[Micorosoft Graph] DirectoryObject から DisplayName を取得したい

自分が所有者になっているグループの一覧を取得したい。

Program.cs

using Azure.Identity;
using Microsoft.Graph;

var scopes = new[] { "Directory.Read.All" };

var tenantId = "common";

var clientId = "{ Client_Id }";

var options = new InteractiveBrowserCredentialOptions
{
    TenantId = tenantId,
    ClientId = clientId,
    AuthorityHost = AzureAuthorityHosts.AzurePublicCloud,
    RedirectUri = new Uri("http://localhost:5001/"),
};

var interactiveCredential = new InteractiveBrowserCredential(options);

var graphClient = new GraphServiceClient(interactiveCredential, scopes);
var ownedObjectsPage = await graphClient.Me.OwnedObjects
    .Request()
    .Select("id,displayName")
    .GetAsync();
var ownedObejcts = ownedObjectsPage.Where(g => g.ODataType == "#microsoft.graph.group");

foreach (var obej in ownedObejcts)
{
    Console.WriteLine(obej.DisplayName); // ここでエラー
}

しかしこれだと obej に DisplayName がないと言われてしまう。

しかし Graph Explorer では DisplayName もちゃんと取れるし JSON にシリアライズしてみるとちゃんと DisplayName も持っている。

Program.cs

using System.Text.Json;
using Azure.Identity;
using Microsoft.Graph;

var scopes = new[] { "Directory.Read.All" };

var tenantId = "common";

var clientId = "{ Client_Id }";

var options = new InteractiveBrowserCredentialOptions
{
    TenantId = tenantId,
    ClientId = clientId,
    AuthorityHost = AzureAuthorityHosts.AzurePublicCloud,
    RedirectUri = new Uri("http://localhost:5001/"),
};

var interactiveCredential = new InteractiveBrowserCredential(options);

var graphClient = new GraphServiceClient(interactiveCredential, scopes);
var ownedObjectsPage = await graphClient.Me.OwnedObjects
    .Request()
    .Select("id,displayName")
    .GetAsync();
var ownedObejcts = ownedObjectsPage.Where(g => g.ODataType == "#microsoft.graph.group");

foreach (var obej in ownedObejcts)
{
    var jsonString = JsonSerializer.Serialize(obej);
    Console.WriteLine(jsonString);
}

結論、DirectoryObject にはプロパティがないのでキャストしてあげれば OK。

Program.cs

using Azure.Identity;
using Microsoft.Graph;

var scopes = new[] { "Directory.Read.All" };

var tenantId = "common";

var clientId = "16b9bba3-76fd-4077-aac1-f03b343321a6";

var options = new InteractiveBrowserCredentialOptions
{
    TenantId = tenantId,
    ClientId = clientId,
    AuthorityHost = AzureAuthorityHosts.AzurePublicCloud,
    RedirectUri = new Uri("http://localhost:5001/"),
};

var interactiveCredential = new InteractiveBrowserCredential(options);

var graphClient = new GraphServiceClient(interactiveCredential, scopes);
var ownedObjectsPage = await graphClient.Me.OwnedObjects
    .Request()
    .Select("id,displayName")
    .GetAsync();
var ownedObejcts = ownedObjectsPage.Where(g => g.ODataType == "#microsoft.graph.group");

foreach (var obej in ownedObejcts)
{
    Console.WriteLine(((Group)obej).DisplayName);
}