WorkflowApplication.Persist Method ()

.NET Framework (current version)

Persists a workflow instance to an instance store.

Namespace:   System.Activities
Assembly:  System.Activities (in System.Activities.dll)

Public Sub Persist

If the persist operation does not complete within 30 seconds, a TimeoutException is thrown.

If the workflow instance was previously loaded from persistence, then the same InstanceStore used to load the workflow is used for persistence. If the workflow was created and has not yet been persisted, then an InstanceStore must be configured before calling this method or else an InvalidOperationException is thrown when this method is called.

The following example calls Persist to persist a workflow instance before the workflow is started. This example is part of the StartAndUnloadInstance method in the Persisting a Workflow Application sample.

WorkflowApplication application = new WorkflowApplication(activity);

application.InstanceStore = instanceStore;

//returning IdleAction.Unload instructs the WorkflowApplication to persists application state and remove it from memory  
application.PersistableIdle = (e) =>
    return PersistableIdleAction.Unload;

application.Unloaded = (e) =>

//This call is not required 
//Calling persist here captures the application durably before it has been started
id = application.Id;


.NET Framework
Available since 4.0
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