log4net 純代碼配置

當需要輸出的日誌很多的時候，每次修改config都很麻煩，於是想可不可以動態生成。

網上找的案例都是獲取單個appender/logger的，此處例子是任意logger，appender相同

log4net的pattern裏面關於線程的顯示規則是，有線程名用名字，無線程名用線程號。Nlog 可以分別指定

例子如下

 1         public static ILog GetLoggerByName(string name)
 2         {
 3             if (LogManager.Exists(name) == null)
 4             {
 5 
 6                 // Pattern Layout defined
 7                 PatternLayout patternLayout = new PatternLayout();
 8                 patternLayout.ConversionPattern = "%date %thread %level %logger - %message%newline";
 9                 patternLayout.ActivateOptions();
10 
11                 // configurating the RollingFileAppender object
12                 RollingFileAppender appender = new RollingFileAppender();
13                 appender.Name = name;                
14                 appender.AppendToFile = true;
15                 appender.File = $"Log\\{name}.log";
16                 appender.StaticLogFileName = true;
17                 appender.PreserveLogFileNameExtension = true;
18                 appender.LockingModel = new FileAppender.MinimalLock();
19                 appender.Layout = patternLayout;
20                 appender.MaxSizeRollBackups = 512;
21                 appender.MaximumFileSize = "150MB";
22                 appender.RollingStyle = RollingFileAppender.RollingMode.Composite;
23                 appender.ActivateOptions();
24 
25                 Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository();
26 
27                 var loger = hierarchy.GetLogger(name, hierarchy.LoggerFactory); //!!! 此處寫法是重點，不容更改
28                 loger.Hierarchy = hierarchy;
29                 loger.AddAppender(appender);
30                 loger.Level = Level.All;
31                 
32                 BasicConfigurator.Configure();//!!! 此處寫法是重點，不容更改
33 
34                 var appname = Assembly.GetEntryAssembly().GetName().Name;
35                 var version= Assembly.GetEntryAssembly().GetName().Version;
36                 loger.Log(Level.Info, $"Log name {name} created for Application: {appname} Version: {version}", null);                
37             }
38             var log = LogManager.GetLogger(name);
39             return log;
40         }

 1        public static void SetMinLogLevel(Level level,string name="")
 2         {
 3             if(string.IsNullOrEmpty(name))
 4             {
 5                 Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository();
 6                 hierarchy.Threshold = level;
 7             }
 8             else
 9             {
10                 Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository();
11                 if(hierarchy.Exists(name) is Logger loger)
12                 {
13                     loger.Level = level;
14                 }
15             }
16         }