PublishSubscribeSession.BeginSubscribe(AsyncCallback, Object) Method
Definition
Important
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Begins an asynchronous operation to subscribe to the presence session.
public:
virtual IAsyncResult ^ BeginSubscribe(AsyncCallback ^ userCallback, System::Object ^ state);public virtual IAsyncResult BeginSubscribe (AsyncCallback userCallback, object state);abstract member BeginSubscribe : AsyncCallback * obj -> IAsyncResult
override this.BeginSubscribe : AsyncCallback * obj -> IAsyncResultPublic Overridable Function BeginSubscribe (userCallback As AsyncCallback, state As Object) As IAsyncResultParameters
- userCallback
- AsyncCallback
The method to be called when the asynchronous operation is completed.
- state
- Object
A user-provided object that distinguishes this particular asynchronous operation from other asynchronous operations.
Returns
An IAsyncResult that references the asynchronous operation.
Exceptions
Thrown when the subscription is not in a valid state.
Remarks
UCMA allows subscription to be reused. Hence, the application can re-subscribe to the same subscription after it has been unsubscribed.