NLOG：创建相同 class 的多个实例，将日志写入同一文件

Question

我正在努力适应 NLOG，但发现很难为同一 class 的多个实例设置日志文件。每个 class 都是在不同的线程上创建的。请在下面找到示例代码：

    {
        ILogger mLogger;
        public string Name { get; set; }
        public string SecondName { get; set; }
        private string mFilePath = @"C:\Logs\";
        public test(string name, string secondname)
        {
            var target = new FileTarget(name) { FileName = mFilePath + name + ".txt" };
            var config = new LoggingConfiguration();
            config.AddRule(LogLevel.Info, LogLevel.Info, target);
            LogManager.Configuration = config;
            mLogger = LogManager.GetLogger(name);
            LogManager.ReconfigExistingLoggers();
            mLogger.Info("Hi from :" + name);
        }
    }
    static void Main(string[] args)
        {
            new Thread(new ThreadStart(() => { new test("Stuart", "Broad"); })).Start();
            new Thread(new ThreadStart(() =>
            {
                new test("John", "Smith");
            })).Start();
            new Thread(new ThreadStart(() =>
            {
                new test("Virat", "Kohli");
            })).Start();
            new Thread(new ThreadStart(() =>
            {
                new test("Christiano", "Ronaldo");
            })).Start();

            new Thread(new ThreadStart(() =>
                {
                    new test("Pat", "cummins");
                })).Start();
            Console.Read();
        }

来自一个文件 Christiano.txt

有人可以帮我配置一下吗？

谢谢。

Answer 1

LogManager.Configuration 是一个静态变量。当您分配它时，您会影响其他所有人。

而是为每个线程提供一个唯一的记录器。同一个 FileTarget 可以处理多个 Loggers。

{
    ILogger mLogger;
    public string Name { get; set; }
    public string SecondName { get; set; }
    public test(string name, string secondname)
    {
        mLogger = LogManager.GetLogger(name);
        mLogger.Info("Hi from :" + name);
    }
}
static void Main(string[] args)
    {
        string mFilePath = @"C:\Logs\";
        var target = new FileTarget(name) { FileName = Path.Combine(mFilePath, "${logger}.txt") };
        var config = new LoggingConfiguration();
        config.AddRule(LogLevel.Info, LogLevel.Info, target);
        LogManager.Configuration = config;

        new Thread(new ThreadStart(() => { new test("Stuart", "Broad"); })).Start();
        new Thread(new ThreadStart(() =>
        {
            new test("John", "Smith");
        })).Start();
        new Thread(new ThreadStart(() =>
        {
            new test("Virat", "Kohli");
        })).Start();
        new Thread(new ThreadStart(() =>
        {
            new test("Christiano", "Ronaldo");
        })).Start();

        new Thread(new ThreadStart(() =>
            {
                new test("Pat", "cummins");
            })).Start();
        Console.Read();
    }

或者您可以 assign names to the threads，并在 FileName-Layout 中使用 NLog ${threadname} 而不是 ${logger}。

另一种替代方法是使用 NLog MappedDiagnosticsLogicalContext.SetScoped("TestName", name) 创建范围并在 FileName-Layout 中使用 ${mdlc:TestName}。这也将允许您将初始上下文流向异步任务。

NLOG：创建相同 class 的多个实例，将日志写入同一文件

NLOG: Creating multiple instances of same class writing log to same file

c#

nlog