WF Codelab：InvokeWorkflowActivity

InvokeWorkflow活动可以异步的执行另一个工作流.

 

               

InvokeWorkflowActivity invokeNewStepWorkflow = new InvokeWorkflowActivity();



// use WorkflowChanges class to author dynamic change

            WorkflowChanges changes = new WorkflowChanges(this);



// setup to invoke NewStepWorkflow type

            Type type = typeof(DynamicUpdateInWorkflow.Workflow2);



//another workflow 

            invokeNewStepWorkflow.Name = "Workflow2";

invokeNewStepWorkflow.TargetWorkflow = type;



// insert invokeNewStepWorkflow in ifElseApproval 

// transient activity collection



CompositeActivity ifElse = changes.TransientWorkflow.Activities["ifElseActivity1"] as CompositeActivity;

CompositeActivity branch1 = ifElse.Activities["ifElseBranchActivity1"] as CompositeActivity;

branch1.Activities.Add(invokeNewStepWorkflow);



// apply transient changes to instance

            this.ApplyWorkflowChanges(changes);

 

但是执行过程是异步的,无法直接获取另一个工作流的输出参数,（可以通过宿主建立额外的通信机制来获取其输出）.

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