Outlook Contacts API - 分页结果

Question

I'm trying to display ALL the Outlook contacts for a selected account. When an account has a few thousand contacts, the following code only shows the first n contacts. The contactResults object has a MorePagesAvailable property and a GetNextPageAsync() method available, but I clearly do NOT know how to use them. Can someone please enlighten me.

string token = (string)Session["access_token"];
string email = (string)Session["user_email"];

// Since we have the token locally from the Session, just return it here
OutlookServicesClient client = new OutlookServicesClient(new Uri("https://outlook.office.com/api/v2.0"), async () => { return token; });

client.Context.SendingRequest2 += new EventHandler<SendingRequest2EventArgs>((sender, e) => InsertXAnchorMailboxHeader(sender, e, email));

var contactResults = await client.Me.Contacts
                    .OrderBy(c => c.DisplayName)
                    .Take(2500)
                    .Select(c => new DisplayContact(c))
                    .ExecuteAsync();

foreach (DisplayContact displayContact in contactResults.CurrentPage)
    System.Diagnostics.Debug.WriteLine(displayContact);

Answer 1

var contactResults = await client.Me.Contacts
                .OrderBy(c => c.DisplayName)
                .Select(c => new DisplayContact(c))
                .ExecuteAsync();

while (true)
{
    foreach (DisplayContact displayContact in contactResults.CurrentPage)
        System.Diagnostics.Debug.WriteLine(displayContact);

    if (contactResults.MorePagesAvailable)
        contactResults = await contactResults.GetNextPageAsync();
    else
        break;
}