[英]Using NLog in asp.net core 2.0 web application
哪个是在asp.net core 2.0 Web应用程序中使用Nlog的最佳方式
我找到了很多不同的解决方案如何配置。 这是其中两个。 还有其他更好的方法吗?
A)在启动服务器之前创建记录器:
public class Program
{
public static void Main(string[] args)
{
// NLog: setup the logger first to catch all errors
var logger = NLogBuilder.ConfigureNLog("NLog.config").GetCurrentClassLogger();
try
{
logger.Debug("init main");
BuildWebHost(args).Run();
}
catch (Exception e)
{
//NLog: catch setup errors
logger.Error(e, "Stopped program because of exception");
throw;
}
}
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>().UseNLog() // use NLog for DI Logger
.Build();
}
B)配置内部启动
public class Startup
{
public Startup(IHostingEnvironment env, IConfiguration configuration)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
loggerFactory.AddNLog();
loggerFactory.ConfigureNLog("nlog.config");
LogManager.Configuration.Variables["connectionString"] = Configuration.GetConnectionString("myDb");
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseMvc();
}
}
有关于此的维基文档:
https://github.com/NLog/NLog.Web/wiki/Getting-started-with-ASP.NET-Core-2
要注入连接字符串之类的自定义数据,只需创建并注册自定义布局渲染器:
https://github.com/NLog/NLog/wiki/How-to-write-a-custom-layout-renderer
或者在启动时将连接字符串放入NLog-Global-Diagnostic-Context:
https://github.com/NLog/NLog/wiki/Var-Layout-Renderer
也许是这样的, NLog.config
使用${gdc:connectionString}
:
var myConnectionString = Configuration.GetConnectionString("myDb");
NLog.GlobalDiagnosticsContext.Set("connectionString", myConnectionString);
var logFactory = NLogBuilder.ConfigureNLog("NLog.config"); // Uses ${gdc:connectionString}
var logger = logFactory.GetCurrentClassLogger();
logger.Info("Hello World");
另请参见https://github.com/NLog/NLog/wiki/Gdc-Layout-Renderer
更新 - $ {configsetting}
NLog.Extension.Logging ver。 1.4现在支持${configsetting}
因此NLog可以直接从appsettings.json读取设置,而无需使用NLog变量。 请参阅https://github.com/NLog/NLog/wiki/ConfigSetting-Layout-Renderer
所以这就是我在我的项目中尝试过并在控制台上显示日志的内容。
使用nuget安装以下软件包
创建一个名为nlog.config的新文件,并使用以下内容将其添加到项目中。
<?xml version="1.0" encoding="utf-8" ?> <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <extensions> <add assembly="NLog.Web.AspNetCore"/> </extensions> <!-- the targets to write to --> <targets> <!-- write logs to file --> <target name="file" xsi:type="File" fileName="${basedir}/App_Data/Logs/${shortdate}.txt" encoding="utf-8" layout="[${longdate}][${machinename}][${level}] ${message} ${exception}" /> </targets> <!-- rules to map from logger name to target --> <rules> <!--All logs, including from Microsoft--> <logger name="*" minlevel="Trace" writeTo="allfile" /> <!--Skip Microsoft logs and so log only own logs--> <logger name="Microsoft.*" minlevel="Trace" writeTo="blackhole" final="true" /> <logger name="*" minlevel="Trace" writeTo="ownFile-web" /> </rules> </nlog>
{ "Logging": { "IncludeScopes": false, "LogLevel": { "Default":"Trace", "Microsoft": "Warning" } }
using NLog; using NLog.Extensions.Logging; public static IWebHostBuilder CreateWebHostBuilder(string[] args) => WebHost.CreateDefaultBuilder(args) .UseKestrel(options => { // options.Listen(IPAddress.Loopback, 5000); //HTTP port }) .UseContentRoot(Directory.GetCurrentDirectory()) .UseIISIntegration() .ConfigureLogging((hostingContext, logging) => { logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging")); logging.AddConsole(); logging.AddDebug(); logging.AddEventSourceLogger(); // Enable NLog as one of the Logging Provider logging.AddNLog(); }) .UseStartup<Startup>();
注意 :我使用代码片段来插入代码,因为我无法正确格式化当前编辑器中的代码。
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