分享个代码，多个StreamWriter同步写入

WM_JAWIN 2014-07-28 05:23:48

利用反射实现，同步将多内容输出到多个TextWriter中
代码：

        private void MultiCall(params object[] ptrs)

        {

            if (this.Writers.Count == 0)

                return;

            var st = new StackTrace();

            var s = st.GetFrame(1);

            var m = s.GetMethod();



            var methodName = m.Name;

            var twInfo = typeof(TextWriter);



            if (ptrs == null || ptrs.Length == 0)

                m = twInfo.GetMethod(methodName, new Type[] { });

            else

            {

                Type[] types = new Type[ptrs.Length];

                for (var i = 0; i < ptrs.Length; i++)

                {

                    types[i] = ptrs[i].GetType();

                }

                m = twInfo.GetMethod(methodName, types);

            }



            foreach (var w in this.Writers)

            {

                m.Invoke(w, ptrs);

            }



        }

通过StackTrace()取得调用被调用方法，然后反射出TextWriter上对应的方法，然后调用就搞定了。
重写StreamWriter中几个相关方法，即可完在同步输出

#region override TextWriter

        public override void Write(char[] buffer)

        {

            base.Write(buffer);

            MultiCall(buffer);

        }

        public override void Write(char value)

        {

            base.Write(value);

            MultiCall(value);

        }



        public override void Write(string value)

        {

            base.Write(value);

            MultiCall(value);

        }



        public override void Write(char[] buffer, int index, int count)

        {

            base.Write(buffer, index, count);

            MultiCall(buffer, index, count);

        }

        #endregion

小试一下：

using (log = new StreamWriter(AppDomain.CurrentDomain.BaseDirectory + "log.txt", false))

            {

                var con = Console.OpenStandardOutput();

                var smw = new StreamMultiWriter(con,Console.OutputEncoding);

                smw.AutoFlush = true;

                smw.Writers.Add(log);

                Console.SetOut(smw);



                Console.WriteLine("Console日志同步输入测试");

                Console.WriteLine("当前时间:{0}", DateTime.Now);

                Console.WriteLine();

               

                smw.Writers.Remove(log);

            }