WCF NetTcpBinding - from Microsoft tutorial - getting timeout

Question

Hello,

I built a project as descripted in this URL:

http://msdn.microsoft.com/en-us/library/ms734784.aspx

I used the app.config version. But using the code-Version does not change anything (the timeout-error still occurs).

To create the ServiceHost I used the following code:

this.serviceHost = new ServiceHost(typeof(Calculator));
// Open the ServiceHostBase to create listeners and start 
// listening for messages.
this.serviceHost.Open();

On the client side I used the following code:

ChannelFactory<ICalculator> factory = new ChannelFactory<ICalculator>("netTcp_ICalculator");
ICalculator communicationChannel = this.factory.CreateChannel();
string test = communicationChannel.GetData(5);

On the last line the program waits one minute, then I get a timeout:

This request operation sent to net.tcp://localhost:8008/Calculator did not
receive a reply within the configured timeout (00:01:00).
The time allotted to this operation may have been a portion
of a longer timeout. This may be because the service is still
processing the operation or because the service was unable to
send a reply message. Please consider increasing the operation
timeout (by casting the channel/proxy to IContextChannel and
setting the OperationTimeout property) and ensure that the service
is able to connect to the client.

The class Calculator and the interface exist. Besides this timeout I get no other error. I set a breakpoint at the GetData method, but the breakpoint was not hit.

I have tried to change the portnumber used for the client from 8008 to 8009, but let the endpoint for the server at 8008. I wanted to test if the client tries to reach the server. Then I get the error that the other side is not answering (EndpointNotFoundException).

When changing the client port back to 8008 I get the Timeout error again.

Is there anything wrong with my code? How can I ensure that the server can reach the client? Client and server are in the same test application.

Thank you for your help!

EDIT:

I have now deleted the app.config settings. And tried to build the server and client by using the sourcecode. To build the server was no problem. But building the client is a problem.

There is no way to call:

CalculatorClient cc = new CalculatorClient(myBinding, myEndpointAddress);

The compiler does not know CalculatorClient.

Can I use the following instead?

NetTcpBinding myBinding = new NetTcpBinding();
myBinding.Security.Mode = SecurityMode.None;

// Create the address string, or get it from configuration.
string tcpUri = "net.tcp://localhost:8008/Calculator";

// Create an endpoint address with the address.
EndpointAddress myEndpointAddress = new EndpointAddress(tcpUri);
ChannelFactory<ICalculator> factory = new ChannelFactory<ICalculator>(myBinding, myEndpointAddress);
factory.Open();
ICalculator communicationChannel = this.factory.CreateChannel();
string test = communicationChannel.GetData(5);

I get again an exception at the last line :(

SOLVED:

Ok, the problem is solved. I needed to call the WCF host initialization via an own thread:

hostThread = new Thread(this.createService);
hostThread.Start();

Now everything works fine!

Thanks for all your help!

Answer 1

You are not adding any endpoints to the service. You did not include the part of the example code that adds the service endpoint:

Uri tcpUri = new Uri("net.tcp://localhost:8008/Calculator");
// Create the ServiceHost.
ServiceHost sh = new ServiceHost(typeof(Calculator), tcpUri);

// Create a binding that uses TCP and set the security mode to none.
NetTcpBinding b = new NetTcpBinding();
b.Security.Mode = SecurityMode.None;

// Add an endpoint to the service.
sh.AddServiceEndpoint(typeof(ICalculator), b, "");
// Open the service and wait for calls.
sh.Open();

Edit: Same goes for your client. You have to specify an endpoint addresses

  // Create a channel factory.
  NetTcpBinding b = new NetTcpBinding();
  b.Security.Mode = SecurityMode.None;
  Uri tcpUri = new Uri("net.tcp://localhost:8008/Calculator");

  ChannelFactory<ICalculator> myChannelFactory = new ChannelFactory<ICalculator>(b,new EndpointAddress(tcpUri));

  // Create a channel.
  ICalculator calculator = myChannelFactory.CreateChannel();

Edit2: I can't currently test this code... Will give it a try tomorrow morning.

Answer 2

Are you using Windows 7?

If so, you likely need to run Visual Studio as an Administrator. UAC will not let you create the service endpoint unless you are a running as an administrator.