ContactManager.GetContacts Method

Reference

Definition

Namespace:: System.Net.PeerToPeer.Collaboration

Assembly:: System.Net.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Returns a PeerContactCollection that contains all contacts within the ContactManager of the remote peer.

public:
 System::Net::PeerToPeer::Collaboration::PeerContactCollection ^ GetContacts();

[System.Security.SecurityCritical]
public System.Net.PeerToPeer.Collaboration.PeerContactCollection GetContacts ();

[<System.Security.SecurityCritical>]
member this.GetContacts : unit -> System.Net.PeerToPeer.Collaboration.PeerContactCollection

Public Function GetContacts () As PeerContactCollection

Returns

PeerContactCollection

PeerContactCollection that contains all contacts within the ContactManager of the remote peer.

If the contact manager is empty, then a collection of size zero (0) is returned.

Attributes: SecurityCriticalAttribute

Exceptions

ObjectDisposedException

This ContactManager object has been disposed.

PeerToPeerException

An invalid value was returned when this method attempted to enumerate a Peer in this peer contact collection.

Examples

The following code example illustrates how to retrieve a PeerContactCollection representing the contacts contained in the local ContactManager:

// Displays all contacts and asssociated peer endpoints (PeerEndPoint) in the PeerContactCollection.
private static void DisplayContacts(PeerContactCollection peerContactsCollection)
{
    if (peerContactsCollection == null ||
        peerContactsCollection.Count == 0)
    {
        Console.WriteLine("No contacts to display. To add a contact select option 0 from the menu.");
    }
    else
    {
        foreach (PeerContact pc in peerContactsCollection)
        {
            Console.WriteLine("The contact is: {0}", pc.DisplayName);
            DisplayEndpoints(pc.PeerEndPoints);
        }
    }
    return;
}

//------------------------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------------------------
// Displays all peer end points (PeerEndPoint) in the PeerEndPointCollection.

private static void DisplayEndpoints(PeerEndPointCollection endpointCollection)
{
    if (endpointCollection == null ||  endpointCollection.Count == 0)
    {
        Console.WriteLine("No peer endpoints in the collection to display.");
    }
    else
    {
        foreach (PeerEndPoint pep in endpointCollection)
        {
            Console.WriteLine("PeerEndPoint is: {0}", pep);
            Console.WriteLine("PeerEndPoint data is:\n  Name: {0}\n EndPoint IP address: {1}\n . Port: {2}\n",
                pep.Name,
                pep.EndPoint.Address,
                pep.EndPoint.Port);
        }
    }
    return;
}

//------------------------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------------------------
//List PeerNearMe objects that may be added as contacts.

private static void AddContact()
{
    PeerNearMeCollection pnmc = null;
    PeerContactCollection peerContacts = null;
    bool peerNameFound = false;

    PeerApplication application = null;

    try
    {
        Console.WriteLine("Listing the existing contacts...");
        peerContacts = PeerCollaboration.ContactManager.GetContacts();
    }
    catch (PeerToPeerException p2pEx)
    {
        Console.WriteLine("The Peer Collaboration Infrastructure is not responding to the contact enumeration request: {0}", p2pEx.Message);
    }
    catch (Exception ex)
    {
        Console.WriteLine("An unexpected error occurred while attempting to obtain the contact list: {0}", ex.Message);
    }

    DisplayContacts(peerContacts);

    try
    {
        //Adds one of the PeerNearMe objects as a contact.
        pnmc = GetPeersNearMe();
        Console.WriteLine("Please enter the nickname of the peer you wish to add as a contact:");
        string peerNameToAdd = Console.ReadLine();

        application = RegisterCollabApp();

        foreach (PeerNearMe pnm in pnmc)
        {
            PeerInvitationResponse res = null;
            if (pnm.Nickname.Contains(peerNameToAdd))
            {
                peerNameFound = true;
                if (!peerContacts.ToString().Contains(pnm.Nickname))
                {
                    Console.WriteLine("Adding peer {0} to the contact list.", pnm.Nickname);
                    pnm.AddToContactManager();
                }
                else
                {
                    Console.WriteLine("This peer already exists in your contact list.");
                    Console.WriteLine("Sending invitation using the Contact structure instead of the PeerNearMe.");
                    foreach (PeerContact pc in peerContacts)
                    {
                        if (pc.Nickname.Equals(pnm.Nickname))
                        {
                            res = pnm.Invite(application, "Peer Collaboration Sample", application.Data);
                            if (res.PeerInvitationResponseType == PeerInvitationResponseType.Accepted)
                            {
                                Console.WriteLine("Invitation to contact succeeded.");
                            }
                            else
                            {
                                Console.WriteLine("Invitation to contact {0}.", res.PeerInvitationResponseType);
                            }
                        }
                    }
                }
            }
        }

        if (!peerNameFound)
        {
            Console.WriteLine("No such peer exists near you. Cannot add to contacts.");
            return;
        }

        peerContacts = PeerCollaboration.ContactManager.GetContacts();

        Console.WriteLine("Listing the contacts again...");
        DisplayContacts(peerContacts);
    }
    catch (Exception ex)
    {
        Console.WriteLine("Error adding a contact: {0}", ex.Message);
    }
    finally
    {
        application.Dispose();
    }
    return;
}

Remarks

Calling this method requires a PermissionState of Unrestricted.

Applies to

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