PeerNameResolver.ResolveAsync Method (PeerName, Cloud, Int32, Object)


Begins an asynchronous peer name resolution operation for the specified PeerName in the specified Cloud. The resolution operation will resolve no more than maxRecords entries for the specified peer name.

Namespace:   System.Net.PeerToPeer
Assembly:  System.Net (in System.Net.dll)

<HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading := True)>
Public Sub ResolveAsync (
	peerName As PeerName,
	cloud As Cloud,
	maxRecords As Integer,
	userState As Object


Type: System.Net.PeerToPeer.PeerName

The peerName to resolve.

Type: System.Net.PeerToPeer.Cloud

The cloud in which to resolve peerName.

Type: System.Int32

The maximum number of records to obtain from cloud for peerName.

Type: System.Object

A user-defined object that contains information about the peer name resolution operation.

Exception Condition

One or both of the peerName and userState parameters are set to null.


One or more supplied parameters are invalid.


Successful completion of this operation requires at least one event handler.


The maxRecords parameter is less than or equal to zero.

For unsecured peer names, the same name can be registered (and associated with different endpoints) by different peers within the same cloud.

This method raises the ResolveCompleted event, which calls back to the OnResolveCompleted method. Or, it raises the ResolveProgressChanged event, which calls back to the OnResolveProgressChanged method.

If the Cloud parameter is null, the name is resolved using the Available shortcut, which initializes default values for the Name, Scope, and ScopeId properties.

For every ResolveAsync method, there is an equivalent Resolve method. Their parameter lists are identical, except that the ResolveAsync method includes a system token for asynchronous event handling, and the Resolve method is intended for synchronous processing.

All asynchronous references to the peer resolver object are coordinated with a unique identifier token Object. This userState token or message identifier allows an operating system to deliver a message to a single receiving process after the message has been placed on the message queue.

The ResolveCompleted event will be raised if the resolve operation completes in error or is canceled.

.NET Framework
Available since 3.5
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