abp/docs/Tutorials/AspNetCore-Mvc/Part-II.md

ASP.NET Core MVC Tutorial - Part II

About the Tutorial

In this tutorial series, you will build an application that is used to manage a list of books & their authors. Entity Framework Core (EF Core) will be used as the ORM provider (as it comes pre-configured with the startup template).

This is the second part of the tutorial series. See all parts:

• Part I: Create the project and a book list page
• Part II: Create, Update and Delete books (this tutorial)
• Part III: Integration Tests

You can download the source code of the application from here.

Creating a New Book

In this section, you will learn how to create a new modal dialog form to create a new book. The result dialog will be like that:

Create the Modal Form

Create a new razor page, named CreateModal.cshtml under the Pages/Books folder of the Acme.BookStore.Web project:

CreateModal.cshtml.cs

Open the CreateModal.cshtml.cs file (CreateModalModel class) and replace with the following code:

using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Volo.Abp.AspNetCore.Mvc.UI.RazorPages;

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

        private readonly IBookAppService _bookAppService;

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

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

• [BindProperty] attribute on the Book property binds post request data to this property.
• This class simply injects the IBookAppService in its constructor and calls the CreateAsync method in the OnPostAsync handler.

CreateModal.cshtml

Open the CreateModal.cshtml file and paste the code below:

@page
@inherits Acme.BookStore.Pages.BookStorePageBase
@using Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
@model Acme.BookStore.Pages.Books.CreateModalModel
@{
    Layout = null;
}
<abp-dynamic-form abp-model="Book" data-ajaxForm="true" 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>

• This modal uses abp-dynamic-form tag helper to automatically create the form from the CreateBookViewModel class.
  • abp-model attribute indicates the model object, the Book in this case.
  • data-ajaxForm attribute makes the form to submit via AJAX, instead of classic page post.
  • abp-form-content tag helper is a placeholder to render the form. This is optional and needed only if you added some other content in the abp-dynamic-form tag.

Add the "New book" Button

Open the Pages/Books/Index.cshtml and change the abp-card-header tag as shown below:

<abp-card-header>
    <abp-row>
        <abp-column size-md="_6">
            <h2>@L["Books"]</h2>
        </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>

Just added a New book button to the top right of the table:

Open the wwwroot/pages/books/index.js and add the following code just after the datatable configuration:

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 is a helper class to open and manage modals in the client side. It internally uses Twitter Bootstrap's standard modal, but abstracts many details by providing a simple API.

Now, you can run the application and add new books using the new modal form.

Updating An Existing Book

TODO...