VisualStudio代码调试输出跟踪

class EFIntercepterLogging : DbCommandInterceptor

    {

        private readonly Stopwatch _stopwatch = new Stopwatch();

        public override void ScalarExecuting(System.Data.Common.DbCommand command, DbCommandInterceptionContext<object> interceptionContext)

        {

            base.ScalarExecuting(command, interceptionContext);

            _stopwatch.Restart();

        }

        public override void ScalarExecuted(System.Data.Common.DbCommand command, DbCommandInterceptionContext<object> interceptionContext)

        {

            _stopwatch.Stop();

            if (interceptionContext.Exception != null)

            {

                 Trace.TraceError ("Exception:{1} \r\n --> Error executing command: {0}", command.CommandText, interceptionContext.Exception.ToString());

            }

            else

            {

                Trace.TraceInformation("\r\n执行时间:{0} 毫秒\r\n-->ScalarExecuted.Command:{1}\r\n", _stopwatch.ElapsedMilliseconds, command.CommandText);

            }

            base.ScalarExecuted(command, interceptionContext);

        }

}