In a workflow, to call the external method, you need the following ready.
- The workflow need a interface marked with ExternalDataExchange. In the callExternalMethodActivity node, you need to configure the InterfaceType, MethodName, MethodInvoking, and what value to be used as passed-in parameter.
- In workflow host, you need to config the workflow runtime to service the ExternalService. When a workflow instance execute an callExternalMethodActivity, it will ask the workflow runtime to supply a service.
//workflow definition [ExternalDataExchange] public interface ICustomerService { void SendCustomerData(string customerName); } //host enviroment code public class CustomerService : ICustomerService { public void SendCustomerData(string customerName) { Console.WriteLine(customerName); } } ExternalDataExchangeService xchangeSvc = new ExternalDataExchangeService(); workflowRuntime.AddService(xchangeSvc); CustomerService custSvc = new CustomerService(); xchangeSvc.AddService(custSvc);
No comments:
Post a Comment