Web Services in Messaging - Part II

Building the Solution

1. The first thing that you should do is launch Visual Studio and create an empty Solution name WebMessaging.
2. In the WebMessaging solution, create a ASP.Net Web Service Project. Call this web service ‘MyWebService’. I’ll assume that this web serive runs of local host in this example, but there may well be ports etc involved depending on how you set the project up.
   
3. In the WebMessaging solution, create and empty BizTalk Server project and name it ‘MyBizTalkSample’.
4. We’ll build the web service first, as this make more sense to me.
   1. Open up service.cs and create a new class name ‘OrderStatusUpdate’. This class will have two properties: the order Id; the order status. You can use the following code below for the class (notice that it must be serializable):
      [Serializable]
      public class OrderStatusUpdate
      {
          private Guid ordered;
          private int orderStatus;
      
          public Guid OrderId
          {
              get { return this.orderId; }
              set { this.orderId = value; }
          }
      
          public int OrderStatus
          {
              get { return this.orderStatus; }
              set { this.OrderStatus = value; }
          }
      
          public OrderStatusUpdate()
          {
              // Just empty here, this is for serialization
          }
      }
   2. Next we need a web method that will use this class. We simply want to send a status update in and deal with it. No output is required here. So, add the following web method to your web service:
      [WebMethod]
      public void UpdateOrderStatus(OrderStatusUpdate statusUpdate)
      {
          EventLog.WriteEntry(
              String.Format(
                  "Order [{0}] status set to '{1}'",
                  statusUpdate.OrderId,
                  statusUpdate.OrderStatus
                  )
              );
      }
      Note that I also added the following code to the service constructor for good measure:
      if (!EventLog.SourceExists("MyWebService"))
      {
          EventLog.CreateEventSource("MyWebService", "Application");
      }

Problems Found

POST /WebService/Service.asmx HTTP/1.1
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://tempuri.org/UpdateOrderStatus"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <UpdateOrderStatus xmlns="http://tempuri.org/">
      <OrderId>guid</OrderId>
      <NewStatus>OrderAccepted or OrderDeclined</NewStatus>
    </UpdateOrderStatus2>
  </soap:Body>
</soap:Envelope>