如何在 ChannelFactory<TChannel>.Faulted 中获取故障详细信息

Question

我正在为 WCF ChannelFactory 管理器编写一些代码。我的问题来自事件“ChannelFactory.Faulted”：两个参数（“object sender”和“EventArgs args”）都不包含有关原始 fualt 的信息，如何在自定义故障处理程序中获取 ChannelFactory 故障详细信息？

   private ChannelFactory CreateFactoryInstance<T>(string endpointConfigurationName, string endpointAddress)
    {
        ChannelFactory factory = null;
        factory = new ChannelFactory<T>(endpointConfigurationName, new EndpointAddress(endpointAddress));
        //Customizing Factory Fault handler
        factory.Faulted += FactoryFaulted;
        factory.Open();
        return factory;
    }

    private void FactoryFaulted(object sender, EventArgs args)
    {
        ChannelFactory factory = (ChannelFactory)sender;            
        factory.Close();
        //...
        //How can I get more Fault detail, so as to throw a meaningful Exception?
        throw new ApplicationException("Failure in ChannelFactory ");
    }

感谢您的关注。

Answer 1

我对 ILSpy 进行了简短的查看，ChannelFactory 派生自 CommunicationObject，当在 Open/BeginOpen 期间抛出异常时，它可以转换为故障状态。所以 try/catch around Open 将至少捕获一些可能的错误。不确定是否还有其他地方可以使通道工厂进入故障状态。请注意，Faulted 事件处理程序是在 finally 块中调用的，这意味着它会在您捕获异常之前被调用。