protected override ActivityExecutionStatus Execute(ActivityExecutionContext aec)
{
//get the services needed
//custom service to run the workflow
SubWorkflowService ws = aec.GetService <SubWorkflowService>();
//Queuing service to setup the queue so the service can "callback"
WorkflowQueuingService qs = aec.GetService <WorkflowQueuingService>();
//create the queue the service can call back on when the child workflow is done
//you might want the queuename to be something different
string qn = String.Format("{0}:{1}:{2}:ThisIsSubWorkflowSupportForkJoin", this.WorkflowInstanceId.ToString(), Type.Name, this.Name);
WorkflowQueue q = qs.CreateWorkflowQueue(qn, false);
q.QueueItemAvailable += new EventHandler <QueueEventArgs>(q_QueueItemAvailable);
//copy the params to a new collection
Dictionary <string, object> inparams = new Dictionary <string, object>();
foreach (WorkflowParameterBinding bp in this.Parameters)
{
PropertyInfo pi = Type.GetProperty(bp.ParameterName);
if (pi.CanWrite)
{
inparams.Add(bp.ParameterName, bp.Value);
}
}
//ask the service to start the workflow
ws.StartWorkflow(Type, inparams, this.WorkflowInstanceId, qn, aec);
return(ActivityExecutionStatus.Executing);
}
protected void Application_Start(object sender, EventArgs e)
{
// create an instance of workflow runtime, loading settings from web.config
WorkflowRuntime workflowRuntime = new WorkflowRuntime(WorkflowManager.WorkflowRuntimeKey);
// add the external data exchange service to the runtime to allow for local services
ExternalDataExchangeService exchangeService = new ExternalDataExchangeService(WorkflowManager.LocalServicesKey);
CustomConditionsService condServ = new CustomConditionsService();
SubWorkflowService serv = new SubWorkflowService(); // This is for Sub workflow service
workflowRuntime.AddService(exchangeService);
workflowRuntime.AddService(serv);
workflowRuntime.AddService(condServ);
// start the workflow runtime
workflowRuntime.StartRuntime();
// save the runtime for use by the entire application
Application[WorkflowManager.WorkflowRuntimeKey] = workflowRuntime;
}
void q_QueueItemAvailable(object sender, QueueEventArgs e)
{
ActivityExecutionContext aec = sender as ActivityExecutionContext;
if (aec != null)
{
WorkflowQueuingService qs = aec.GetService <WorkflowQueuingService>();
WorkflowQueue q = qs.GetWorkflowQueue(e.QueueName);
//get the outparameters from the workflow
object o = q.Dequeue();
//delete the queue
Exception ex = o as Exception;
if (ex != null)
{
throw ex;
}
qs.DeleteWorkflowQueue(e.QueueName);
Dictionary <string, object> outparams = o as Dictionary <string, object>;
if (outparams != null)
{
foreach (KeyValuePair <string, object> item in outparams)
{
if (this.Parameters.Contains(item.Key))
{
//modify the value
this.Parameters[item.Key].SetValue(WorkflowParameterBinding.ValueProperty, item.Value);
}
}
}
aec.CloseActivity();
///
SubWorkflowService ws = aec.GetService <SubWorkflowService>();
ws.OnFinishCallworkflowActivity(this.WorkflowInstanceId);
}
}