WorkflowInstance.Load 方法

定義

命名空間:

System.Workflow.Runtime

組件:

System.Workflow.Runtime.dll

載入之前卸載的工作流程執行個體。

public:
 void Load();

public void Load ();

member this.Load : unit -> unit

Public Sub Load ()

例外狀況

InvalidOperationException

工作流程執行階段引擎不在執行中。

範例

下列程式碼範例將示範如何載入之前卸載的 物件。

// Create a WorkflowRuntime object
WorkflowRuntime workflowRuntime = new WorkflowRuntime();
// Create a new instance of the out-of-box SqlWorkflowPersistenceService
SqlWorkflowPersistenceService persistenceService =
   new SqlWorkflowPersistenceService(
   "Initial Catalog=SqlPersistenceService;Data Source=localhost;Integrated Security=SSPI;");
// Add the service to the runtime
workflowRuntime.AddService(persistenceService);
// Create a WorkflowInstance object
WorkflowInstance workflowInstance = workflowRuntime.CreateWorkflow(typeof(Workflow1));
// Start the workflow instance
workflowInstance.Start();
//Unload the instance
workflowInstance.Unload();
//Reload the previously unloaded instance
workflowInstance.Load();

' Create a WorkflowRuntime object
Dim workflowRuntime As New WorkflowRuntime()
' Create a new instance of the out-of-box SqlWorkflowPersistenceService
Dim persistenceService As _
   New SqlWorkflowPersistenceService( _
   "Initial Catalog=SqlPersistenceServiceData Source=localhostIntegrated Security=SSPI")
' Add the service to the runtime
workflowRuntime.AddService(persistenceService)
' Create a WorkflowInstance object
Dim workflowInstance As WorkflowInstance = workflowRuntime.CreateWorkflow(GetType(Workflow1))
' Start the workflow instance
workflowInstance.Start()
'Unload the instance
workflowInstance.Unload()
'Reload the previously unloaded instance
workflowInstance.Load()

備註

Load 是同步的，如果可以載入工作流程執行個體，Load 將在工作流程執行個體載入記憶體並由工作流程執行階段引擎排程後傳回。 執行階段會在持續性服務還原記憶體中的工作流程執行個體後，但是在工作流程執行階段引擎排程執行個體之前引發 WorkflowLoaded 事件。