wcf IsOneWay

Question

hi
I have a WCF service that has a fire and forget function, like this:
[OperationContract(IsOneWay = true)]
[WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]
void ActivateFsnCommands(string token, bool activate);
I would like to know if i can remove IsOneWay and still be backward compatible with existing clients?
I want to be able handle exceptions thrown from this method.

Answer 1

Hi @Jakob Aagesen , When the IsOneWay=true property is applied to the operation contract, it means the client returns as soon as an outbound message is queued for dispatch to the service; no response message is generated or sent. If you remove this property, I suggest you update the client to recall the service to avoid problems, because the server has been updated and will affect the call of the client. For details, please refer to OperationContractAttribute.IsOneWay Property. Processing the exception thrown in the method can refer to Handling Exceptions and Faults.

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Best regards,
Theobald Du