ServiceEndpoint具有一个可读可写的ListenUri属性，该属性表示服务端终结点的物理监听地址，该地址默认和终结点逻辑地址一致(即ServiceEndpoint的Uri)。对于客户端来说，请求真正发送的目标地址是服务的监听地址，默认情况下终结点的逻辑地址和监听地址是一样的。监听地址可以通过ServiceHost的AddServiceEndpoint指定。
public ServiceEndpoint AddServiceEndpoint(Type implementedContract, Binding binding, string address);
public ServiceEndpoint AddServiceEndpoint(Type implementedContract, Binding binding, Uri address);
public ServiceEndpoint AddServiceEndpoint(Type implementedContract, Binding binding, string address, Uri listenUri);
public ServiceEndpoint AddServiceEndpoint(Type implementedContract, Binding binding, Uri address, Uri listenUri);
在实际的运行中，ServiceEndpoint的最终监听地址还要由ListenUriMode一起控制。ListenUriModel定义如下：
public enum ListenUriMode
{
Explicit = ,
Unique = ,
}
Explicit表示终结点的监听地址严格采用ListenUri指定设置的Uri，Unique会根据终结点采用的策略确定最终使用的监听地址。
在采用Unique的情况下，监听器地址的生成策略如下：
1.采用Tcp协议并且不采用端口共享，会选择一个未使用的端口作为保证监听地址的唯一性。
2.采用Tcp协议并且采用端口共享，会在原有的监听地址后面加一个Guid以保证监听地址的唯一性。
3.采用非Tcp协议，会在原有的监听地址后面加一个Guid以保证监听地址的唯一性。
下面代码演示服务端是如何确定终结点的监听地址，监听地址在信道分发器(ChannelDispatcher)中体现，
using System.ServiceModel;
using System.ServiceModel.Description;
using System.ServiceModel.Channels;
namespace host
{
class Program
{
static void Main(string[] args)
{
using (ServiceHost host = new ServiceHost(typeof(mywcf.Calculator)))
{
ServiceEndpoint endpoint1 = host.AddServiceEndpoint(typeof(mywcf.ICalculator), new WSHttpBinding(), "http://localhost:1111"); ServiceEndpoint endpoint2 = host.AddServiceEndpoint(typeof(mywcf.ICalculator), new WSHttpBinding(), "http://localhost:2222");
endpoint2.ListenUriMode = ListenUriMode.Unique; ServiceEndpoint endpoint3 = host.AddServiceEndpoint(typeof(mywcf.ICalculator), new NetTcpBinding(), "net.tcp://localhost:3333");
endpoint3.ListenUriMode = ListenUriMode.Unique; NetTcpBinding tcpbind = new NetTcpBinding();
tcpbind.PortSharingEnabled = true;
ServiceEndpoint endpoint4 = host.AddServiceEndpoint(typeof(mywcf.ICalculator), tcpbind, "net.tcp://localhost:4444");
endpoint4.ListenUriMode = ListenUriMode.Unique; ServiceEndpoint endpoint5 = host.AddServiceEndpoint(typeof(mywcf.ICalculator), new NetTcpBinding(), "net.tcp://localhost:5555");
host.Opened += delegate { Console.WriteLine("Service Start!"); };
host.Open(); foreach (var dispatch in host.ChannelDispatchers)
{
Console.WriteLine(dispatch.Listener.Uri);
}
}
}
}
}
输出：
endpoint1的监听地址采用默认值，与逻辑地址一致。endpoint2使用了Unique模式，并且是非tcp协议类型，在默认的前提下添加一个GUID。endpoint3使用了Unique模式，并且是tcp协议类型，运行是分配了一个没有被使用的端口。endpoint4采用了端口共享模式，并且是tcp协议类型，监听地址加一个GUID。endpoint5监听地址默认与逻辑地址一致。
示例代码也可以用配置文件方式演示，配置文件如下：
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.serviceModel>
<bindings>
<netTcpBinding>
<binding portSharingEnabled="True" name="tcpbind"></binding>
</netTcpBinding>
</bindings>
<services>
<service name="mywcf.Calculator">
<endpoint contract="mywcf.ICalculator" binding="wsHttpBinding" address="http://localhost:1111"></endpoint>
<endpoint contract="mywcf.ICalculator" binding="wsHttpBinding" address="http://localhost:2222" listenUriMode="Unique"></endpoint>
<endpoint contract="mywcf.ICalculator" binding="netTcpBinding" address="net.tcp://localhost:3333" ></endpoint>
<endpoint contract="mywcf.ICalculator" binding="netTcpBinding" address="net.tcp://localhost:4444" listenUriMode="Unique"></endpoint>
<endpoint contract="mywcf.ICalculator" binding="netTcpBinding" bindingConfiguration="tcpbind" address="net.tcp://localhost:5555" listenUriMode="Unique" ></endpoint>
</service>
</services>
</system.serviceModel>
</configuration>
采用了配置文件后服务端代码就很简单了,如下：
using System.ServiceModel;
namespace hostxml
{
class Program
{
static void Main(string[] args)
{
using (ServiceHost host = new ServiceHost(typeof(mywcf.Calculator)))
{
host.Opened += delegate { Console.WriteLine("Service Start!"); };
host.Open();
foreach (var dispatch in host.ChannelDispatchers)
{
Console.WriteLine(dispatch.Listener.Uri);
}
}
}
}
}