asp.net中WebService 捕获全局异常

 public class SoapExceptionHandler : System.Web.Services.Protocols.SoapExtension
    {
        public override object GetInitializer(Type serviceType)
        {
            return null;
        }

        public override object GetInitializer(System.Web.Services.Protocols.LogicalMethodInfo methodInfo, System.Web.Services.Protocols.SoapExtensionAttribute attribute)
        {
            return null;
        }

        public override void Initialize(object initializer)
        {
           
        }

        public override void ProcessMessage(System.Web.Services.Protocols.SoapMessage message)
        {
            if (message.Stage == SoapMessageStage.AfterSerialize)
            {
                if (message.Exception != null)
                {
                    AppLog.Info(message.Exception.InnerException);
                    //LogUtil.Log.Error(message.Exception.InnerException);
                }
            }
        }
    }

 <soapExtensionTypes>
        <add type="Eway.HR.WebService.SoapExceptionHandler, Eway.HR.WebService" priority="1" group="High" />
      </soapExtensionTypes>