我正在尝试将
Windows工作流程作为Web服务托管,下面是我构建的示例工作流程,并希望作为Web服务(.svc)托管,是否可以建议所需的步骤？
using System;
using System.ServiceModel.Activities;
using System.Activities;
using System.ServiceModel;
using System.Activities.Statements;
namespace DemoWF
{
public class _25_LeaveRequest
{
public WorkflowService GetInstance()
{
WorkflowService service;
Variable<int> empID = new Variable<int> { Name = "empID" };
Variable<int> requestID = new Variable<int> { Name = "requestID" };
Receive receiveLeaveRequest = new Receive
{
ServiceContractName = "ILeaveRequestService",OperationName = "ApplyLeave",CanCreateInstance = true,Content = new ReceiveParametersContent
{
Parameters ={
{"empID",new OutArgument<int>(empID)}
}
}
};
SendReply replyLeaveRequestID = new SendReply
{
Request = receiveLeaveRequest,Content = new SendParametersContent
{
Parameters ={
{"requestID",new InArgument<int>(requestID)},},};
Sequence workflow = new Sequence()
{
Variables = { empID,requestID },Activities = {
new WriteLine{Text="WF service is starting..."},receiveLeaveRequest,new WriteLine{
Text=new InArgument<string>(aec=> "Emp ID="+empID.Get(aec).ToString())
},new Assign<int>{
Value=new InArgument<int>(5),To=new OutArgument<int>(requestID)
},new WriteLine{
Text=new InArgument<string>(aec=> "Request ID="+requestID.Get(aec).ToString())
},replyLeaveRequestID
},};
service = new WorkflowService
{
Name = "AddService",Body = workflow
};
return service;
}
}
现在,它是自我托管的,如下所示
namespace DemoWF
{
class Program
{
static void Main(string[] args)
{
LeaveRequest();
}
private static void LeaveRequest()
{
_25_LeaveRequest receiveAndReplyWorkflow = new _25_LeaveRequest();
WorkflowService wfService = receiveAndReplyWorkflow.GetInstance();
Uri address = new Uri("http://localhost:8000/WFServices");
WorkflowServiceHost host = new WorkflowServiceHost(wfService,address);
try
{
Console.WriteLine("opening Service...");
host.Open();
Console.WriteLine("WF service is listening on " + address.ToString() + ",press any key to close");
Console.ReadLine();
}
catch (Exception e)
{
Console.WriteLine("some thing bad happened" + e.StackTrace);
}
finally
{
host.Close();
}
}
}
}
最快的方法是创建WCF工作流服务应用程序.
您将获得一个工作流设计器,您可以在其中拖放所需的活动：
如果您在Visual Studio中运行该项目,您将获得一个自动生成的WSDL与您的服务操作：
它还将调出Visual Studio的WCF测试客户端工具：
您可以使用“Pick Branch”活动创建一个基于工作流的服务来处理多种方法.然后,每个分支将具有“接收和发送回复”活动,其中接收活动移动到触发部分,并且动作部分中的发送回复活动.
每个触发器都用于服务的特定操作.在下面的示例中,我定义了两个操作：MyFirstOperation和MySecondOperation.
以下是WCF测试客户端工具将显示的工作流程中显示的多个操作：
希望这能让你开始.站起来基于工作流程的WCF服务的主题可以非常复杂.
