目錄

一、日志Sink(接收器)

二、Trace追蹤實現日志

三、日志滾動

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一、日志Sink(接收器)

安裝NuGet包：Serilog

Sink有很多種，這里介紹兩種：

????????????????Console接收器（安裝Serilog.Sinks.Console）;

????????????????File接收器（安裝Serilog.Sinks.File）;

MinimumLevel：最小記錄級別

rollingInterval:生成日志文件周期

outputTemplate:輸出日志模板

繼承ILogEventSink接口實現?Emit：當Sink器接收到新日志時觸發

通過該接口將接收器接收的日志添加進內部日志集合

將該接口實現類實例化對象通過WriteTo.Sink(myEventSink)與Logger綁定

實現?ILogEventSink接口示例：

 public List<string> Logs = new List<string>();private readonly ITextFormatter _formatter=new MessageTemplateTextFormatter("Message:{Message}  [{Level}]  Location:{FilePath}[{LineNumber}]");public void Emit(LogEvent logEvent){if (logEvent != null){var textWriter=new StringWriter();_formatter.Format(logEvent, textWriter);Logs.Add(textWriter.ToString());}}

?Main程序：

  MyEventSink myEventSink = new MyEventSink();string path = "Logs\\Error\\.txt";string outputTemplate = "{NewLine}Date: {Timestamp:yyyy-MM-dd HH:mm:ss.fff}\tLevel: {Level}\tCallName: {SourceContext}->{MemberName}"+ "{NewLine}Path: {FilePath}[{LineNumber}]"+ "{NewLine}Message: {Message}";Log.Logger = new LoggerConfiguration().Enrich.FromLogContext()//記錄相關上下文信息.MinimumLevel.Debug().WriteTo.Sink(myEventSink).WriteTo.Logger(log => log.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Error).WriteTo.File(path, rollingInterval: RollingInterval.Day, outputTemplate: outputTemplate)).WriteTo.Console().CreateLogger();Log.Warning("*****************Warning***************");Log.Logger.Information("*******************Info****************");Log.Logger.CallError<Test>("#####################Error##################");foreach (string str in myEventSink.Logs){Console.WriteLine(str);}

    static class LogExtension{public static void CallError<T>(this ILogger logger, string message,[CallerMemberName] string meberName = "",[CallerFilePath] string filepath = "",[CallerLineNumber] int lineNum = 0)=> logger.ForContext<T>().ForContext("MemberName", meberName).ForContext("FilePath", filepath).ForContext("LineNumber", lineNum).Error(message);public static void CallError<T>(this ILogger logger, Exception e, string message,[CallerMemberName] string meberName = "",[CallerFilePath] string filepath = "",[CallerLineNumber] int lineNum = 0)=> logger.ForContext<T>().ForContext("MemberName", meberName).ForContext("FilePath", filepath).ForContext("LineNumber", lineNum).Error(e, message);}

二、Trace追蹤實現日志

繼承抽象類TraceListener，重寫方法TraceEvent

注意：添加監聽對象Trace.Listeners.Add(this);

        public override void TraceEvent(TraceEventCache? eventCache, string source, TraceEventType eventType, int id, string? message){switch (eventType){case TraceEventType.Error:Log.Logger.CallError<MyTraceListen>(message);break;case TraceEventType.Warning:Log.Logger.Warning(message);break;case TraceEventType.Information:Log.Logger.Information(message);break;default:break;}}

三、日志滾動

通過ObservableCollection類的CollectionChanged事件實現日志自動滾動到底部：

????????集合改變觸發事件，更改附加屬性AutoScroll值，值更改觸發CallBack將日志滾動到底部；

注意：MouseEnter與MouseLeave兩事件的響應原因：查看日志時，防止日志自動滾動到底部；

        <DataGrid attach:ScrollHelper.AutoScroll="{Binding AutoScroll}"AutoGenerateColumns="False"CanUserAddRows="False"CanUserDeleteRows="False"CanUserReorderColumns="False"CanUserResizeColumns="False"CanUserResizeRows="False"CanUserSortColumns="False"ItemsSource="{Binding LogService.Logs}"><i:Interaction.Triggers><i:EventTrigger EventName="MouseEnter"><i:InvokeCommandAction Command="{Binding MouseEnterCommand}" /></i:EventTrigger><i:EventTrigger EventName="MouseLeave"><i:InvokeCommandAction Command="{Binding MouseLeaveCommand}" /></i:EventTrigger></i:Interaction.Triggers><DataGrid.Columns><DataGridTextColumn Binding="{Binding Time}" Header="時間" /><DataGridTextColumn Binding="{Binding Lev}" Header="級別" /><DataGridTextColumn Binding="{Binding Message}" Header="信息"><DataGridTextColumn.ElementStyle><Style><Setter Property="TextBlock.TextWrapping" Value="Wrap" /><Setter Property="TextBlock.TextAlignment" Value="Left" /></Style></DataGridTextColumn.ElementStyle></DataGridTextColumn></DataGrid.Columns><DataGrid.RowStyle><Style TargetType="DataGridRow" BasedOn="{StaticResource DataGridRowStyle}"><Style.Triggers><DataTrigger Binding="{Binding Lev}" Value="Error"><Setter Property="Foreground" Value="Red"/></DataTrigger><DataTrigger Binding="{Binding Lev}" Value="Warn"><Setter Property="Foreground" Value="Orange"/></DataTrigger></Style.Triggers></Style></DataGrid.RowStyle></DataGrid>

        public LogService LogService { get; set; }=LogService.GetInstance();private bool _autoScroll;public bool AutoScroll{get { return _autoScroll; }set => SetProperty(ref _autoScroll, value);}[RelayCommand]public void MouseEnter(){LogService._logs.CollectionChanged -= Scroll;}[RelayCommand]public void MouseLeave(){LogService._logs.CollectionChanged += Scroll;}private void Scroll(object sender, NotifyCollectionChangedEventArgs e){AutoScroll = !AutoScroll;}public MainWinViewModel(){LogService.OpenListen();LogService._logs.CollectionChanged += Scroll;}