Get All Contacts using Lync ContactManager

Right now I'm using the the LyncClient.ContactManager.BeginSearch method to find contacts. However, I haven't been able to figure out ho开发者_运维问答w to get all the contacts. I've tried passing "*" and "%" as wild-card characters but that has not worked. Right now here is my function call.

_lyncClient.ContactManager.BeginSearch("*", SearchProviders.GlobalAddressList, SearchFields.DisplayName, SearchOptions.ContactsOnly, 400, SearchCallback, "Searching Contacts");

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Lync contacts are organised into groups, so you need to start at the Groups level. Once you've got a group, you can then enumerate through it's Contacts

foreach(var group in _client.ContactManager.Groups)
{
    foreach (var contact in group)
    {
        MessageBox.Show(contact.Uri);
    }
}

This article is good for background, and more advanced features

Edit: Specifically, for the distribution groups expansion question, I think the sample here is flawed.

Instead of calling BeginExpand and waiting on the WaitHandle, provide a callback method to handle the Expand callback. So, instead of:

asyncOpResult = DGGroup.BeginExpand(null, null);
asyncOpResult.AsyncWaitHandle.WaitOne();

DGGroup.EndExpand(asyncOpResult);

try this:

...
asyncOpResult = DGGroup.BeginExpand(ExpandCallback, DGGroup);
...

public void ExpandCallback(IAsyncResult ar)
{
    DistributionGroup DGGroup = (DistributionGroup)ar.AsyncState;
    DGGroup.EndExpand(ar);

    etc...
}

This works perfectly for me.

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I ended up doing multiple searches for now to get all the contacts. I go through each letter of the alphabet to find them. The load time is quick enough and I'll just show a loading image on the grid for a little while when it fires up. This worked well for the 200 or so contacts we have though I would recommend Paul's solution for 150 or less. Here is what I did:

private static char[] Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
...

public void GetAllContacts()
{
   int initialLetterIndex = 0;

  _lyncClient.ContactManager.BeginSearch(
    Alphabet[initialLetterIndex].ToString();
    SearchProviders.GlobalAddressList,
    SearchFields.FirstName,
    SearchOptions.ContactsOnly,
    300,
    SearchAllCallback
    new object[] { initialLetterIndex, new List<Contact>() }
  );
}

private void SearchAllCallback(IAsyncResult result)
{
  object[] parameters = (object[])result.AsyncState;
  int letterIndex = (int)parameters[0] + 1;
  List<Contact> contacts = (List<Contact>)parameters[1];

  SearchResults results = _lyncClient.ContactManager.EndSearch(result);
  contacts.AddRange(results.Contacts);

  if (letterIndex < Alphabet.Length)
  {
    _lyncClient.ContactManager.BeginSearch(
      Alphabet[letterIndex].ToString(), 
      SearchAllCallback, 
      new object[] { letterIndex, contacts }
    );
  }
  else
  {
    //Now that we have all the contacts 
    //trigger an event with 'contacts' as the event arguments.
  }
}