如何使用EWS从需要的与会者中获取小组详细信息

Question

由于该组中有更多地址，我试图从与会者那里获取电子邮件地址的详细信息，这是我的代码。

public List<Meeting> getAll(string email, string sDate, string eDate)
    {
        List<Meeting> res = new List<Meeting>(); 
        ExchangeService es = new ExchangeService();
        string username = Properties.Settings.Default.username;
        string password = Properties.Settings.Default.password;
        SecureString ssPassword = new SecureString();
        foreach (char x in password)
            ssPassword.AppendChar(x);

        es.Credentials = new NetworkCredential(username, ssPassword);
        es.Url = new Uri("https://outlook.office365.com/ews/exchange.asmx");
        FolderId folderID = new FolderId(WellKnownFolderName.Calendar, "[email protected]");

        DateTime startDate = DateTime.ParseExact(sDate + " 00:00:00", "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);
        DateTime endDate = DateTime.ParseExact(eDate + " 23:59:59", "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);

        CalendarView cView = new CalendarView(startDate, endDate);
        //cView.PropertySet = new PropertySet(BasePropertySet.FirstClassProperties);

        FindItemsResults<Item> resultItem = es.FindItems(folderID, cView);

        foreach (Item item in resultItem.Items)
        {
            ServiceResponseCollection<GetItemResponse> itemResponseCollection = es.BindToItems(new[] { new ItemId(item.Id.UniqueId) }, new PropertySet(BasePropertySet.FirstClassProperties));
            foreach (GetItemResponse itemResponse in itemResponseCollection)
            {
                Appointment app = (Appointment)itemResponse.Item;
                res.Add(GetClassFromAppointment(app));
            }
        }
        return res;
    }

obj.Attendees = {[email protected], [email protected], [email protected]}“ [email protected]”包括更多电子邮件地址：ccc @ xxxx.com，ddd @ xxxx.com

如何从组中获取详细地址？

Answer 1

您应该只使用EWS ExpandGroup操作https://docs.microsoft.com/en-us/exchange/client-developer/exchange-web-services/how-to-expand-distribution-groups-by-using-ews-in-exchange-2013。例如，使用您的代码，例如

// Return the expanded group.
 ExpandGroupResults myGroupMembers = es.ExpandGroup("[email protected]");
 // Display the group members.
 foreach (EmailAddress address in myGroupMembers.Members)
 {
    Console.WriteLine("Email Address: {0}", address);
 }

另一种方法是因为您使用的是Office365，因此可以使用Microsoft Graph API https://docs.microsoft.com/en-us/graph/api/group-list-members?view=graph-rest-1.0&tabs=http来获取组成员。>