WCF global exception handling

Question

i have build a global exception handling for my wcf application. I have a class that implements 'IErrorHandler' and handles the exception. I can register the ErrorHandler with a 'IServiceBehavior' attribute. (So i don't need to touch every function)

I use the class 'FaultException' to wrap my exception object.

Dim sysEx As SystemException = 'Do Convert
Dim fex As New FaultException(Of SystemException)(sysEx, sysEx.Message)
Dim faultMessage As MessageFault = fex.CreateMessageFault
fault = System.ServiceModel.Channels.Message.CreateMessage(version, faultMessage, fex.Action)

Now I can retrieve the error message at client side. But unfortunally I can't retrieve the original exception type or the original stacktrace.

Is there an easy option to solve the problem without adding 'FaultContract' to each function in my service?

Thank you

Sixto Saez Sixto Saez · Accepted Answer · 2011-07-12T15:04:30

Steve & Saravanan are both correct. Here is how to create a custom fault type & how to use it:

Custom fault contract:

[DataContract]
public class UncaughtErrorFault
{
    [DataMember]
    public string ExecptionType { get; set; }

    [DataMember]
    public string Message { get; set; }

    [DataMember]
    public string StackTrace { get; set; }
}

IErrorHandler method override:

public void ProvideFault(Exception error,
                         MessageVersion version,
                         ref Message fault)
{
    var fe = new FaultException<UncaughtErrorFault>(
        new UncaughtErrorFault
            {
                ExecptionType = error.GetType().Name,
                Message = error.Message,
                StackTrace = error.StackTrace
            },
        error.Message,
        FaultCode.CreateReceiverFaultCode(
            new FaultCode(error.GetType().Name)));

    var mf = fe.CreateMessageFault();

    fault = Message.CreateMessage(version, mf, fe.Action);
}

WCF global exception handling

3 Answers