[开发工具]C#日志记录帮助类

1、背景

项目程序用于记录程序运行状态的日志。包含运行信息，异常错误等。

2、程序源码

/// <summary>
    /// 通用日志记录帮助类
    /// 创建人：gyc
    /// 创建事件：2022-03-17
    /// 说明：采用反汇编技术，解析Wesun.Utils.LogHelper.dll获得
    /// 根目录LogHelper.config用于设置日志等级。
    /// </summary>
    public static class LogHelper
    {
        private static string _configFile = AppDomain.CurrentDomain.BaseDirectory + "LogHelper.config";

        private static string _logDir = AppDomain.CurrentDomain.BaseDirectory + "log";

        private static string _loglevel = LogHelper.GetValue("loglevel", "error");

        public static void Error(string msg)
        {
            LogHelper.Error(msg, "");
        }

        public static void Error(string msg, string locate)
        {
            try
            {
                string text = LogHelper._logDir + "\\LogService" + DateTime.Now.ToString("yyyy-MM-dd") + ".log";
                LogHelper.CreateLogDir();
                LogHelper.CreateLogFile(text);
                string text2 = string.Format("[{0}]Error {1}:{2}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"), locate, msg);
                File.AppendAllLines(text, new string[]
                {
                    text2
                });
            }
            catch
            {
            }
        }

        public static void Info(string msg)
        {
            LogHelper.Info(msg, "");
        }

        public static void Info(string msg, string locate)
        {
            try
            {
                string text = LogHelper._logDir + "\\LogService" + DateTime.Now.ToString("yyyy-MM-dd") + ".log";
                if (LogHelper._loglevel.Equals("info", StringComparison.OrdinalIgnoreCase) || LogHelper._loglevel.Equals("debug", StringComparison.OrdinalIgnoreCase))
                {
                    LogHelper.CreateLogDir();
                    LogHelper.CreateLogFile(text);
                    string text2 = string.Format("[{0}]Info {1}:{2}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"), locate, msg);
                    File.AppendAllLines(text, new string[]
                    {
                        text2
                    });
                }
            }
            catch
            {
            }
        }

        public static void Debug(string msg)
        {
            LogHelper.Debug(msg, "");
        }

        public static void Debug(string msg, string locate)
        {
            try
            {
                string text = LogHelper._logDir + "\\LogService" + DateTime.Now.ToString("yyyy-MM-dd") + ".log";
                if (LogHelper._loglevel.Equals("debug", StringComparison.OrdinalIgnoreCase))
                {
                    LogHelper.CreateLogDir();
                    LogHelper.CreateLogFile(text);
                    string text2 = string.Format("[{0}]Debug {1}:{2}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"), locate, msg);
                    File.AppendAllLines(text, new string[]
                    {
                        text2
                    });
                }
            }
            catch
            {
            }
        }

        private static void CreateLogDir()
        {
            try
            {
                if (!Directory.Exists(LogHelper._logDir))
                {
                    Directory.CreateDirectory(LogHelper._logDir);
                }
            }
            catch
            {
            }
        }

        private static void CreateLogFile(string a_strlogFile)
        {
            try
            {
                if (!File.Exists(a_strlogFile))
                {
                    using (new FileStream(a_strlogFile, FileMode.Create))
                    {
                    }
                }
            }
            catch
            {
            }
        }

        private static string GetValue(string key)
        {
            string result;
            try
            {
                string text = AppDomain.CurrentDomain.BaseDirectory + "app.config";
                if (!File.Exists(text))
                {
                    string contents = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<configuration>\r\n<appSettings> \r\n<add key=\"loglevel\" value=\"error\" />\r\n</appSettings>\r\n</configuration>";
                    File.WriteAllText(text, contents);
                }
                XmlDocument xmlDocument = new XmlDocument();
                xmlDocument.Load(text);
                string xpath = "//add [@key=\"" + key + "\"]/@value";
                XmlNode xmlNode = xmlDocument.SelectSingleNode(xpath);
                result = xmlNode.Value;
            }
            catch
            {
                result = "";
            }
            return result;
        }

        private static string GetValue(string key, string valueDefault)
        {
            string text = "";
            string result;
            try
            {
                text = LogHelper.GetValue(key);
            }
            catch
            {
                result = valueDefault;
                return result;
            }
            if (text == "")
            {
                result = valueDefault;
            }
            else
            {
                result = text;
            }
            return result;
        }
    }

2、使用方式

①项目生成目录下，找到LogHelper.config文件，设置日志记录等级

<add key="loglevel" value="info" />

②项目中使用

?LogHelper.Info(msg);

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