C#中使用 Log4net 日誌輸出到本地檔案、Textbox或Listview
阿新 • • 發佈：2021-11-09
方法一: 直接將配置檔案配置在app.config
<configSections> <!--在配置選項中加入log4net的引用--> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/> </configSections> <log4net> <appender name="LogFile" type="log4net.Appender.RollingFileAppender,log4net"> <param name="File" value="../../logs/log.txt" /> <!--定義用檔案來儲存日誌，生成的檔案log.txt放在logs目錄中，logs資料夾和應用程式生成的bin資料夾在同一目錄下。--> <param name="AppendToFile" value="false" /> <param name="RollingStyle" value="Date" /> <param name="DatePattern" value="yyyy.MM.dd" /> <param name="StaticLogFileName" value="true" /> <layout type="log4net.Layout.PatternLayout,log4net"> <!--定義輸出風格--> <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" /> <param name="Header" value=" ----------------------header-------------------------- "/> <param name="Footer" value=" ----------------------footer-------------------------- " /> </layout> </appender> <appender> <!--一個配置檔案可以有很多appender,一個appender節就相當於一個日誌輸出介質或方法。--> </appender> <logger name="logApp"> <!--定義logger物件的名字為logApp,以方便在程式碼中使用logger--> <!--配置項可以不配置--> <level value="ALL" /> <!--定義輸出的資訊等級為所有其中包括Fatal.Error.Warn.Info.Debug--> </logger> <root> <!--定義日誌輸出的方式和等級--> <level value="INFO" /> <appender-ref ref="LogFile" /><!--選擇了檔案輸出，注意粗體部分對應的名稱--> </root> </log4net>
方法二：單獨將配置檔案配置在log4net.config中,網上大多數都是這種方法,但是卻沒有說明關鍵的一步
參考連結：http://www.cnblogs.com/zfanlong1314/p/3662679.html
1. 新建一個配置檔案,log4net.config配置方法同成web.config或app.config一致;
2.如果windows應用程式請把配置檔案設為:複製到輸出目錄 修改方法:在log4net.config上右擊-->屬性--->把"複製到輸出目錄"值改為true;
3.在要用到log4的地方名稱空間上邊加上:[assembly: log4net.Config.XmlConfigurator(ConfigFile ="log4net.config", Watch =true)]
輸出到自定義Textbox日誌輸出
using System; using System.Collections.Generic; using System.Linq; using System.Text; using log4net.Appender; using System.Windows.Forms; using log4net.Core; using log4net.Layout; namespace log4myself { /// <summary> /// Usage: /// log4net.Config.BasicConfigurator.Configure(); /// var logPattern = "%date [%thread] %-5level %logger !%M - %message%newline"; /// var logAppender = new TextBoxBaseAppender() /// { /// TextBox = this.textBox2, /// Layout = new PatternLayout(logPattern) /// }; /// /// ((log4net.Repository.Hierarchy.Hierarchy)log4net.LogManager.GetLoggerRepository()).Root.AddAppender(logAppender); /// </summary> public class TextBoxBaseAppender : AppenderSkeleton { public TextBoxBase TextBox { get; set; } public TextBoxBaseAppender() { } protected override void Append(LoggingEvent loggingEvent) { if (this.TextBox == null) { return; } if (!this.TextBox.IsHandleCreated) { return; } if (this.TextBox.IsDisposed) { return; } var patternLayout = this.Layout as PatternLayout; var str = string.Empty; if (patternLayout != null) { str = patternLayout.Format(loggingEvent); if (loggingEvent.ExceptionObject != null) { str += loggingEvent.ExceptionObject.ToString() + Environment.NewLine; } } else { str = loggingEvent.LoggerName + "-" + loggingEvent.RenderedMessage + Environment.NewLine; } if (!this.TextBox.InvokeRequired) { printf(str); } else { this.TextBox.BeginInvoke((MethodInvoker)delegate { if (!this.TextBox.IsHandleCreated) { return; } if (this.TextBox.IsDisposed) { return; } printf(str); }); } } private void printf(string str) { //若是超過10行 則清楚 if (TextBox.Lines.Length > 50) { TextBox.Clear(); } this.TextBox.AppendText(str); } } }
在Form中使用的時候的程式碼為
//讀取配置檔案的資訊 private ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); private void frmText_Load(object sender, EventArgs e) { //設定textbox列印日誌 --------------------------------------------------- var logPattern = "%d{yyyy-MM-dd HH:mm:ss} --%-5p-- %m%n"; var textBox_logAppender = new TextBoxBaseAppender() { TextBox = this.textBox1,//註釋後 就只有檔案log Layout = new PatternLayout(logPattern) }; //相當於root標籤下的 <appender-ref ref="LogFile" /> log4net.Config.BasicConfigurator.Configure(textBox_logAppender); }
輸出到Listview程式碼為：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using log4net.Appender; using System.Windows.Forms; using log4net.Core; using log4net.Layout; namespace log4myself { public class ListViewBaseAppender : AppenderSkeleton { public ListView listView { get; set; } public ListViewBaseAppender() { } protected override void Append(LoggingEvent loggingEvent) { if (this.listView == null) { return; } if (!this.listView.IsHandleCreated) { return; } if (this.listView.IsDisposed) { return; } var patternLayout = this.Layout as PatternLayout; var str = string.Empty; if (patternLayout != null) { str = patternLayout.Format(loggingEvent); if (loggingEvent.ExceptionObject != null) { str += loggingEvent.ExceptionObject.ToString() + Environment.NewLine; } } else { str = loggingEvent.LoggerName + "-" + loggingEvent.RenderedMessage + Environment.NewLine; } if (!this.listView.InvokeRequired) { printf(str); } else { this.listView.BeginInvoke((MethodInvoker)delegate { if (!this.listView.IsHandleCreated) { return; } if (this.listView.IsDisposed) { return; } printf(str); }); } } private void printf(string str) { if (listView.Items.Count>50) { listView.Items.Clear(); } ListViewItem item = new ListViewItem(); item.Text = str.ToString(); listView.BeginUpdate(); listView.Items.Add(item); listView.Items[listView.Items.Count - 1].EnsureVisible();//滾動到最後 listView.EndUpdate(); } } }
在Form中使用的時候的程式碼為：
//讀取配置檔案的資訊 private ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); private void frmText_Load(object sender, EventArgs e) { //設定 ListView 列印日誌------------------------------------------------------ var listview_logAppender = new ListViewBaseAppender() { listView = this.listView1,//註釋後 就只有檔案log Layout = new PatternLayout(logPattern) }; //相當於root標籤下的 <appender-ref ref="LogFile" /> log4net.Config.BasicConfigurator.Configure(listview_logAppender); }
十分感謝：
https://www.cnblogs.com/rainbow70626/p/6168338.html