ContactManager Class

Definition

Namespace:

System.Net.PeerToPeer.Collaboration

Assembly:

System.Net.dll

Represents a collection of PeerContact objects which persist in a Windows Address Book.

public ref class ContactManager sealed : IDisposable

public sealed class ContactManager : IDisposable

type ContactManager = class
    interface IDisposable

Public NotInheritable Class ContactManager
Implements IDisposable

Inheritance

Object

ContactManager

Implements

IDisposable

Examples

The following example code illustrates how to enumerate a PeerNearMe and add it as a PeerContact to 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

This class has no public constructors, since a reference to it is returned by the PeerCollaboration class.

Address books that are associated with PeerContact management include those associated with the host peer and a remote peer. Either computer may collaborate with other peers; when a peer is local to the remote peer but not the host peer, it can be added to the ContactManager of the host peer. Certain operations on the ContactManager class, such as AddContact and DeleteContact, correlate to the associated operations being performed on the Windows Address book of the remote peer.

The host peer has access to this persistent storage for PeerContact information, which can be associated with the applications in which a peer intends to participate. A PeerApplication can identify itself as a user of a ContactManager persistent store on a computer.

Properties

LocalContact	Gets the PeerContact representing the local peer.
SynchronizingObject	When this property value is set, all events not fired as the result of an asynchronous operation will have the associated event handlers called back on the thread that created the specific SynchronizingObject.

Methods

AddContact(PeerContact)	Adds the specified PeerContact to the ContactManager of the local peer.
CreateContact(PeerNearMe)	Creates a PeerContact instance for the specified PeerNearMe object.
CreateContactAsync(PeerNearMe, Object)	Creates a contact instance for the specified PeerNearMe object.
DeleteContact(PeerContact)	Removes the specified PeerContact from the ContactManager of the local peer.
DeleteContact(PeerName)	Removes the PeerContact associated with the specified PeerName from the ContactManager of the local peer.
Dispose()	Releases all resources used by the ContactManager object.
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetContact(PeerName)	Returns the PeerContact object for the specified PeerName.
GetContacts()	Returns a PeerContactCollection that contains all contacts within the ContactManager of the remote peer.
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)
UpdateContact(PeerContact)	Updates the data associated with the PeerContact.

Events

ApplicationChanged	Raised whenever a PeerApplication associated with a PeerContact in the ContactManager has changed.
CreateContactCompleted	Raised whenever a CreateContact(PeerNearMe) method has completed.
NameChanged	Raised whenever the PeerName associated with a PeerContact in the ContactManager has changed.
ObjectChanged	Raised whenever an object within a contact's registered PeerObject objects has changed.
PresenceChanged	Raised whenever the presence status of a PeerContact in the ContactManager has changed.
SubscriptionListChanged	Raised when the list of subscribed contacts changes.

See also

• GetContact(PeerName)
• CreateContact(PeerNearMe)
• UpdateContact(PeerContact)