'webHttp' is not registered in the collection at system.serviceModel/extensions/behaviorExtensions

Question

I am having a problem getting restful services going.  Here is my web.config section:

Code Block

<system.serviceModel>
        <behaviors>
            <serviceBehaviors>
                <behavior name="PVDServices.Service1Behavior">
                    <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
                    <serviceMetadata httpGetEnabled="true"/>
                    <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
                    <serviceDebug includeExceptionDetailInFaults="false"/>
                </behavior>
            </serviceBehaviors>
            <endpointBehaviors>
                <behavior name="restBehavior">
          <webHttp/>
                </behavior>
            </endpointBehaviors>
        </behaviors>
        <services>
            <service name="PVDServices.Services" behaviorConfiguration="PVDServices.Service1Behavior">
                <endpoint name="REST" binding="webHttpBinding"
                  bindingConfiguration=""
                  contract="PVDServices.IServices" behaviorConfiguration="restBehavior">
                </endpoint>
            </service>
        </services>
    </system.serviceModel>

Here is my defined interface:

Code Block

namespace PVDServices
{
    // NOTE: If you change the interface name "IService1" here, you must also update the reference to "IService1" in Web.config.
    [ServiceContract]
    public interface IServices
    {
        [OperationContract, WebGet]
        List<Video> GetVideos(int startIndex, int count);
    }

    [DataContract]
    public class Video
    {
        [DataMember]
        public string ImageUrl { get; set; }
        [DataMember]
        public string Title { get; set; }
    }
}

This is the message I am receiving:

Configuration Error

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Invalid element in configuration. The extension name 'webHttp' is not registered in the collection at system.serviceModel/extensions/behaviorExtensions.

Any ideas?

Answer 1

 

Can you make sure .NET3.5 is installed properly on your machine? The above error would occur only if .NET3.5 is not installed correctly.

Answer 2

1. Go to C:\WINDOWS\Microsoft.NET\Framework\v3.5
2. Run WFServicesReg.exe /c

Enjoy

Answer 3

Add these inside the settings:

 

<configuration>

<system.serviceModel>

<extensions>

<behaviorExtensions>

<add name="webHttp" type="System.ServiceModel.Configuration.WebHttpElement, System.ServiceModel.Web, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

</behaviorExtensions>

<bindingElementExtensions>

<add name="webMessageEncoding" type="System.ServiceModel.Configuration.WebMessageEncodingElement, System.ServiceModel.Web, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

</bindingElementExtensions>

</extensions>

...

 

</configuration>

Answer 4

1. Go to C:\WINDOWS\Microsoft.NET\Framework\v3.5
2. Run WFServicesReg.exe /c

Enjoy

I'm surpised that no one considering this as the answer. I have done all steps above, except this one and I can never get it to work until I tried this.

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aahkam