是否可以在 MethodInvoking 事件处理程序中取消工作流活动？
我有一个带有 SendEmail 活动的 SharePoint 工作流。我使用 MethodInvoking 事件处理程序来设置 To 属性。
但是，有时工作流不应尝试发送电子邮件，因为没有电子邮件地址。我可以在 MethodInvoking 事件处理程序中检测到这种情况。是否可以跳过 SendEmail 活动并继续下一个活动？
我知道我可以将 IfElseActivity 放在 SendEmail 之前，但我正在寻找一种取消活动执行的方法。
I have a SharePoint workflow with a SendEmail activity. I use the MethodInvoking event handler to set the To property.
However, sometimes the workflow should not try to send an e-mail, because there is no e-mail address. I can detect such a condition in the MethodInvoking event handler. Is it possible to skip the SendEmail activity and proceed to the next one?
I know I can put IfElseActivity before SendEmail, but I am looking for a way to cancel activity execution.
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从SDK来看，所有的Activity都有一个Canceling事件。然而，我发现的似乎表明，只有当整个工作流程遇到错误或被取消时，活动才会被取消。您似乎无法手动取消单个活动（我不确定工作流程是否知道下一步要做什么）。因此，IfElse 分支或 ConditionedActivityGroup 可能是您最好的选择。
From looking at the SDK, all activities have a Cancelling event. However, what I find seems to suggest that an activity is only cancelled if the entire workflow hits an error or is cancelled. It does not appear that you can manually cancel a single activity (I'm not sure the workflow would know what to do next). So an IfElse branch, or a ConditionedActivityGroup, would probably be your best shot.