Executing POST request for Microsoft Graph API to add members to an AD group

Question

I am trying to add members to an AD groups invoking Microsoft Graph API through an Azure Function

It is very easy and straightforward to execute GET requests through Graph API's, but I can't find any examples how I could execute post requests for the Graph API

I do have an example of a post request for the Graph API which is

POST https://graph.microsoft.com/v1.0/groups/{id}/members/$ref
Content-type: application/json
Content-length: 30

{
  "@odata.id": "https://graph.microsoft.com/v1.0/directoryObjects/{id}"
}

Here is the code I successfully use to retrieve the Graph response

public static async Task<HttpResponseMessage> GetDirectoryUsers(string graphToken, TraceWriter log, string displayName)
{
    HttpClient client = new HttpClient();
    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", graphToken);

    string requestUrl = "https://graph.microsoft.com/v1.0/groups?$top=2&$filter=displayName eq '" + displayName + "'&$expand=Members";
    var request = new HttpRequestMessage(new HttpMethod("GET"), requestUrl);
    var response = await client.SendAsync(request);
    return response;
}

However, I am completely lost how I could execute the request through a C# code within the Azure function to ADD the retrieved users to another AD. How can construct the request URL? How should I handle the odata id within that request URL?

If anyone could help me in any way, I would greatly appreciate it

Answer 1

Here is the answer that worked for me

public static async Task<string> AddGroupMember(string accessToken, string groupId, string memberId)
{
    var status = string.Empty;
    try
    {
        string endpoint = "https://graph.microsoft.com/v1.0/groups/" + groupId + "/members/$ref";
        string queryParameter = "";

        // pass body data 
        var keyOdataId = "@odata.id";
        var valueODataId = "https://graph.microsoft.com/v1.0/directoryObjects/" + memberId;

        var values = new List<KeyValuePair<string, string>>
{
    new KeyValuePair<string, string>(keyOdataId, valueODataId)
};
        var jsonData = $@"{{ ""{keyOdataId}"": ""{valueODataId}"" }}";
        var body = new StringContent(jsonData, Encoding.UTF8, "application/json");


        using (var client = new HttpClient())
        {
            using (var request = new HttpRequestMessage(HttpMethod.Post, endpoint + queryParameter))
            {
                request.Content = body;
                request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);

                using (var response = await client.SendAsync(request))
                {
                    if (response.StatusCode == HttpStatusCode.NoContent)
                        status = "Member added to Group";
                    else
                        status = $"Unable to add Member to Group: {response.StatusCode}";
                }
            }
        }
    }
    catch (Exception ex)
    {
        status = $"Error adding Member to Group: {ex.Message}";
    }

    return status;
}