Error: Cannot process the message because the content type 'application/json; charset=utf-8 was not the expected type

Question

I am trying to invoke WCF service using jQuery and getting this error: ``` "Cannot process the message because the content type 'application/json; charset=utf-8' was not the expected type 'multipart/related; type="application/xop+xml"'." ``` This is how my WCF service looks like: Interface: ``` public interface IService { [OperationContract] [WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json)] PhotoServiceResponse GetPhoto(); } [DataContract] public class PhotoServiceResponse { [MessageBodyMember] public Byte[] Photo { get; set; } } ``` Implementation: ``` [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class Service : IService { #region IService Members public PhotoServiceResponse GetPhoto() { PhotoServiceResponse response = new PhotoServiceResponse(); response.Photo = File.ReadAllBytes(@"C:\Temp\SomePic.bmp"); return response; } #endregion } ``` Config: ```

Accepted Answer

I think you are facing some exception because you are doing some mistakes in binding and others.

For REST communication in WCF, you should use the `webHttpBinding` and not `wsHttpBinding`. Second you should mark the `Photo` property with `DataMember`.

```
  [DataContract]
  public class PhotoServiceResponse
  {
    [DataMember]
    public Byte[] Photo { get; set; }
  }
```

And you have to use the `System.ServiceModel.Activation.WebServiceHostFactory` in the svc file.

Ex.

```
<%@ ServiceHost Service="Service1" 
Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>
```

Once you fixed this issues at-least you see some response in the client side and if the service is running in different domain make sure you have done enough settings in the service side for cross site communication.

Error: Cannot process the message because the content type 'application/json; charset=utf-8 was not the expected type

Solution

Problem

Related problems