CallControlEventActivity.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) _
)
'Usage
Dim parentContext As ActivityExecutionContext
Dim parentEventHandler As IActivityEventListener(Of QueueEventArgs)

Me.Subscribe(parentContext, parentEventHandler)

protected virtual void Subscribe(
    ActivityExecutionContext parentContext,
    IActivityEventListener<QueueEventArgs> parentEventHandler
)

Parameters

• parentContext
  Type: System.Workflow.ComponentModel.ActivityExecutionContext

• parentEventHandler
  Type: System.Workflow.ComponentModel.IActivityEventListener<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.

See Also

Reference

CallControlEventActivity Class

CallControlEventActivity Members

Microsoft.Rtc.Workflow.Activities Namespace