public class LogHelper

    {

        private static string logFolder = AppDomain.CurrentDomain.BaseDirectory + "errorlog";

        private static string logFile;

        /// <summary>

        /// 构造函数

        /// </summary>

        public LogHelper()

        {

            try

            {

                logFile = Path.Combine(logFolder, (DateTime.Now.Date.ToString("yyyy-MM-dd") + ".Log"));

                if (!Directory.Exists(logFolder))

                {

                    Directory.CreateDirectory(logFolder);

                }

                if (!File.Exists(logFile))

                {

                    //日志不存在创建

                    using (StreamWriter write = File.CreateText(logFile))

                    {

                        write.WriteLine("----------记录日志----------");

                    }

                }

            }

            catch { }

        }

        /// <summary>

        /// 追加一条信息

        /// </summary>

        /// <param name="text"></param>

        public void Write(string text)

        {

            try

            {

                using (StreamWriter sw = new StreamWriter(logFile, true, Encoding.UTF8))

                {

                    sw.Write(string.Format("{0}>{1}", DateTime.Now.ToString("[yyyy-MM-dd HH:mm:ss] "), text));

                }

            }

            catch { }

        }

        /// <summary>

        /// 追加一行信息

        /// </summary>

        /// <param name="text"></param>

        public void WriteLine(string text)

        {

            try

            {

                using (StreamWriter sw = new StreamWriter(logFile, true, Encoding.UTF8))

                {

                    sw.Write(string.Format("\r\n{0}>{1}", DateTime.Now.ToString("[yyyy-MM-dd HH:mm:ss] "), text));

                }

            }

            catch { }

        }

    }