PublishSubscribeSession.BeginSubscribe(AsyncCallback, Object) Method

Reference

Definition

Namespace:: Microsoft.Rtc.Collaboration.Presence

Assembly:: Microsoft.Rtc.Collaboration.dll

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 -> IAsyncResult

Public Overridable Function BeginSubscribe (userCallback As AsyncCallback, state As Object) As IAsyncResult

Parameters

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

IAsyncResult

An IAsyncResult that references the asynchronous operation.

Exceptions

InvalidOperationException

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.

Applies to

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