Subscribe Method
Creates the queue for the event represented in the CallControlEventActivity class.
Namespace: Microsoft.Rtc.Workflow.Activities
Assembly: Microsoft.Rtc.Workflow (in Microsoft.Rtc.Workflow.dll)
Syntax
'Declaration
Protected Overridable Sub Subscribe ( _
parentContext As ActivityExecutionContext, _
parentEventHandler As IActivityEventListener(Of QueueEventArgs) _
)
protected virtual void Subscribe(
ActivityExecutionContext parentContext,
IActivityEventListener<QueueEventArgs> parentEventHandler
)
protected:
virtual void Subscribe(
ActivityExecutionContext^ parentContext,
IActivityEventListener<QueueEventArgs^>^ parentEventHandler
)
function subscribe(parentContext, parentEventHandler);
Parameters
- parentContext
Type: ActivityExecutionContext
- parentEventHandler
Type: IActivityEventListener<(Of <(QueueEventArgs>)>)
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | Thrown if the argument is null. |
| InvalidOperationException | Thrown if retrieving CommunicationsWorkflowRuntimeService fails. |
| InvalidOperationException | Thrown if CallProvider or CallProvider.Call is null. |
| InvalidOperationException | Thrown if CallProvider.Call is not AudioVideoCall. |