Activity.Execute(ActivityExecutionContext) 方法

定義

命名空間:

System.Workflow.ComponentModel

組件:

System.Workflow.ComponentModel.dll

由工作流程執行階段呼叫以執行活動。

protected public:
 virtual System::Workflow::ComponentModel::ActivityExecutionStatus Execute(System::Workflow::ComponentModel::ActivityExecutionContext ^ executionContext);

protected internal virtual System.Workflow.ComponentModel.ActivityExecutionStatus Execute (System.Workflow.ComponentModel.ActivityExecutionContext executionContext);

abstract member Execute : System.Workflow.ComponentModel.ActivityExecutionContext -> System.Workflow.ComponentModel.ActivityExecutionStatus
override this.Execute : System.Workflow.ComponentModel.ActivityExecutionContext -> System.Workflow.ComponentModel.ActivityExecutionStatus

Protected Friend Overridable Function Execute (executionContext As ActivityExecutionContext) As ActivityExecutionStatus

參數

executionContext

ActivityExecutionContext

ActivityExecutionContext，與這個 Activity 和執行相關聯。

傳回

ActivityExecutionStatus

執行工作的 ActivityExecutionStatus，可判斷活動停留在執行狀態，或轉換為已關閉狀態。

範例

下列程式碼範例示範 Execute 方法的實作。 在此範例中，會建構並傳送 Outlook 電子郵件訊息。 這個範例來自 Outlook Workflow Wizard SDK 範例。 如需詳細資訊，請參閱 Outlook 工作流程精靈範例。

protected override ActivityExecutionStatus Execute(ActivityExecutionContext context)
{
    // Create an Outlook Application object.
    Outlook.Application outlookApp = new Outlook.Application();

    Outlook._MailItem oMailItem = (Outlook._MailItem)outlookApp.CreateItem(Outlook.OlItemType.olMailItem);
    oMailItem.To = outlookApp.Session.CurrentUser.Address;
    oMailItem.Subject = "Auto-Reply";
    oMailItem.Body = "Out of Office";

    //adds it to the outbox
    if (this.Parent.Parent is ParallelActivity)
    {
        if ((this.Parent.Parent.Parent.Activities[1] as DummyActivity).TitleProperty != "")
        {
            MessageBox.Show("Process Auto-Reply for Email");
            oMailItem.Send();
        }
    }
    else if (this.Parent.Parent is SequentialWorkflowActivity)
    {
        if ((this.Parent.Parent.Activities[1] as DummyActivity).TitleProperty != "")
        {
            MessageBox.Show("Process Auto-Reply for Email");
            oMailItem.Send();
        }
    }
    return ActivityExecutionStatus.Closed;
}

Protected Overrides Function Execute(ByVal executionContext As System.Workflow.ComponentModel.ActivityExecutionContext) As System.Workflow.ComponentModel.ActivityExecutionStatus
    ' Create an Outlook Application object. 
    Dim outlookApp As Outlook.Application = New Outlook.Application()

    Dim oMailItem As Outlook._MailItem = CType(outlookApp.CreateItem(Outlook.OlItemType.olMailItem), Outlook._MailItem)
    oMailItem.MailTo = outlookApp.Session.CurrentUser.Address
    oMailItem.Subject = "Auto-Reply"
    oMailItem.Body = "Out of Office"

    Dim dummy As Activity

    If TypeOf Me.Parent.Parent Is ParallelActivity Then
        dummy = Me.Parent.Parent.Parent.Activities.Item(1)
        If Not (CType(dummy, DummyActivity).Title = "") Then
            MessageBox.Show("Process Auto-Reply for Email")
            oMailItem.Send()
        End If
    End If
    If TypeOf Me.Parent.Parent Is SequentialWorkflowActivity Then
        dummy = Me.Parent.Parent.Activities.Item(1)
        If Not (CType(dummy, DummyActivity).Title = "") Then
            MessageBox.Show("Process Auto-Reply for Email")
            oMailItem.Send()
        End If
    End If

    Return ActivityExecutionStatus.Closed
End Function

備註

ActivityExecutionContext 用於取得目前執行活動和工作階段的相關資訊，也用於從執行階段環境取得服務。

執行會同步發生，當活動完成或達到中繼狀態時會將控制項傳回至呼叫者。