log4net学习笔记(一)-WPF
1.创建MS SQL Server日志表
- CREATE TABLE [dbo].[Log] (
- [Id] [int] IDENTITY (1, 1) NOT NULL,
- [Date] [datetime] NOT NULL,
- [Thread] [varchar] (255) NOT NULL,
- [Level] [varchar] (50) NOT NULL,
- [Logger] [varchar] (255) NOT NULL,
- [Message] [varchar] (4000) NOT NULL,
- [Exception] [varchar] (2000) NULL
- )
2.日志表配置-log4net.config中添加（把参数改成自己的,启用了保存到数据库和csv文件）
<?xml version="1.0" encoding="utf-8"?>
log4net-日志表配置
3.引用log4net的Nuget包
4.添加log4net-helper
（1）第一版
using log4net; using System; [assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)] namespace HOST_CONTROL_CENTER.Uril.LogHelper { ////// Log4NetHelper /// public class Log4NetHelper { #region 执行SQL日志 /// /// 普通日志 /// /// 日志内容 public static void WriteInfo(Type type, string message) { ILog log = log4net.LogManager.GetLogger("Info"); // 可以改成type typeof(类) if (log.IsInfoEnabled) { log.Info(message); } log = null; } /// /// 警告日志 /// /// 警告日志 public static void WriteWarn(Type type, string message) { ILog log = log4net.LogManager.GetLogger("Warn"); if (log.IsWarnEnabled) { log.Warn(message); } log = null; } /// /// 错误日志 /// /// 错误日志 public static void WriteError(Type type, string message) { ILog log = log4net.LogManager.GetLogger("Error"); if (log.IsInfoEnabled) { log.Error(message); } log = null; } #endregion public static void TestLog(string aa= "错误") { ILog log = log4net.LogManager.GetLogger("Info"); log.Error("Hello World!"); } } }
（2）第二版（用这个就够用）
1 using log4net; 2 using System; 3 [assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)] 4 namespace HOST_CONTROL_CENTER.Uril.LogHelper 5 { 6 ///7 /// Log4NetHelper 8 /// 9 public class Log4NetHelper 10 { 11 #region 执行SQL日志 12 /// 13 /// 普通日志 14 /// 15 /// 日志内容 16 public static void WriteInfo(Type type, string message) 17 { 18 ILog log = log4net.LogManager.GetLogger(type); 19 if (log.IsInfoEnabled) 20 { 21 log.Info(message); 22 } 23 log = null; 24 } 25 26 /// 27 /// 警告日志 28 /// 29 /// 警告日志 30 public static void WriteWarn(Type type, string message) 31 { 32 ILog log = log4net.LogManager.GetLogger(type); 33 if (log.IsWarnEnabled) 34 { 35 log.Warn(message); 36 } 37 log = null; 38 } 39 40 /// 41 /// 错误日志 42 /// 43 /// 错误日志 44 public static void WriteError(Type type, string message) 45 { 46 ILog log = log4net.LogManager.GetLogger(type); 47 if (log.IsInfoEnabled) 48 { 49 log.Error(message); 50 } 51 log = null; 52 } 53 #endregion 54 55 public static void TestLog(string aa= "错误") 56 { 57 ILog log = log4net.LogManager.GetLogger("Info"); 58 log.Error("Hello World!"); 59 } 60 } 61 }
测试例子：
1 private void mitPInfo_Click(object sender, RoutedEventArgs e) 2 { 3 Log4NetHelper.WriteInfo(typeof(MianShow), "信息"); 4 } 5 6 private void mitPWarn_Click(object sender, RoutedEventArgs e) 7 { 8 Log4NetHelper.WriteWarn(typeof(MianShow), "警告"); 9 } 10 11 private void mitPError_Click(object sender, RoutedEventArgs e) 12 { 13 try{ 14 int a = Convert.ToInt32("aa"); 15 } 16 catch 17 { 18 Log4NetHelper.WriteError(typeof(MianShow), "a错误"); 19 } 20 } 21 22 private void mitPError1_Click(object sender, RoutedEventArgs e) 23 { 24 try 25 { 26 int a = Convert.ToInt32("aa"); 27 Log4NetHelper.TestLog("a错误"); 28 } 29 catch 30 { 31 Log4NetHelper.TestLog("a错误"); 32 } 33 }
结果：
日志文件：
数据库：
（3）其他版本：
1 using log4net; 2 using log4net.Appender; 3 using log4net.Config; 4 using log4net.Repository.Hierarchy; 5 using System; 6 using System.IO; 7 8 //[assembly: XmlConfigurator(ConfigFile = "log4net.config", Watch = true)] 9 namespace HOST_CONTROL_CENTER.Uril.LogHelper 10 { 11 public class Log4Helper2 12 { 13 private static ILog ILogger; 14 private static string configFile = "log4net.config"; 15 16 static Log4Helper2() 17 { 18 if (File.Exists(Log4NetConfigFile)) 19 { 20 if (Environment.OSVersion.Platform == PlatformID.Win32NT) 21 { 22 XmlConfigurator.ConfigureAndWatch(new FileInfo(Log4NetConfigFile)); 23 } 24 else 25 { 26 XmlConfigurator.Configure(new FileInfo(Log4NetConfigFile)); 27 } 28 } 29 else 30 { 31 BasicConfigurator.Configure(); 32 } 33 34 ILogger = GetLogger(typeof(Log4Helper2)); 35 } 36 37 #region Abbributes 38 public static string Log4NetConfigFile 39 { 40 get 41 { 42 return Path.Combine(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location), configFile); 43 44 } 45 } 46 47 public static ILog GetLogger(System.Type type) 48 { 49 return LogManager.GetLogger(type); 50 } 51 #endregion 52 53 #region 执行SQL日志 54 public static void Info(string message) 55 { 56 ILogger.Info(message); 57 } 58 59 public static void Warn(string message) 60 { 61 ILogger.Warn(message); 62 } 63 64 public static void Error(string message) 65 { 66 ILogger.Error(message); 67 } 68 #endregion 69 70 ///71 /// 清理log文件 72 /// 73 /// 74 public static void ClearOldLogFiles(string keepDays) 75 { 76 int days = 0; 77 int.TryParse(keepDays, out days); 78 if (days <= 0) 79 { 80 return; 81 } 82 83 try 84 { 85 DateTime now = DateTime.Now; 86 87 Hierarchy hierarchy = (Hierarchy)LogManager.GetLoggerRepository(); 88 foreach (IAppender appender in hierarchy.Root.Appenders) 89 { 90 if (appender is RollingFileAppender) 91 { 92 string logPath = ((RollingFileAppender)appender).File; 93 DirectoryInfo dir = new DirectoryInfo(logPath.Substring(0, logPath.LastIndexOf("\\"))); 94 95 foreach (FileInfo file in dir.GetFiles()) 96 { 97 if (file.LastWriteTime < now.AddDays(-days)) 98 { 99 file.Delete(); 100 } 101 } 102 } 103 } 104 } 105 catch 106 { 107 } 108 } 109 } 110 }
参考文档：https://logging.apache.org/log4net/release/config-examples.html