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This article mainly introduces the open source logging component Log4Net how to use, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Log4net is an excellent open source logging component under .net. Log4net logging is very powerful. It can divide the log into different levels, output to different media in different formats.

Use steps

Add the Nuget package to the project, search for and install the Log4Net component.

Add a configuration file to the project and configure the node content of the log4net as follows. It is recommended not to use the App.config file created automatically by VS, as it will overwrite the compiled app.exe.config file, but the contents of the file may have other definitions. To avoid interference, create a separate configuration file, such as app.exe.log4net:

Register the configuration file in the AssemblyInfo.cs file of the project:

/ / register the Log4Net.config configuration file for the project [assembly: log4net.Config.XmlConfigurator (ConfigFileExtension = "log4net", Watch = true)]

Add log class

/ log4net access class / public class LogHelper {private LogHelper () {} public static readonly log4net.ILog loginfo = log4net.LogManager.GetLogger ("loginfo"); public static readonly log4net.ILog logerror = log4net.LogManager.GetLogger ("logerror"); public static void SetConfig () {log4net.Config.XmlConfigurator.Configure ();} public static void SetConfig (FileInfo configFile) {log4net.Config.XmlConfigurator.Configure (configFile) } public static void WriteLog (string info) {if (loginfo.IsInfoEnabled) {loginfo.Info (info);}} public static void WriteLog (string info, Exception se) {if (logerror.IsErrorEnabled) {logerror.Error (info, se);}

Use logging

Try {/ / record normal log LogHelper.WriteLog ("operation successful!") } catch (Exception ex) {/ / record exception log LogHelper.WriteLog ("operation failed!" , ex);}

As you can see from the definition of the LogHelper class, there are two overloaded WriteLog methods, the WriteLog method that contains only a single message text parameter is used to record the normal log, and the WriteLog method with two parameters is used to record the exception log, which requires passing in an instance of Exception.

The program automatically creates a Log folder and two subfolders of LogError and LogInfo locally, the normal log recorded by the WriteLog method of a single parameter is automatically saved in LogInfo, and the abnormal log recorded by the WriteLog method of the two parameters is automatically saved in LogError.

The recording format of the diary text can be specified by modifying the configuration file of log4net. Here, a simple output format is defined:

"% date:% m% n"

Represents the date and time of logging: the content of the message.

Thank you for reading this article carefully. I hope the article "how to use the open source logging module Log4Net" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and follow the industry information channel. More related knowledge is waiting for you to learn!

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