService.
• We are using the ListService, a utility service of the ABP Framework which provides easy pagination, sorting and searching.

Open the /src/app/book/book.component.html and replace the content as below:

<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"></div>
    </div>
  </div>
  <div class="card-body">
    <ngx-datatable [rows]="book.items" [count]="book.totalCount" [list]="list" default>
      <ngx-datatable-column [name]="'::Name' | abpLocalization" prop="name"></ngx-datatable-column>
      <ngx-datatable-column [name]="'::Type' | abpLocalization" prop="type">
        <ng-template let-row="row" ngx-datatable-cell-template>
          {%{{{ '::Enum:BookType:' + row.type | abpLocalization }}}%}
        </ng-template>
      </ngx-datatable-column>
      <ngx-datatable-column [name]="'::PublishDate' | abpLocalization" prop="publishDate">
        <ng-template let-row="row" ngx-datatable-cell-template>
          {%{{{ row.publishDate | date }}}%}
        </ng-template>
      </ngx-datatable-column>
      <ngx-datatable-column [name]="'::Price' | abpLocalization" prop="price">
        <ng-template let-row="row" ngx-datatable-cell-template>
          {%{{{ row.price | currency }}}%}
        </ng-template>
      </ngx-datatable-column>
    </ngx-datatable>
  </div>
</div>

Now you can see the final result on your browser:

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The Next Part

See the next part of this tutorial.