Get incremental changes for a group in Microsoft Graph in C# - asp.net-core

Question

I have the following code to get users from an AAD group:
public async Task<IGroupTransitiveMembersCollectionWithReferencesPage> GetGroupMembersPageByIdAsync(string groupId)
{
return await graphServiceClient
.Groups[groupId]
.TransitiveMembers
.Request()
.Top(999)
.GetAsync();
}
public async Task<IGroupTransitiveMembersCollectionWithReferencesPage> GetGroupMembersNextPageAsnyc(
IGroupTransitiveMembersCollectionWithReferencesPage groupMembersRef,
string nextPageUrl)
{
groupMembersRef.InitializeNextPageRequest(_graphServiceClient, nextPageUrl);
return await groupMembersRef
.NextPageRequest
.GetAsync();
}
public async Task<(List<AzureADUser> users,
string nextPageUrl,
IGroupTransitiveMembersCollectionWithReferencesPage usersFromGroup)> GetFirstUsersPageAsync(Guid objectId)
{
var users = new List<AzureADUser>();
var usersFromGroup = await GetGroupMembersPageByIdAsync(objectId.ToString());
usersFromGroup.AdditionalData.TryGetValue("#odata.nextLink", out object nextLink1);
var nextPageUrl = (nextLink1 == null) ? string.Empty : nextLink1.ToString();
users.AddRange((IEnumerable<AzureADUser>)(usersFromGroup));
return (users, nextPageUrl, usersFromGroup);
}
public async Task<(List<AzureADUser> users,
string nextPageUrl,
IGroupTransitiveMembersCollectionWithReferencesPage usersFromGroup)> GetNextUsersPageAsync(string nextPageUrl, IGroupTransitiveMembersCollectionWithReferencesPage usersFromGroup)
{
var users = new List<AzureADUser>();
usersFromGroup = await GetGroupMembersNextPageAsnyc(usersFromGroup, nextPageUrl);
usersFromGroup.AdditionalData.TryGetValue("#odata.nextLink", out object nextLink2);
nextPageUrl = (nextLink2 == null) ? string.Empty : nextLink2.ToString();
users.AddRange((IEnumerable<AzureADUser>)(usersFromGroup));
return (users, nextPageUrl, usersFromGroup);
}
I'm trying to learn about how I can use delta query functionality: https://learn.microsoft.com/en-us/graph/delta-query-groups so that next time when I run this, I can get the difference (new users/removed users/updated users) and return that list. Is that possible via delta query functionality?

Answer 1

I had a test in my asp.net core mvc project and you can get delta information by code below.
using Azure.Identity;
using Microsoft.Graph;
public async Task<IActionResult> Index()
{
var scopes = new[] { "https://graph.microsoft.com/.default" };
var tenantId = "your_tenant_name.onmicrosoft.com";
var clientId = "azure_ad_app_id";
var clientSecret = "client_secret";
var clientSecretCredential = new ClientSecretCredential(
tenantId, clientId, clientSecret);
var graphClient = new GraphServiceClient(clientSecretCredential, scopes);
//get group members
var users = await graphClient.Groups["groupId"].TransitiveMembers.Request().Top(999).GetAsync();
//get group member delta info
var delta = await graphClient.Groups.Delta().Request().Filter("id eq 'group_id'").GetAsync();
return View();
}