2

我无法在我的工作流的代码活动中获取工作流实例。如何获取它?我确实检查了WorkflowEventArgs.WorkflowInstance 属性,但在我的代码活动中我没有WorkflowEventArgs。相反,我有EventArgs

我正在尝试做的事情:

基本上,我需要访问工作流队列数据以获取队列中的值。在上面的 url 中,代码是相同的,但它不在代码活动中?访问队列的正确方法是什么?

4

2 回答 2

2

获取您的工作流实例

public sealed class LogState : CodeActivity
{
    protected override void Execute(CodeActivityContext context)
    {
        Guid instanceId = context.WorkflowInstanceId;
        var connection = ConfigurationManager.ConnectionStrings["ConnectionString"];


        WorkflowInstanceProxy proxy = context.GetExtension<WorkflowInstanceInfo>().GetProxy();
        //...
    }

    protected override void CacheMetadata(CodeActivityMetadata metadata)
    {
        base.CacheMetadata(metadata);
        metadata.AddDefaultExtensionProvider<WorkflowInstanceInfo>(() => new WorkflowInstanceInfo());
    }

    public class WorkflowInstanceInfo : IWorkflowInstanceExtension
    {
        WorkflowInstanceProxy proxy;

        public IEnumerable<object> GetAdditionalExtensions()
        {
            yield break;
        }

        public void SetInstance(WorkflowInstanceProxy instance)
        {

            this.proxy = instance;
        }

        public WorkflowInstanceProxy GetProxy() { return proxy; }
    }
于 2013-04-26T22:11:20.183 回答
1

我对你的问题有点困惑。这是你想要的吗?

public sealed class GetWorkflowIdActivity : CodeActivity<string>
{
    protected override string Execute(CodeActivityContext context)
    {
        return context.WorkflowInstanceId.ToString();
    }
}
于 2010-08-23T13:03:08.890 回答