Calling the Microsoft Graph API from WinUI

This post is part of the C# Advent Calendar 2021. Be sure to check out all the other great posts there this month!

The Microsoft Graph allows developers to query information from Microsoft 365, including data about users, mail, Teams, OneDrive, notes, and lots more. I’ve been exploring the user and teamwork APIs recently, but in this introduction we will explore how to authenticate and retrieve some user attributes for the authenticated user account.

The sample is a WinUI application created with the Windows App SDK, C#, .NET, and the .NET Graph SDK that will authenticate a Microsoft Account and display the name & email address for the authenticated user.

Start by installing the Visual Studio 2022 workload for .NET Desktop Development and check the option for the Windows App SDK C# Templates to add the project templates to your IDE. Complete instructions for getting started with the latest SDK can be found here.

Next, create a new Blank App, Packaged (WinUI in Desktop) project in Visual Studio. I am using Visual Studio 2022, but 2019 is also supported:


Figure 1 – Creating a new WinUI project

After the project has been created, it’s always a good practice to run it to make sure things are working out of the box. Now we will add the NuGet packages needed to build our WinUI Graph app:

  • Azure.Identity – Used for interactive MSAL authentication
  • Microsoft.Extensions.DependencyInjection – Our DI container of choice for this app
  • Microsoft.Graph – The .NET Graph SDK package
  • Microsoft.Toolkit.Mvvm – A lightweight, open source MVVM framework


Figure 2 – Installing the Microsoft.Toolkit.Mvvm package

Install the latest stable version of each of these packages and build the project again. We’re going to start building the app by creating a GraphService class and an IGraphService interface with one method, GetMyDetailsAsync().

public interface IGraphService
     Task<User> GetMyDetailsAsync();

The method will return a Task of Microsoft.Graph.User. We’ll get to the implementation in a moment, but first we will create an Initialize() method that will be called in the constructor. This is where the authentication code is executed.

private readonly string[] _scopes = new[] { "User.Read" };
private const string TenantId = "<your tenant id here>";
private const string ClientId = "<your client id here>";
private GraphServiceClient _client;

public GraphService()

private void Initialize()
     var options = new InteractiveBrowserCredentialOptions
         TenantId = TenantId,
         ClientId = ClientId,
         AuthorityHost = AzureAuthorityHosts.AzurePublicCloud,
         RedirectUri = new Uri("http://localhost"),

    var interactiveCredential = new InteractiveBrowserCredential(options);

    _client = new GraphServiceClient(interactiveCredential, _scopes);

Using a TenantId in the authentication is only necessary if you want to restrict authentication to a single tenant. To read more about using Azure.Identity and MSAL, check out the docs here. The “User.Read” scope is required to access Graph data for the User object. You can read a complete list of Graph permissions here. The other aspect of using these permissions within your application is that you must have an App Registration in Azure with each required scope granted to the app in the registration. Follow these steps (under Option 2) to add your App Registration to your Azure account in the portal. This is where you will find your ClientId to enter above. Desktop applications will always use “http://localhost” as the RedirectUri.

Now we’re ready to create the implementation to get our User object.

public async Task<User> GetMyDetailsAsync()
         var user = await _client.Me.Request().GetAsync();
         return user;
     catch (Exception ex)
         Console.WriteLine($"Error loading user details: {ex}");
         return null;

The code here is straightforward. Using the GraphServiceClient’s fluent API, we’re requesting “Me” to be returned asynchronously. “Me” will always return a User object for the current authenticated user.

Next, create a MainViewModel class, inheriting from ObservableObject in the MVVM Toolkit. This is the ViewModel for the MainWindow that was created as the main window by the WinUI project template. Use this code for MainViewModel.

public class MainViewModel : ObservableObject
     private string _userName;
     private string _email;

    public MainViewModel()
         LoadUserDetailsCommand = new AsyncRelayCommand(LoadUserDetails);

    public async Task LoadUserDetails()
         var graphService = Ioc.Default.GetService<IGraphService>();
         var user = await graphService.GetMyDetailsAsync();
         UserName = user.DisplayName;
         Email = user.Mail;

    public string UserName
         get { return _userName; }
         set { SetProperty(ref _userName, value, nameof(UserName)); }

    public string Email
         get { return _email; }
         set { SetProperty(ref _email, value, nameof(Email)); }

    public IAsyncRelayCommand LoadUserDetailsCommand { get; set; }

The ViewModel has properties to expose the UserName and Email that will be retrieved from the IGraphService call when LoadUserDetails is called and the service is fetched from the DI container. Now let’s set up the DI container in App.xaml.cs in the constructor after InitializeComponent().

         (new ServiceCollection()
             .AddSingleton<IGraphService, GraphService>()

This is registering GraphService and MainViewModel as singletons in the container. Any call to GetService will fetch the same instance. This works for us because we will only have one MainWindow and we only want to authenticate once during the lifetime of the application.

It’s finally time to work on the UI. Start by opening MainWindow.xaml and use the following markup at the root of the Window, replacing the existing controls.

<Grid x:Name="MainGrid" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="12">
         <RowDefinition Height="Auto"/>
         <RowDefinition Height="Auto"/>
         <RowDefinition Height="Auto"/>
         <RowDefinition Height="Auto"/>
         <RowDefinition Height="*"/>
     <TextBlock Text="User name:" Margin="4" Grid.Row="0"/>
     <TextBox Text="{Binding Path=UserName}" Width="200"
              Margin="4" Grid.Row="1" IsReadOnly="True"/>
     <TextBlock Text="Email:" Margin="4" Grid.Row="2"/>
     <TextBox Text="{Binding Path=Email}" Width="200"
              Margin="4" Grid.Row="3" IsReadOnly="True"/>
     <Button Command="{Binding Path=LoadUserDetailsCommand}"
             Margin="4" Content="Load Data" HorizontalAlignment="Right" Grid.Row="4"/>

We’ve created a parent Grid named MainGrid with five rows, two TextBlock controls and two corresponding TextBoxes, and a Load Data Button. The two TextBox controls have their Text properties bound to the UserName and Email ViewModel properties, and the Button’s Command is bound to the LoadUserDetailsCommand, which calls LoadUserDetails().

Now let’s get the MainViewModel from the DI container in the MainWindow.xaml.cs code behind file and set it as the MainGrid.DataContext. This will complete our data binding for the window.

var viewModel = Ioc.Default.GetService<MainViewModel>();
MainGrid.DataContext = viewModel;

That’s it. You’re ready to run the app. When you click Load Data, you should be prompted to log in to a Microsoft account and accept the scopes required by the app.

winui_graphsdk_04 winui_graphsdk_05

Figure 3 & 4 – Logging in to access the Graph API

Once the login is complete, you should see your username and email address populated in the text fields. We’ve done it! And notice how the WinUI window and controls pick up your Windows theme and other UI appearance without any extra markup or code required. I’m using the dark theme in Windows 11, and my app is as well.


Figure 5 – Displaying the user info in our app

You can do so much more with the Graph API, using the .NET SDK or the REST APIs. Be sure to explore the docs to see what data you might want to leverage in your own apps. You can also test your API calls with the Microsoft Graph Explorer site. To learn more about WinUI, you can also check out my book from Packt Publishing, Learn WinUI 3.

Get the source code for this WinUI app on GitHub to get started with WinUI and the Graph SDK on your own.

Happy coding and happy holidays!

New WPF Quick Tips Series

Hello Morning Dew readers.

I wanted to let my WPF loving readers know that I’ve started a new series of WPF quick tips. This will be a weekly (or more frequent) series of WPF tips based on my experiences developing WPF applications over the last 10 years or so. Most of the tips will be simple, quick hints. Occasionally, I’ll dive a little deeper into topics, as needed.

You can follow these tips over at or just keep an eye on the Xaml section of the Dew Drop posts right here. I’ll be sure to link to each tip.

Thanks for following!

Alvin Tags:

The Dew Review – DevExpress TestCafe

Hot on the heels of my last review for DevExpress Universal 2014.2, I will next dive into my recent experiences with DevExpress TestCafe.


TestCafe is the functional web testing tool from DevExpress. While many web test products work in conjunction with browser plugins, TestCafe works without plugins on any browser that supports HTML5. In today’s world, that translates to ‘any modern browser’.

You can also run on the big three operating systems, Windows, Mac OSX and Linux. I have been working with TestCafe on Windows 8.1, Windows 10 and OSX Yosemite. This operating system and browser agnostic ability affords maximum flexibility for web developers to test applications across multiple versions of browsers. All that is required is another physical or virtual machine running the desired browser(s).

That all sounds great, but you probably hear a lot about cross-browser, cross-platform ability these days. Take a minute and think about what that really means for a functional web testing tool. I can open TestCafe from any browser that can access the machine(s) where TestCafe and my application under test have been installed. So, I can pull out my Ultrabook on the road and record new tests over my company’s VPN. I could also break out my iPod Touch, tablet or Windows Phone and execute test fixtures. That is pretty powerful.

Getting Started

TestCafe claims to be “Functional Web Test, Made Easy”. Let’s see how easy it is to get started using the product. Until last month, I have never used TestCafe. In fact, I never used any kind of web test automation product. I’ve been lucky enough to work for organizations that understand the value to QA and hire dedicated testers who find my bugs that get past my own unit testing and manual testing.

So, how does a newbie like me get started?

DevExpress Demo Pages

A great first place to start is by trying TestCafe through the online demo pages. There are three pages available for selection.

  • TestCafe Example Page
  • ASPxGridView Demo Page
  • ASPxFileManager Demo Page

I decide to try the ASPxGridView Demo Page, so I select it from the list and click the ‘Run Demo’ button. Here is what I see initially.

TestCafe 3 - Demo Step 1 

Figure 1 – Run the online demo

I click the Start Demo link and click through some controls on the grid to auto generate a few test steps.

TestCafe 4 - Demo Step 2

Figure 2 – Online demo test steps

TestCafe includes all of my clicks and keystrokes into the test steps (even my screen capture keystrokes in Step 5 J). Now I can add some assertions to my test fixture or playback the steps that have been generated so far.

After completing this quick demo, I feel ready to jump into the Online Tutorial and create some of my own tests on my development machine.

Online Tutorial

From the main page for TestCafe, there’s a big button that will take you to an online tutorial with videos and step-by-step instructions for getting started with your first tests.

TestCafe 01 - The big button

Figure 3 – The big button.

The online tutorial steps you through creating a project, recording tests, running them, and finally running on remote devices. Here’s a look at the complete outline of the tutorial’s steps.

Test Cafe 02 - Tutorial Steps

Figure 4 – Tutorial Steps

Completing the online tutorial will give you an idea of the base functionality and capabilities of TestCafe. Now it’s time to take that knowledge to the next step.

AngularJS PhoneCat Tutorial App

Now that I have taken some time to familiarize myself with TestCafe using web pages created by DevExpress, I want to try creating a few simple test fixtures with a page that uses one of today’s most popular JavaScript frameworks, AngularJS. I have been working mainly in the world of Windows desktop applications and WPF for the last 18 months, so I turn to Bing to find out how to set up and run a simple AngularJS site.

Not surprisingly, Bing takes me to the AngularJS site where I see that there is a Tutorial under the Develop menu. The tutorial walks you through downloading their sample site, setting it up with Node.js and npm, and running it. The sample site is a simple catalog of Android devices with a list view and detail view.

TestCafe 05 - PhoneCat 1

Figure 5 – AnguluarJS tutorial application – list view

TestCafe 06 - PhoneCat 2

Figure 6 – AngularJS tutorial application – detail view

I create a new Test Project and Test Fixture and record a few tests for the List View page.

TestCafe 07 - Phone List Tests

Figure 7 – Phone List tests

Up to this point everything has been produced for us by TestCafe. Let’s take a moment analyze what has been generated for the tests I created for the Phone List Page. Here’s the JavaScript that is presented when clicking the Edit button on one of the tests or on the Test Fixture itself.

"@fixture Phone List Page";
"@page http://localhost:8000/app/index.html";

"@test"["Sort Phone List"] = {
    "1.Click select": function() {
        var actionTarget = function() {
            return $("").eq(1);
    '2.Click option "Alphabetical"': function() {":containsExcludeChildren(Alphabetical)");
    "3.Click select": function() {"");
    '4.Click option "Newest"': function() {":containsExcludeChildren(Newest)");

"@test"["Search Dell"] = {
    "1.Click input": function() {
        var actionTarget = function() {
            return $("").eq(0);
    "2.Type in input": function() {
        var actionTarget = function() {
            return $("").eq(0);
        act.type(actionTarget, "Dell");

"@test"["Search Samsung"] = {
    "1.Click input": function() {
        var actionTarget = function() {
            return $("").eq(0);
    "2.Type in input": function() {
        var actionTarget = function() {
            return $("").eq(0);
        act.type(actionTarget, "Samsung");

"@test"["Search Motorola sort by name and assert first device name"] = {
    "1.Type in input": function() {
        var actionTarget = function() {
            return $("").eq(0);
        act.type(actionTarget, "Motorola");
    "2.Click select": function() {"");
    '3.Click option "Alphabetical"': function() {":containsExcludeChildren(Alphabetical)");
    "4.Assert": function() {
        eq($(":containsExcludeChildren(DROID 2 Global by Motorola)").text(), "DROID™ 2 Global by Motorola", "First Moto Device");

Notice that the test fixture is designated with @fixture, and each test definition with @test… pretty straightforward. Each test step is a function that returns the UI element to act upon followed by the action to perform on that element. My final test includes an assert as a final step. This checks that the first list element’s text is equal to what is expected after searching for Motorola and sorting the results alphabetically.

I can access the test fixture on my Windows Phone’s browser.


Figure 8 – TestCafe on Windows Phone 8.1

And I can kick off a test run.


Figure 9 – Tests executing on Windows Phone 8.1

So, that is a quick look at some of the basics of getting TestCafe up and running. There is a lot you can accomplish without knowing much more than what the Online Tutorial provides. To learn some more advanced features of the test fixtures in TestCafe, refer to the Test Fixture API Reference guide in the online documentation.

Feature Focus – Continuous Integration

I am a big fan of automated builds and continuous integration (CI) in development. I think it is one of the essentials of creating quality software. CI can do things for your team like running unit tests, code analysis and enabling continuous deployments to dev and test environments. Even at a bare minimum, CI can provide immediate feedback if a change one developer makes in a software component breaks something else in the system.

Automating and integrating functional web tests with CI builds is an extremely valuable proposition. It means that the number of regression bugs discovered by QA will be greatly reduced as builds that fail test steps in TestCafe will never be deployed to QA environments.

TestCafe has an entire section of their online documentation dedicated to continuous integration as well as a CI API reference.

At a glance, these are the steps that will need to be completed to set up CI for most types of servers (taken from the online docs).

  • Copy your tests to the server.
  • Setup TestCafe on the server.
  • Write a Node.js application that runs the tests and logs the results.
  • Call the application from your Continuous Integration system.

The sample node.js app in the online docs logs results to the console. Depending on your CI system, you will either use this method and pick up the results through the console output, or you may want to log the output to a file. There is an example of file output on another online documentation example. Here’s a snippet of that example:

var fs = require('fs');
testCafe.runTests(runOptions, function () {
      testCafe.on('taskComplete', function (report) {
           log('\n' + new Date().toString() + ':\n' + JSON.stringify(report));
function log(mssg) {
       fs.appendFile(LOG_FILE_NAME, mssg, function (err) {
             if (err) 
                throw err;

My current build server of choice at home and at work is JetBrains TeamCity. I have also used CruiseControl .NET in the past. While the basic steps were a good starting point, I wanted to find more detailed instructions specific to my TeamCity implementation.

Getting Support

I want to find out more information about TestCafe continuous integration with TeamCity. Where do I turn? To me, the logical first step is to try the Support page on the TestCafe site.

I kept it simple and searched for “TeamCity” and got just a single search result. Luckily, this one result was exactly what I needed. There is no direct support between TestCafe and TeamCity, but they can be integrated using the node.js app approach detailed in the online CI documentation. The method for doing this is similar for Jenkins CI servers, and Marion the DevExpress support representative who answered the question provided a link to the Jenkins information.

The TeamCity equivalent of these Jenkins steps include:

· Create a node.js app and place it on the build server. (The app in the Jenkins example will serve.)

· Install node.js on the build server.

· Add a Windows Command Line step to the desired build configuration in TeamCity that executes the node.js app.

· Capture the result.xml as the build report output.

If you want immediate feedback on your continuous builds, you will probably want to limit the number of tests run. I recommend creating either an hourly or daily build that executes all of your unit tests, integration tests and TestCafe functional tests.

Wrapping Up

Automating your functional tests can provide a great deal of value to any product. It takes a huge load off of the QA department once a full test suite has been created for your web applications. The licensing cost of TestCafe makes it something that every development shop should consider, regardless of the company or team size.

Go give it a try. There’s a 30-day free trial plus a 60-day money back guarantee if you’re not satisfied with the product.


Happy coding!



Disclosure of Material Connection: I received one or more of the products or services mentioned above for free in the hope that I would mention it on my blog. Regardless, I only recommend products or services I use personally and believe my readers will enjoy. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials in Advertising.