SharePoint：在 StartWorkflow() 终止后访问工作流变量

Question

我通过调用workflowManager.StartWorkflow() 以编程方式从SharePoint 事件接​​收器运行SharePoint 工作流。

工作流在执行过程中设置一些工作流变量。有没有办法在工作流终止后访问这些变量的最后一个值（例如，对 StartWorkflow() 的调用返回）？

这是我的示例代码，展示了我的意图：

    public override void ItemAdded(SPItemEventProperties properties)
    {
        SPWorkflow workflow = null;
        SPWorkflowManager workflowManager = null;
        try
        {
            base.ItemAdded(properties);

            workflowManager = properties.OpenWeb().Site.WorkflowManager;
            var workflowAssociation = properties.ListItem.ParentList.WorkflowAssociations[0];

            workflow = workflowManager.StartWorkflow(properties.ListItem, workflowAssociation, "<Data></Data>");

            // I can read any fields that were updated by the WF
            SPListItem item = properties.ListItem.ParentList.GetItemById(properties.ListItemId);
            string validationResult = (string) item["ValidationResult"];

            // how can I access any workflow variables created during execution?
        }
        catch (Exception ex)
        {
            Debug.WriteLine(ex);
            if (workflow != null && workflowManager != null)
            {
                SPWorkflowManager.CancelWorkflow(workflow);
            }
            throw;
        }
   }

Answer 1

也许将它们写到列表中？这可能是您最不混乱的选择。

或者，有一个 SPWorkflow.Xml 属性“返回一个以 XML 格式表示工作流实例的字符串”，但我从未尝试过。尽管将其传回 SharePoint 可能会很尴尬。