以下是我的WCF服务配置。
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
<system.serviceModel>
<bindings />
<services>
<service behaviorConfiguration="DominionServer.ServerBehavior"
name="DominionServer.DominionServer">
<endpoint address="" binding="wsDualHttpBinding" bindingConfiguration=""
contract="DominionServer.IDominionServer" />
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="DominionServer.ServerBehavior">
<serviceMetadata httpGetEnabled="True"/>
<serviceDebug includeExceptionDetailInFaults="False" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>
这是服务合同：
[ServiceContract(CallbackContract = typeof(INotification))]
public interface IDominionServer
{
void Foo();
void bar();
}
当我尝试创建服务的服务引用时，我被告知合同需要双面绑定。出于某种原因，它忽略了我指定的wsDualHttpBinding。谁能发现发生了什么？
编辑：@CodeCaster
There was an error downloading 'http://localhost:60241/IDominionServer.svc'.
The request failed with the error message:
--
<html>
<head>
<title>Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.</title>
</head>
<body bgcolor="white">
<span><H1>Server Error in '/' Application.<hr width=100% size=1 color=silver></H1>
<h2> <i>Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.</i> </h2></span>
<font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">
<b> Description: </b>An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
<br><br>
<b> Exception Details: </b>System.InvalidOperationException: Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.<br><br>
<b>Source Error:</b> <br><br>
<table width=100% bgcolor="#ffffcc">
<tr>
<td>
<code>
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.</code>
</td>
</tr>
</table>
<br>
<b>Stack Trace:</b> <br><br>
<table width=100% bgcolor="#ffffcc">
<tr>
<td>
<code><pre>
[InvalidOperationException: Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.]
System.ServiceModel.Description.DispatcherBuilder.BuildChannelListener(StuffPerListenUriInfo stuff, ServiceHostBase serviceHost, Uri listenUri, ListenUriMode listenUriMode, Boolean supportContextSession, IChannelListener& result) +12336515
System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost) +1319
System.ServiceModel.ServiceHostBase.InitializeRuntime() +60
System.ServiceModel.ServiceHostBase.OnBeginOpen() +27
System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout) +50
System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) +318
System.ServiceModel.HostingManager.ActivateService(String normalizedVirtualPath) +206
System.ServiceModel.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) +651
[ServiceActivationException: The service '/IDominionServer.svc' cannot be activated due to an exception during compilation. The exception message is: Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it..]
System.Runtime.AsyncResult.End(IAsyncResult result) +688590
System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result) +190
System.ServiceModel.Activation.HostedHttpRequestAsyncResult.ExecuteSynchronous(HttpApplication context, String routeServiceVirtualPath, Boolean flowContext, Boolean ensureWFService) +234
System.ServiceModel.Activation.HttpModule.ProcessRequest(Object sender, EventArgs e) +359
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +148
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75
</pre></code>
</td>
</tr>
</table>
<br>
<hr width=100% size=1 color=silver>
<b>Version Information:</b> Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.237
</font>
</body>
</html>
<!--
[InvalidOperationException]: Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.
at System.ServiceModel.Description.DispatcherBuilder.BuildChannelListener(StuffPerListenUriInfo stuff, ServiceHostBase serviceHost, Uri listenUri, ListenUriMode listenUriMode, Boolean supportContextSession, IChannelListener& result)
at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost)
at System.ServiceModel.ServiceHostBase.InitializeRuntime()
at System.ServiceModel.ServiceHostBase.OnBeginOpen()
at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath)
at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)
[ServiceActivationException]: The service '/IDominionServer.svc' cannot be activated due to an exception during compilation. The exception message is: Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it..
at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result)
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.ExecuteSynchronous(HttpApplication context, String routeServiceVirtualPath, Boolean flowContext, Boolean ensureWFService)
at System.ServiceModel.Activation.HttpModule.ProcessRequest(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
-->
--.
Metadata contains a reference that cannot be resolved: 'http://localhost:60241/IDominionServer.svc'.
The server did not provide a meaningful reply; this might be caused by a contract mismatch, a premature session shutdown or an internal server error.
If the service is defined in the current solution, try building the solution and adding the service reference again.