CODEWITHSUNDEEP
c#.netwcftcpport
ispiro
ispiro

Reputation: 27633

Get port number from ServiceHost

I'm creating a WCF ServiceHost with port 0 in order to get a dynamically assigned port:

ServiceHost host = new ServiceHost(typeof(MyClass), new Uri("net.tcp://localhost:0/abc"));
host.AddServiceEndpoint(typeof(MyInterface), new NetTcpBinding(SecurityMode.None), "net.tcp://localhost:0/abc");

How do I get the port number assigned?

I tried:

host.ChannelDispatchers[0].Listener.Uri.Port

but it just returns 0 which is presumably wrong.

Upvotes: 1

Views: 1913

Answers (1)

wbennett
wbennett

Reputation: 2563

Alright, I think I figured it out. You need to make sure the listen URI behavior is set to unique and also open it. By default it is set to explicit.

I made a bogus service class that contained the following service contract:

[ServiceContract]
public class MyClass
{
   [OperationContract]
   public string Test()
   {
      return "test";
   }
}

And added the corresponding test class:

[TestClass]
public class TestMyClass
{
    [TestMethod]
    public string TestPortIsNotZero(){
        var host = new ServiceHost(typeof(MyClass), 
            new Uri("net.tcp://localhost:0/abc"));
        var endpoint = host.AddServiceEndpoint(typeof(MyClass), 
            new NetTcpBinding(SecurityMode.None), "net.tcp://localhost:0/abc");
        //had to set the listen uri behavior to unique
        endpoint.ListenUriMode = ListenUriMode.Unique;
        //in addition open the host
        host.Open();

        foreach (var cd in host.ChannelDispatchers)
        {
           //prints out the port number in the dynamic range
           Debug.WriteLine(cd.Listener.Uri.Port);
           Assert.IsTrue(cd.Listener.Uri.Port >= 0); 
        }
   }
}

Upvotes: 5

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