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POmexTcpBinding in WCF - IMetadataExchange errors
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  1. POmexTcpBinding in WCF - IMetadataExchange errors
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    copied!<p>I'm wanting to get a WCF-over-TCP service working. I was having some problems with modifying my own project, so I thought I'd start with the "base" WCF template included in VS2008.</p> <p>Here is the initial WCF App.config and when I run the service the WCF Test Client can work with it fine:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;configuration&gt; &lt;system.web&gt; &lt;compilation debug="true" /&gt; &lt;/system.web&gt; &lt;system.serviceModel&gt; &lt;services&gt; &lt;service name="WcfTcpTest.Service1" behaviorConfiguration="WcfTcpTest.Service1Behavior"&gt; &lt;host&gt; &lt;baseAddresses&gt; &lt;add baseAddress="http://localhost:8731/Design_Time_Addresses/WcfTcpTest/Service1/" /&gt; &lt;/baseAddresses&gt; &lt;/host&gt; &lt;endpoint address="" binding="wsHttpBinding" contract="WcfTcpTest.IService1"&gt; &lt;identity&gt; &lt;dns value="localhost"/&gt; &lt;/identity&gt; &lt;/endpoint&gt; &lt;endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/&gt; &lt;/service&gt; &lt;/services&gt; &lt;behaviors&gt; &lt;serviceBehaviors&gt; &lt;behavior name="WcfTcpTest.Service1Behavior"&gt; &lt;serviceMetadata httpGetEnabled="True"/&gt; &lt;serviceDebug includeExceptionDetailInFaults="True" /&gt; &lt;/behavior&gt; &lt;/serviceBehaviors&gt; &lt;/behaviors&gt; &lt;/system.serviceModel&gt; &lt;/configuration&gt; </code></pre> <p>This works perfectly, no issues at all.</p> <p>I figured changing it from HTTP to TCP would be trivial: change the bindings to their TCP equivalents and remove the httpGetEnabled serviceMetadata element:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;configuration&gt; &lt;system.web&gt; &lt;compilation debug="true" /&gt; &lt;/system.web&gt; &lt;system.serviceModel&gt; &lt;services&gt; &lt;service name="WcfTcpTest.Service1" behaviorConfiguration="WcfTcpTest.Service1Behavior"&gt; &lt;host&gt; &lt;baseAddresses&gt; &lt;add baseAddress="net.tcp://localhost:1337/Service1/" /&gt; &lt;/baseAddresses&gt; &lt;/host&gt; &lt;endpoint address="" binding="netTcpBinding" contract="WcfTcpTest.IService1"&gt; &lt;identity&gt; &lt;dns value="localhost"/&gt; &lt;/identity&gt; &lt;/endpoint&gt; &lt;endpoint address="mex" binding="mexTcpBinding" contract="IMetadataExchange"/&gt; &lt;/service&gt; &lt;/services&gt; &lt;behaviors&gt; &lt;serviceBehaviors&gt; &lt;behavior name="WcfTcpTest.Service1Behavior"&gt; &lt;serviceDebug includeExceptionDetailInFaults="True" /&gt; &lt;/behavior&gt; &lt;/serviceBehaviors&gt; &lt;/behaviors&gt; &lt;/system.serviceModel&gt; &lt;/configuration&gt; </code></pre> <p>But when I run this I get this error in the WCF Service Host:</p> <p>System.InvalidOperationException: The contract name 'IMetadataExchange' could not be found in the list of contracts implemented by the service Service1. Add a ServiceMetadataBehavior to the configuration file or to the ServiceHost directly to enable support for this contract.</p> <p>I get the feeling that you can't send metadata using TCP, but that's the case why is there a mexTcpBinding option?</p>
 

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