public override void SetLogger()
{
var listener = new FoobarEventListener();
listener.EventSourceCreated += (sender, args) =>
{
if (args.EventSource.Name == "Microsoft-Extensions-Logging")
{
listener.EnableEvents(args.EventSource, EventLevel.LogAlways);
}
};
listener.EventWritten += (sender, args) =>
{
if (args.EventName == "FormattedMessage")
{
var payload = args.Payload;
var payloadNames = args.PayloadNames;
var indexOfLevel = payloadNames.IndexOf("Level");
var indexOfCategory = args.PayloadNames.IndexOf("LoggerName");
var indexOfEventId = args.PayloadNames.IndexOf("EventId");
var indexOfMessage = args.PayloadNames.IndexOf("FormattedMessage");
Console.WriteLine($"{payload[indexOfLevel],-11}:{payload[indexOfCategory]}[{payload[indexOfEventId]}]");
Console.WriteLine($"{"",-13}{payload[indexOfMessage]}");
}
};
_logger = LoggerFactory.Create(builder =>
{
/**
* Trace文件输出日志
* 需要导入Microsoft.Extensions.Logging.TraceSource包
* 会注册TraceSourceLoggerProvider
*/
builder.AddTraceSource(new SourceSwitch("default", "All"), new DefaultTraceListener {
LogFileName = "trace.log"
});
/**
* 事件输出日志
* 需要导入Microsoft.Extensions.Logging.EventSource包
* EventSourceLoggerProvider
*/
builder.AddEventSourceLogger();
})
.CreateLogger <Program>();
}
static void Main(string[] args)
{
var listener = new FoobarEventListener();
listener.EventSourceCreated += (sender, args) =>
{
if (args.EventSource.Name == "Microsoft-Extensions-Logging")
{
listener.EnableEvents(args.EventSource, EventLevel.LogAlways);
}
};
listener.EventWritten += (sender, args) =>
{
if (args.EventName == "FormattedMessage")
{
var payload = args.Payload;
var payloadNames = args.PayloadNames;
var indexOfLevel = payloadNames.IndexOf("Level");
var indexOfCategory = payloadNames.IndexOf("LoggerName");
var indexOfEventId = payloadNames.IndexOf("EventId");
var indexOfMessage = payloadNames.IndexOf("FormattedMessage");
Console.WriteLine($"{(LogLevel)payload[indexOfLevel], -11} : {payload[indexOfCategory]} [{payload[indexOfEventId]}]");
Console.WriteLine($"{"", -13}{payload[indexOfMessage]}");
}
};
var logger = new ServiceCollection()
.AddLogging(builder => builder.AddTraceSource(new SourceSwitch("default", "All"),
new DefaultTraceListener {
LogFileName = "trace.log"
}).AddEventSourceLogger())
.BuildServiceProvider()
.GetRequiredService <ILogger <Program> >();
var levels = (LogLevel[])Enum.GetValues(typeof(LogLevel));
levels = levels.Where(it => it != LogLevel.None).ToArray();
var eventId = 1;
Array.ForEach(levels, level => logger.Log(level, eventId++, "This is a/an {0} log message", level));
}