        var workflow = new Sequence();           
        Variable<Dictionary<string,object>> variable = new Variable<Dictionary<string,object>>
        {
            Name = "SharedData"
        };
        workflow.Variables.Add(variable);
        foreach (MyCustomActivity activity in mAddedActivities)
        {                
            workflow.Activities.Add(activity);                                      
        }

        WorkflowInvoker invoker = new WorkflowInvoker(workflow);
        invoker.Invoke();

这就是我在实际实现中所做的，不需要任何入参数/出参数，变量“共享数据”足以跨活动保存数据。

现在，在覆盖的代码活动"Execute“方法中的每个活动级别，您必须使用此代码摘录来获取输入/获取此工作流变量"SharedData”的值。

        WorkflowDataContext dataContext = context.DataContext;
        PropertyDescriptorCollection propertyDescriptorCollection = dataContext.GetProperties();
        foreach (PropertyDescriptor propertyDesc in propertyDescriptorCollection)
        {
            if (propertyDesc.Name == "SharedData")
            {
                myData = propertyDesc.GetValue(dataContext) as Dictionary<string, object>;
                if (myData == null) //this to check if its the initial(1st) activity.
                    myData = new Dictionary<string, object>();
                //I'm adding here an additional value into the workflow variable 
                //its having signature same as that of workflow variable
                //dictionary's key as what it is and value as an object
                //which user can cast to what actually one wants.
                myData.Add("islogonrequired", Boolean.TrueString);


                //here I'm fetching some value, as i entered it in my previous activity. 
                string filePath = myData["filepath"].ToString();
                propertyDesc.SetValue(dataContext, myData);
                break;
            }
        }

希望这能对其他人有所帮助。感谢其他所有人的帮助和支持。

票数 3

Stack Overflow用户

发布于 2011-09-13 20:10:20

        var workflow = new Sequence();
        //Variable<string> v = new Variable<string>
        //{
        //    Name = "str" 
        //};

        //workflow.Variables.Add(v);

        Dictionary<string, object> abc = new Dictionary<string, object>();
        abc.Add("thedata", "myValue");

        foreach (MyCustomActivity activity in mAddedActivities)
        {
            if (activity.ActivityResult == null)
                activity.ActivityResult = new Dictionary<string, object>();
            activity.ActivityResult = abc;                
            workflow.Activities.Add(activity);

            //new Assign<string>
            //           {
            //               To = v,
            //               Value = activity.ActivityResult["thedata"].ToString()
            //           };                

        }
        WorkflowInvoker invoker = new WorkflowInvoker(workflow);
        invoker.Invoke();