TimerEventSubscriptionCollection.Add(TimerEventSubscription) Method

Definition

Namespace:

System.Workflow.Runtime

Assembly:

System.Workflow.Runtime.dll

Adds a TimerEventSubscription to the timer queue.

public:
 void Add(System::Workflow::Runtime::TimerEventSubscription ^ item);

public void Add (System.Workflow.Runtime.TimerEventSubscription item);

member this.Add : System.Workflow.Runtime.TimerEventSubscription -> unit

Public Sub Add (item As TimerEventSubscription)

Parameters

item

TimerEventSubscription

The TimerEventSubscription to add to the timer queue.

Exceptions

ArgumentNullException

item is a null reference (Nothing in Visual Basic).

Remarks

Adds the TimerEventSubscription to the timer queue. Subscriptions in the queue are positioned based on their TimerEventSubscription.ExpiresAt values; those with smaller values are positioned in front of those with larger values. If the new subscription is added at the beginning of the queue, WorkflowSchedulerService.Cancel is called to cancel the timer event that was previously at the beginning of the queue and WorkflowSchedulerService.Schedule(WaitCallback, Guid, DateTime, Guid) is called to schedule the new timer event. Add locks the TimerEventSubscriptionCollection before adding the new subscription and is, therefore, thread safe.