I keep getting WCF service is in faulted state on the client side. How should I catch WCF exceptions, without breaking my WCF service?

Question

I have a WCF service multiple UIs consume. When the user is unable to access the database, I get Unauthorised exception from the DB. I don\'t catch the exception on the server

Answer 1

You can use this code to create a wrapper class that will properly handle WCF exceptions:

public class ServiceProxyHelper : IDisposable
    where TProxy : ClientBase, new()
    where TChannel : class
{
    ///
    /// Private instance of the WCF service proxy.
    ///
    private TProxy _proxy;

    ///
    /// Gets the WCF service proxy wrapped by this instance.
    ///
    public TProxy Proxy
    {
        get
        {
            if (_proxy != null)
            {
                return _proxy;
            }
            else
            {
                throw new ObjectDisposedException("ServiceProxyHelper");
            }
        }
    }

    public TChannel Channel { get; private set; }

    ///
    /// Constructs an instance.
    ///
    public ServiceProxyHelper()
    {
        _proxy = new TProxy();
    }

    ///
    /// Disposes of this instance.
    ///
    public void Dispose()
    {
        try
        {
            if (_proxy != null)
            {
                if (_proxy.State != CommunicationState.Faulted)
                {
                    _proxy.Close();
                }
                else
                {
                    _proxy.Abort();
                }
            }
        }
        catch (CommunicationException)
        {
            _proxy.Abort();
        }
        catch (TimeoutException)
        {
            _proxy.Abort();
        }
        catch (Exception)
        {
            _proxy.Abort();
            throw;
        }
        finally
        {
            _proxy = null;
        }
    }
}

You can then call a service like this:

using (ServiceProxyHelper svc =
   new ServiceProxyHelper())
{
   svc.Proxy.SendMail(fromAddress, fromName, toEmail, toName, message);
}