[WCF Step by Step 读书笔记] Chapter02 寄宿一个WCF服务

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.ServiceModel;
using Products;

namespace ProductsServiceHost
{
/// <summary>
/// Interaction logic for HostController.xaml
/// </summary>
public partial class HostController : Window
{
private ServiceHost productsServiceHost;

public HostController()
{
InitializeComponent();
}

private void handleException(Exception ex)
{
MessageBox.Show(ex.Message, "Exception",
MessageBoxButton.OK, MessageBoxImage.Error);
}

private void start_Click(object sender, RoutedEventArgs e)
{
try
{
productsServiceHost = new ServiceHost(typeof(ProductsServiceImpl));
productsServiceHost.Open();
stop.IsEnabled = true;
start.IsEnabled = false;
status.Text = "Service Running";
}
catch (Exception ex)
{
handleException(ex);
}
}

private void stop_Click(object sender, EventArgs e)
{
try
{
productsServiceHost.Close();
stop.IsEnabled = false;
start.IsEnabled = true;
status.Text = "Service Stopped";
}
catch (Exception ex)
{
handleException(ex);
}
}
}
}

这里工作的原理是：在类内部有一个ServiceHost类型的member，每次揿开始按钮，会为其实例化一个ServiceHost，而揿关闭按钮时会执行Close方法。

注意这里实例化的时候传入的参数是typeof(ProductsServiceImpl)，这里typeof将返回一个Type类型的对象，这样ServiceHost的构造函数就可以利用它获得ProductsServiceImpl的各种member和method，具体可参考：

http://msdn.microsoft.com/zh-cn/library/58918ffs(v=vs.80).aspx

1）在ProductsServiceHost这个project里的App.config，通过configuration wizard进行配置的时候，首先在Services=>Host这个节点下添加BaseAddress为net.tcp://localhost:8080/TcpService

2）在Endpoints里添加一个发布给Service的Endpoint，其Binding为mexTcpBinding，发布用的Contract是ProductsServices.IProductService。这里地址栏使用空白，表明其Service的发布地址继承为net.tcp://localhost:8080/TcpService

3）在Endpoints里添加一个所提供的Service的Metadata的Endpoint，Binding为mexTcpBinding，发布用的Contract是IMetadataExchange，地址狼为Mex，表明其Service发布的地址为net.tcp://localhost:8080/TcpService