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Get signed in user's emails

In this exercise you will incorporate the Microsoft Graph into the application. For this application, you will use the Microsoft Graph .NET Client Library to make calls to Microsoft Graph.

Get user details

  1. Open ./Graph/GraphHelper.cs and add the following function to the GraphHelper class.

    public static async Task<User?> GetMeAsync()
{
    try
    {
        // GET /me
        return await graphClient!.Me
            .Request()
            .Select(u => new{
                u.DisplayName,
                u.Mail
            })
            .GetAsync();
    }
    catch (ServiceException ex)
    {
        Console.WriteLine($"Error getting signed-in user: {ex.Message}");
        return null;
    }
}

  2. Add the following code in Program.cs just after the // Get signed in user call to get the user and output the user's display name.

    var user = await GraphHelper.GetMeAsync();
Console.WriteLine($"Signed in user: {user!.DisplayName}\n");

If you run the app now and select option 2, the app will output:

.NET Core Graph Tutorial

Please choose one of the following options:
0. Exit
1. Display access token
2. View the signed in user
3. View the signed in user emails
4. Send an email as the signed in user
2
To sign in, use a web browser to open the page https://microsoft.com/devicelogin and enter the code AVHEDWCK9 to authenticate.
Signed in user: Megan Bowen

Get user's emails

  1. Add the following function to the GraphHelper class to get emails from the user's inbox.

    public static async Task<IMailFolderMessagesCollectionPage?> GetMessagesAsync(int numberOfMessages = 5)
{
    try
    {
        // GET /me
        return await graphClient!.Me.MailFolders.Inbox.Messages
            .Request()
            .Select(u => new{
                u.Subject,
                u.From
            })
            .Top(numberOfMessages)
            .OrderBy("receivedDateTime desc")
            .GetAsync();
    }
    catch (ServiceException ex)
    {
        Console.WriteLine($"Error getting signed-in user messages: {ex.Message}");
        return null;
    }
}

Consider what this code is doing.

  • The URL that will be called is /me/messages.
  • The Top function requests at most 5 messages.
  • The Select function limits the fields returned for each message to just those the app will actually use.
  • The OrderBy function sorts the results by the received date time.

Display the results

  1. Add the following just after the // Get messages comment in the Program.cs file.

    var messages = await GraphHelper.GetMessagesAsync();

Console.WriteLine($"Signed in user emails:\n");
foreach(var message in messages!) {
    Console.WriteLine($"{message.From.EmailAddress.Name} ({message.From.EmailAddress.Address}): {message.Subject}");
}

  2. Save all of your changes and run the app. Choose the View the signed in user emails option to see a list of the user's emails.

    Please choose one of the following options:
1. Exit
2. Display access token
3. View the signed in user
4. View the signed in user emails
5. Send an email as the signed in user
3
To sign in, use a web browser to open the page https://microsoft.com/devicelogin and enter the code ATZSZ5W8L to authenticate.
Signed in user emails:

Microsoft (microsoft-noreply@microsoft.com): Get started with your new Microsoft 365 E5 Compliance trial
Microsoft Audio Conferencing (maccount@microsoft.com): You now have Audio Conferencing for Microsoft Teams or Skype for Business Online – Here is your dial-in information and PIN
Yammer (notifications@yammer.com): You have been added on Contoso Demo to Leadership
Sales and Marketing (SalesAndMarketing@M365x55726300.onmicrosoft.com): You've joined the Sales and Marketing group
Mark 8 Project Team (Mark8ProjectTeam@M365x55726300.onmicrosoft.com): You've joined the Mark 8 Project Team group
Please choose one of the following options:
1. Exit
2. Display access token
3. View the signed in user
4. View the signed in user emails
5. Send an email as the signed in user

Next step