C# 4 and .NET 4

simple service and Client ❘ 1287
Custom service host
WCF allows services to run in any host. You can create a Windows Forms or Windows Presentation
Foundation (WPF) application for peer-to-peer services, or you can create a Windows service, or host the
service with Windows Activation Services (WAS). A console application is also good to demonstrate a
simple host.
With the service host, you must reference the library RoomReservationService. The service is started
by instantiating and opening an object of type ServiceHost. This class is defined in the namespace
System.ServiceModel. The RoomReservationService class that implements the service is defined in the
constructor. Invoking the Open() method starts the listener channel of the service — the service is ready to
listen for requests. The Close() method stops the channel.
using System;
using System.ServiceModel;
namespace Wrox.ProCSharp.WCF
{
class Program
{
internal static ServiceHost myServiceHost = null;
internal static void StartService()
{
myServiceHost = new ServiceHost(typeof(RoomReservationService));
myServiceHost.Open();
}
internal static void StopService()
{
if (myServiceHost.State != CommunicationState.Closed)
myServiceHost.Close();
}
static void Main()
{
StartService();
Console.WriteLine("Server is running. Press return to exit");
Console.ReadLine();
}
}
}
StopService();
code snippet RoomReservationServiceHost/Program.cs
For the WCF configuration, you need to copy the application configuration file that was created with
the service library to the host application. You can edit this configuration file with the WCF Service
Configuration Editor (see Figure 43-5).
Using the custom service host, you can deselect the WCF option to start the WCF Service Host in the project
settings of the WCF library.
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