Error trying to create json web service in asp.net

Question

I followed this to create a json web service in asp.net 3.5:

Creating JSON-enabled WCF services in .NET 3.5 (archive.org)

(Was at: http://www.pluralsight.com/community/blogs/fritz/archive/2008/01/31/50121.aspx )

It works fine if I want to use it internally, but since I want to connect to it externally, I got an error: "Publishing metadata for this service is currently disabled."

So, I tried to enable it, but now I get the error: "It is not possible to add the extension of the" serviceMetadata "behavior to the behavior of the endpoint" MyServiceAspNetAjaxBehavior "because the main type of behavior does not implement the IEndpointBehavior interface."

I know that I am doing something wrong in web.config, just can not understand what I'm doing wrong? Thanks!

This is in the web.config file:

<system.serviceModel> <behaviors> <endpointBehaviors> <behavior name="MyServiceAspNetAjaxBehavior"> <enableWebScript /> <serviceMetadata httpGetEnabled="true" /> </behavior> </endpointBehaviors> </behaviors> //Needed to add this to be able to use the web service on my shared host <serviceHostingEnvironment aspNetCompatibilityEnabled="true"> <baseAddressPrefixFilters> <add prefix="http://www.domain.com"/> </baseAddressPrefixFilters> </serviceHostingEnvironment> <services> <service name="MyService"> <endpoint address="" behaviorConfiguration="MyServiceAspNetAjaxBehavior" binding="webHttpBinding" contract="MyService" /> <endpoint contract="MyService" binding="mexHttpBinding" address="mex" /> </service> </services> 

In MyService.cs:

 using System; using System.Linq; using System.Runtime.Serialization; using System.ServiceModel; using System.ServiceModel.Activation; using System.ServiceModel.Web; [ServiceContract(Namespace = "")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class MyService { [OperationContract] public string GetForecast(string str) { return "Hello World"; } } 

In MyService.svc

 <%@ ServiceHost Language="C#" Debug="true" Service="MyService" CodeBehind="~/App_Code/MyService.cs" %> 

Answer 1

The MEX endpoint (one for metadata exchange) must have a specific IMetadataExchange system contract (which you made a IMetadataExchange in your configuration):

 <services> <service name="MyService"> <endpoint address="" behaviorConfiguration="MyServiceAspNetAjaxBehavior" binding="webHttpBinding" contract="MyService" /> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> </services> 

With this contract you can see your metadata.

A word of warning though: RESTful services generally do not provide any metadata such as WSDL or XSD - which is the concept of SOAP really.

Mark