Getting Started with ASP NET Core 1 and Angular 2 in Visual Studio 2015

The goal of this post is to set up a Visual Studio 2015 project with ASP NET Core 1 and Angular 2 Typescript that can be used as a template for all my projects.

ASP NET Core1 Logo         angular2Logo

The whole code is available on GitHub: https://github.com/softwarejc/angular2-aspmvc-core1-getting-started

We will use npm (Node Package Manager) to add our dependencies and we will configure the typescript transpiler integrated in Visual Studio. We will also configure a gulp task to bundle our javascript an css dependencies.

Content

  • Introduction
  • Install Pre-requisites
  • Create an empty ASP Core 1 project
  • Auto transpile Typescript after save
  • Add Angular 2 with npm
  • Set up gulp task to bundle dependencies

Introduction

The former ASP.NET 5 was renamed to .NET Core 1. It is a modular Microsoft runtime library implementation that includes a subset of the .NET Framework.

.NET Core 1 was written from scratch. It has a lot of advantages, for example it is lighter, open-source and multi-platform: Mac, Linux and Windows.

Although the version 1 is in Release Candidate there are some ASP.NET 4.6 features missing, like SignalR.

It is up to you to choose a mature Framework like ASP.NET 4.6 or a modern one like ASP.NET Core 1… you can read more about it in this post by Scott Hanselman. I copied the following diagram from that post :-).

ASPNET Core 1

Install Pre-requisites

There are some problems in Windows using npm version 2. It nest dependencies and ends up having too long paths for Windows. Let’s start updating npm to version 3 and configuring Visual Studio to use it.

The first thing that we should do is to install Python version 2.7.X and NodeJS version 4.2.X. Remember the path where you install NodeJS, we will need it later.

Now open a command line and update npm:

npm install npm -g

Check your npm version:

npm -v

The version should be higher than 3.X.X.

Open visual studio and add the path where NodeJS is installed as the first path to look for external tools (at the top). The next time that Visual Studio has to restore a node package it will start looking for nodejs.exe in that path. The version we just installed will be found and used.

Configure VS to use npm 3

Create an empty ASP NET Core 1 project

Let’s create our project and configure a very simple server-side code.

In Visual Studio 2015 Update 1 ASP NET Core 1 is still called ASP NET 5. Create a new project and select the WebAPI template. Our project will have a SPA that will call a WebAPI controller to get a message.

Create ASPNET 5 Project

 

Delete the Project_Readme.html and update the values controller with this simple WebAPI controller that returns a hello message and the server UTC Time:

We will call this method later from angular to check that the communication between our SPA and the server works. For now we can call it from the browser to check it. Run the application and write something like this in your browser using your configured port:

http://localhost:10137/api/hello

You should see something like:

apiTest

You can also pass your name to check that the server receive your parameters:

http://localhost:10137/api/hello?name=JuanCarlos

The file Startup.cs contains the configuration of the middleware. We will see in a future post how it works and how to configure it to use features like authentication. The default configuration when you select a WebAPI project template is ok for us.

Auto transpile Typescript after save

We can tell Visual Studio to auto transpile always that we edit and save a typescript file enabling:

“Automatically compile TypeScript files which are not part of a project”
ts Compile on Save

Our files will be part of the project… but this is an easy way to make Visual Studio auto transpile. Running typescript compiler in watch mode is an alternative… but I like this solution because I have everything integrated in Visual Studio.

If you know a better way please leave me a comment. 🙂

We will have a tsconfig.json file on the project root of our project to configure typescript, Visual Studio will use that file and not the settings that we configure in Options:

Add Angular 2 with npm

The application that we will use as an example will be a simple application that call the server to get a message and will display using Angular 2.

Let’s add Angular 2 and other dependencies to npm, we need a file called “package.json” on the root of our project:

Save the file and Visual Studio will create node_modules folder and download all dependencies for you.

It is out of the scope of this post to explain how Angular 2 works you can read more about it here. But basically we define a component that we can use in our index.

<hello></hello>

This component is a html view that has bindings to its code behind or “view-model”.

hello.view.html

hello.component.ts

The hello.component uses the service hello.service that makes REST calls to the server and returns Observable<T>.

hello.service.ts

We need to “start” / “bootstrap” our application. We will use System.JS to do that. This is this index.html where we “start” our Angular 2 app:

index.html

This is the piece of code of index.html that bootstrap our application:

System.import(‘./app/bootstrap’).then(null, console.error.bind(console));

And this is our bootstrap.ts:

Set up gulp task to bundle dependencies

Our index.html only references a style.css and a deps.js file. Those files are a bundle with all our dependencies. To create that bundle we will use gulp. We need this gulpfile.js on the root of our project:

We want to create our bundles automatically when we rebuild or clean the project (not in every build).

Open Task Runner Explorer and bind the clean and bundle tasks to the “Clean” Visual Studio event:

GulpBinding

This will trigger our tasks always that we clean or rebuild our solution. You can also add the bundle task to the “Before Build” event… but it can takes 8-10 seconds and normally the dependencies are not changing in every build.

We have a pre-configured project that hopefully will save us some time in the future!

If you know how to make it better please leave me a comment!

Have fun with ASP.NET Core and Angular 2!

SPA AngularJS Authentication using Microsoft Azure Active Directory (ADAL)

The goal of this post is to add authentication to a single page application using a free subscription of Microsoft Azure Active Directory , for that we will use the Active Directory Authentication Library (ADAL) for JavaScript.

Microsoft also offers other versions of this library for Windows Phone, Android and iOS applications – all of them also open source.

You can find all the code of the sample application that we will write on my git hub. You can also see a running demo here.

To use the demo you can login with a guest account:

user: guest@softwarejc.onmicrosoft.com
pass: Softwarejc123

Agenda

  • Some details about our sample application
  • Azure: Create a Microsoft Azure Active Directory and add an Application to it
  • How to use ADAL to add Authorization to a AngularJS state
  • How to use ADAL to add Authorization to a WebAPI controller
  • Conslusion

Some details about our sample application

We will add authentication to a very simple application – a list of tasks to do. This application uses SignalR to notify all connected clients when a note was added/removed.

ToDO list - Application architecture

ToDO list – Application architecture

The user will be asked for his user and password when he tries to open a restricted section of the application and all request to the “Authorized” WebAPI controller will return a “401 Unauthorized” error if the user was not identified.

Azure: Create a Microsoft Azure Active Directory and Add an Application to it

We need a Microsoft Azure Active Directory, by default you should have one on your azure account. If you want to create a new one just open Azure > Active Directory and add it. Continue reading

AngularJS and SignalR

The goal of this post is to connect and use SignalR from AngularJS. All the code is available in GitHub.

All code is available here: GitHub Link

The application used in this post allows to add tasks to a collaborative list of tasks to do. The application displays a list with all the tasks pending to do and also allows to remove them from the list. SignalR will push the notification “newTask” and “taskDone” to all connected users.

Feel free to get the code from github and run the application in more than one place (different tabs in your explorer) to see how SignalR synchronizes all of them.

The simplicity of the application allows to focus on the goal of this post: SignalR and AngularJS.

This is a screenshot of the running application.

Screenshot of the signalR and angularJS app.

SignalR Hub

The first thing that we need is to configure the OWIN startup, we need this class in our project:

[assembly: OwinStartup(typeof(Startup))]
namespace AngularJS_SignalR
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            // SignalR
            app.MapSignalR();
        }
    }
}

The signalR hub type is “INotesCallbacks”, this interface defines the callbacks that the hub can make to the connected clients.

    // Client callbacks
    public interface INotesCallbacks
    {
        // Notify note added
        Task BroadcastNewNote(Note newNote);
        // Notify note removed
        Task BroadcastRemoveNote(int noteId);
    }

The hub also implement the interface “INotesCalls” this interfaces defines the hub methods that clients can call.

    // Client calls
    public interface INotesCalls
    {
        // Add note
        Task AddNote(string note);
        // Get all notes
        IEnumerable<Note> GetAllNotes();
        // Remove note
        Task RemoveNote(int roomId);
    }

This is the implementation of the hub:
Continue reading

AngularJS – CRUD Data Grid III

The goal of this post is to extend the AngularJS CRUD Grid that we created in previous posts:

We will add now the following requirements:

  • # 1 Filter items.
  • # 2 Custom buttons: This will allow us to add button columns that will call the parent controller with the id of the button clicked and the associated item as parameter.

Results

Code is available on github: https://github.com/softwarejc/angularjs-crudgrid. Feel free to play with it, find errors and write improvements.

You can see a live demo here: AngularJS CRUD Grid III demo.

Filters:

All items

image

Items containing the letter ‘c’

image

Custom buttons:

image

Button click, callback that shows a popup:

image

Implementation

Continue reading

AngularJS – CRUD Data Grid II

The goal of this post is to extend the AngularJS CRUD Grid that we created in a previous post:  AngularJS – CRUD Grid I UPDATE:

Results

Code is available on github: https://github.com/softwarejc/angularjs-crudgrid. Feel free to play with it, find errors and write improvements. You can see a live demo here: AngularJS CRUD Grid III demo.

In that post we wrote a single page application (SPA) to display a list of items inside a grid. The grid allows all the CRUD operations: CreateRead, Update and Delete items. We will add now the following requirements:

  • # 1 Confirmation dialog before deleting an item.
  • # 2 Column ordering.
  • # 3 CRUD Grid as a directive
    • # 3.1 Dynamic columns generation.
    • # 3.2 Column options: Type, visibility, header, mandatory.
  • # 4 Cell editor directive, text and date mode. Use AngularJS date picker in date format columns

Results

You can see a demo here: AngularJS CRUD Grid II demo. I will share the interesting code of the application in this post and one of my next steps will be to upload all the code to GitHub.

Running application

Angular JS CRUD Grid. Dynamic columns

Delete confirmation

Angular JS CRUD Grid. Delete confirmation

Date picker

Angular JS CRUD Grid. Date picker.

Implementation

Continue reading