创建长期运行的工作流服务

Question

I'm trying to follow this tutorial On MSDN in order to learn more about workflow services and how they work. Now I'm possibly crazy but I'm having problems with the client section of the tutorial (I'm tempted to blame the tutorial and not myself for this issue). I'm getting refrence errors on the StartOrderClient initialization and the AddItemClient. Is this just a case of a slightly incomplete step in the tutorial or am I missing something?

I thank you greatly in advance.

Below is my Order Client Console Program

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ServiceModel;
using System.ServiceModel.Activities;

namespace OrderClient.OrderService
{
    class Program
    {
        static void Main(string[] args)
        {
            // Send initial message to start the workflow service
            Console.WriteLine("Sending start message");
            StartOrderClient startProxy = new StartOrderClient();
            string orderId = startProxy.StartOrder("Kim Abercrombie");

            // The workflow service is now waiting for the second message to be sent
            Console.WriteLine("Workflow service is idle...");
            Console.WriteLine("Press [ENTER] to send an add item message to reactivate the workflow service...");
            Console.ReadLine();

            // Send the second message
            Console.WriteLine("Sending add item message");
            AddItemClient addProxy = new AddItemClient();
            AddItem item = new AddItem();
            item.p_itemId = "Zune HD";
            item.p_orderId = orderId;

            string orderResult = addProxy.AddItem(item);
            Console.WriteLine("Service returned: " + orderResult);
        }
    }
}

Here are the errors. StartOrderClient and AddItemClient which I don't believe get defined in the tutorial.

The type or namespace name 'StartOrderClient' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'AddItemClient' could not be found (are you missing a using directive or an assembly reference?)

Answer 1

To resolve the error, open up the Service1.xamlx file. Click on ReceiveStartOrder and change the ServiceContractName property to {http://tempuri.org/}IStartOrder (it is usually {http://tempuri.org/}IService} by default). Do the same thing for the ReceiveAddItem activity ( IAddItem ).

Rebuild the solution. In the console project, right-click the OrderService service reference and update it.

Note: the tutorial is filled with errors, and I'm still working through it. Once I successfully complete it and document the missing steps and inaccuracies, I will update this answer and may include a blog post link with a revised tutorial.

For anyone attempting to do this tutorial, a better option is to follow this updated tutorial .

Answer 2

I use this code for main method

static void Main(string[] args)
    {
        // Send initial message to start the workflow service
        Console.WriteLine("Sending start message");

        ServiceClient proxy = new ServiceClient();
        string orderId = proxy.StartOrder("Kim Abercrombie");

        // The workflow service is now waiting for the second message to be sent
        Console.WriteLine("Workflow service is idle...");
        Console.WriteLine("Press [ENTER] to send an add item message to reactivate the workflow service...");
        Console.ReadLine();

        // Send the second message
        Console.WriteLine("Sending add item message");
        AddItem item = new AddItem();
        item.p_itemId = "Zune H";
        item.p_orderId = orderId;

        string orderResult = proxy.AddItem(item);
        Console.WriteLine("Service returned: " + orderResult);
    }