Serilog 范围级别过滤 [英] Serilog Range level filtering

问题描述

在 log4net 中，您可以选择声明具有 levelMin levelMax 范围的不同文件附加器.这样你就可以有一个用于调试的文件和一个用于错误的文件.如何在 serilog 文件接收器中具有相同的行为.我有这个代码，但你只能指定 MinimumLevel

In log4net you have the option to declare different fileappenders with a levelMin levelMax range. In that way you can have one file for debug and one file for error. How can I have the same behavior in serilog file sink. I have this code but you are only allowed to specify MinimumLevel

Log.Logger = new LoggerConfiguration()
            .WriteTo.Async(a =>
            {
                a.RollingFile($"{AppDomain.CurrentDomain.BaseDirectory}\Logs\error.txt", 
                    restrictedToMinimumLevel: Serilog.Events.LogEventLevel.Error);
            })
            .WriteTo.Async(a =>
            {
                a.RollingFile($"{AppDomain.CurrentDomain.BaseDirectory}\Logs\log.txt",
                    restrictedToMinimumLevel: Serilog.Events.LogEventLevel.Debug);
            })
            .CreateLogger();

它创建了两个文件，但在 log.txt 中我也看到了错误级别的消息

It creates two files but in the log.txt I also see the error level messages

推荐答案

在 Serilog 中你可以使用 子记录器，每个子记录器都应用了过滤器:

In Serilog you can do use sub-loggers with a filter applied to each of them:

Log.Logger = new LoggerConfiguration()
    .MinimumLevel.Verbose()
    .WriteTo.Logger(c =>
        c.Filter.ByIncludingOnly(e => e.Level == LogEventLevel.Debug)
            .WriteTo.File("Debug.log"))
    .WriteTo.Logger(c =>
        c.Filter.ByIncludingOnly(e => e.Level == LogEventLevel.Error)
            .WriteTo.File("Error.log"))
    .CreateLogger();

Log.Debug("This goes to Debug.log only");
Log.Error("This goes to Error.log only");

Log.CloseAndFlush();

或者，如果您愿意，也可以使用 Serilog.Sinks.Map将 LogEventLevel 映射到文件.

Alternatively, you can use the Serilog.Sinks.Map if you just want to map a LogEventLevel to a file.

Log.Logger = new LoggerConfiguration()
    .MinimumLevel.Verbose()
    .WriteTo.Map(evt => evt.Level, (level, wt) => wt.File($"{level}.log"))
    .CreateLogger();

Log.Debug("This goes to Debug.log only");
Log.Error("This goes to Error.log only");

Log.CloseAndFlush();

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