UserEndpointPresenceServices.BeginUpdatePresenceState Method
Begins an asynchronous operation to publish the user or endpoint presence state.
Namespace: Microsoft.Rtc.Collaboration
Assembly: Microsoft.Rtc.Collaboration (in Microsoft.Rtc.Collaboration.dll)
Syntax
'Declaration
Public Function BeginUpdatePresenceState ( _
newState As PresenceState, _
userCallback As AsyncCallback, _
state As Object _
) As IAsyncResult
'Usage
Dim instance As UserEndpointPresenceServices
Dim newState As PresenceState
Dim userCallback As AsyncCallback
Dim state As Object
Dim returnValue As IAsyncResult
returnValue = instance.BeginUpdatePresenceState(newState, _
userCallback, state)
public IAsyncResult BeginUpdatePresenceState(
PresenceState newState,
AsyncCallback userCallback,
Object state
)
Parameters
- newState
Type: Microsoft.Rtc.Collaboration.Presence.PresenceState
New user state for the endpoint, must be of type UserState or EndpointState.
- userCallback
Type: System.AsyncCallback
The method to be called when the asynchronous operation is completed.
- state
Type: System.Object
A user-provided object that distinguishes this particular asynchronous operation from other asynchronous operations.
Return Value
Type: System.IAsyncResult
An IAsyncResult that references the asynchronous operation.
Exceptions
| Exception | Condition |
|---|---|
| InvalidOperationException | Thrown when the endpoint is not in the "registered" state, or the current state of LocalOwnerPresence is not "subscribed". |
| ArgumentNullException | Thrown when newState passed is null. |
| ArgumentException | Thrown when newState is not of type UserState or EndpointState. |
See Also
Reference
UserEndpointPresenceServices Class
UserEndpointPresenceServices Members