Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.

Question

Hi All,
        I am getting this error.Please provide solution for this.
Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.

I am using one console app which communicates with windows application via http,wsDualHttp,tcp and named pipe.
I am getting above error.

My App.config file is 

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

<system.serviceModel>

<services>

<service name="Bartech.Library.BartechService.clsBartechServer">

<endpoint address = "net.tcp://localhost:811/EfridgeService"

binding="netTcpBinding" bindingConfiguration="bindCmdHandler"

contract="Bartech.Library.BartechService.IBSSContract" />

<endpoint address = "net.tcp://localhost:810/BartechService"

binding="netTcpBinding" bindingConfiguration="bindCmdHandler"

contract="Bartech.Library.BartechService.IBartechServer" />

<endpoint address = "net.tcp://localhost:813/CommunicationViewService"

binding="netTcpBinding" bindingConfiguration="bindCmdHandler"

contract="Bartech.Library.BartechService.IBSSCommunicationViewContract" />

<endpoint address = "net.tcp://localhost:812/BartechService"

binding="netTcpBinding" bindingConfiguration="bindCmdHandler"

contract="Bartech.Library.BartechService.IBPMSContract" />

<endpoint address = "http://localhost:811/EfridgeService"

binding="basicHttpBinding"

contract="Bartech.Library.BartechService.IBSSContract" />

<endpoint address = "http://localhost:810/BartechService"

binding="basicHttpBinding"

contract="Bartech.Library.BartechService.IBartechServer" />

<endpoint address = "http://localhost:813/CommunicationViewService"

binding="basicHttpBinding"

contract="Bartech.Library.BartechService.IBSSCommunicationViewContract"/>

<endpoint address = "http://localhost:812/BPMSService"

binding="basicHttpBinding"

contract="Bartech.Library.BartechService.IBPMSContract"/>

<endpoint address = "net.pipe://localhost/EfridgeService"

binding="netNamedPipeBinding" bindingConfiguration="bindNetNamedPipeBinding"

contract="Bartech.Library.BartechService.IBSSContract" />

<endpoint address = "net.pipe://localhost/BartechService"

binding="netNamedPipeBinding" bindingConfiguration="bindNetNamedPipeBinding"

contract="Bartech.Library.BartechService.IBartechServer" />

<endpoint address = "net.pipe://localhost/CommunicationViewService"

binding="netNamedPipeBinding" bindingConfiguration="bindNetNamedPipeBinding"

contract="Bartech.Library.BartechService.IBSSCommunicationViewContract" />

<endpoint address = "net.pipe://localhost/BPMSService"

binding="netNamedPipeBinding" bindingConfiguration="bindNetNamedPipeBinding"

contract="Bartech.Library.BartechService.IBPMSContract" />

<host>

<timeouts openTimeout="00:30:00" closeTimeout="00:30:00"/>

</host>

</service>

</services>

<behaviors>

<serviceBehaviors>

<behavior name="BssBehavior">

<serviceThrottling maxConcurrentCalls="4000" maxConcurrentInstances="4000" maxConcurrentSessions="4000"/>

<dataContractSerializer maxItemsInObjectGraph="2147483647"/>

</behavior>

</serviceBehaviors>

</behaviors>

<bindings>

<netTcpBinding>

<binding name="bindCmdHandler"

closeTimeout="00:30:00"

openTimeout="00:30:00"

receiveTimeout="00:30:00"

sendTimeout="00:30:00"

transferMode="Buffered"

maxBufferPoolSize="2147483647"

maxBufferSize="2147483647"

maxConnections="100"

maxReceivedMessageSize="2147483647">

<readerQuotas maxDepth="2147483647"

maxStringContentLength="2147483647"

maxArrayLength="2147483647"

maxBytesPerRead="2147483647"

maxNameTableCharCount="2147483647" />

</binding>

</netTcpBinding>

<wsDualHttpBinding>

<binding name="bindWSDualHttpBinding"

closeTimeout="00:30:00"

openTimeout="00:30:00"

receiveTimeout="00:30:00"

sendTimeout="00:30:00"

maxBufferPoolSize="2147483647"

maxReceivedMessageSize="2147483647">

<readerQuotas maxDepth="2147483647"

maxStringContentLength="2147483647"

maxArrayLength="2147483647"

maxBytesPerRead="2147483647"

maxNameTableCharCount="2147483647" />

</binding>

</wsDualHttpBinding>

<basicHttpBinding>

<binding name="bindBasicHttpBinding"

closeTimeout="00:30:00"

openTimeout="00:30:00"

receiveTimeout="00:30:00"

sendTimeout="00:30:00"

transferMode="Buffered"

maxBufferPoolSize="2147483647"

maxBufferSize="2147483647"

maxReceivedMessageSize="2147483647">

<readerQuotas maxDepth="2147483647"

maxStringContentLength="2147483647"

maxArrayLength="2147483647"

maxBytesPerRead="2147483647"

maxNameTableCharCount="2147483647" />

</binding>

</basicHttpBinding>

<netNamedPipeBinding>

<binding name="bindNetNamedPipeBinding"

closeTimeout="00:30:00"

openTimeout="00:30:00"

receiveTimeout="00:30:00"

sendTimeout="00:30:00"

transferMode="Buffered"

maxBufferPoolSize="2147483647"

maxBufferSize="2147483647"

maxConnections="100"

maxReceivedMessageSize="2147483647">

<readerQuotas maxDepth="2147483647"

maxStringContentLength="2147483647"

maxArrayLength="2147483647"

maxBytesPerRead="2147483647"

maxNameTableCharCount="2147483647" />

</binding>

</netNamedPipeBinding>

</bindings>

</system.serviceModel>

I am unable to open service I am getting following error.

Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.

I am using following settings in interface contract

[ServiceContract(SessionMode = SessionMode.Allowed, CallbackContract = typeof(IBSSEvents))]

public interface IBSSContract

{
}

---

Suyog

Answer 1

BasicHttpBinding doesn't support duplex message exchange pattern, please use WSDualHttpBinding instead.

Thanks

---

Another Paradigm Shift
http://shevaspace.blogspot.com