我的目标是将来自appsettings.json的值注入到ASP.NET Core应用程序的nlog.config中。我正在使用NLog.Web.AspNetCore 4.8.3,NLog 4.6.5,NLog.config 4.6.5和Microsoft.Extensions.Logging.Abstractions 2.0.0。
我无法正常工作。我的印象是,我的appsettings.json文件中的 $ {configsetting:name = ConnectionStrings.ApplicationDatabase} 会被替换为 ConnectionStrings.ApplicationDatabase 值,但这不会工作。 nlog.config变量值保持不变,并且在运行应用程序时会引发错误,因为那是无效的连接字符串。
nlog.config的片段
<!-- Using logDirectory variable to set path to src/logs folder in allfile and ownFile-web targets below -->
<variable name="logDirectory" value="${basedir}/../../../logs/${shortdate}/internal-nlog.log" />
<variable name="logDatabase" value="${configsetting:name=ConnectionStrings.ApplicationDatabase}"/>
<variable name="logDatabaseUser" value="${configsetting:name=DatabaseCredentials.User}"/>
<variable name="logDatabasePassword" value="${configsetting:name=DatabaseCredentials.Password}"/>-->
<variable name="logConnectionString" value="mongodb://${logDatabaseUser}:${logDatabasePassword}@${logDatabase}/myApplicationDB?authSource=admin"/>
<!-- Load the ASP.NET Core plugin -->
<extensions>
<add assembly="NLog.Web.AspNetCore" />
<add assembly="NLog.Mongo" />
</extensions>
<!-- the targets to write to -->
<targets>
<!-- write logs to file -->
<target xsi:type="File" name="allfile" fileName="${logDirectory}"
layout="${longdate}|${event-properties:item=EventId.Id}|${logger}|${uppercase:${level}}|${message} ${exception}" />
<!-- another file log, only own logs. Uses some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="${logDirectory}"
layout="${longdate}|${event-properties:item=EventId.Id}|${logger}|${uppercase:${level}}| ${message} ${exception}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
<target xsi:type="Mongo" name="error-mongo"
connectionString="${logConnectionString}"
collectionName="errorLogs">
<field name="date" layout="${date}" bsonType="DateTime" />
<field name="level" layout="${level}" />
<field name="message" layout="${message}" />
<field name="logger" layout="${logger}" />
<field name="exception" layout="${exception:format=tostring}" />
<field name="threadID" layout="${threadid}" bsonType="Int32" />
<field name="threadName" layout="${threadname}" />
<field name="processID" layout="${processid}" bsonType="Int32" />
<field name="processName" layout="${processname:fullName=true}" />
<field name="userName" layout="${windows-identity}" />
</target>
<target xsi:type="Mongo" name="event-mongo"
connectionString="${logConnectionString}"
collectionName="eventLogs">
<field name="date" layout="${date}" bsonType="DateTime" />
<field name="level" layout="${level}" />
<field name="event" layout="${event-properties:item=EventId.Id}" />
<field name="message" layout="${message}" />
<field name="logger" layout="${logger}" />
</target>
</targets>
appsetting.json的片段
"ConnectionStrings": {
"ApplicationDatabase": "App-db-server-1.com:27017,App-db-server-2.com:27017,App-db-server-3.com:27017/AccessManagement?ssl=true&replicaSet=myReplicaSet&authSource=admin"
},
"DatabaseCredentials": {
"User": "",
"Password": ""
}
}
startup.cs代码段
// 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)
{
if (env.IsDevelopment())
app.UseDeveloperExceptionPage();
ConfigureNLog(app, loggerFactory);
/*These settings need to be changed*/
app.UseCors(
options => options
.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader()
);
app.UseAuthentication();
//Swagger Set Up
app.UseSwagger();
app.UseSwaggerUI(c =>
{
c.SwaggerEndpoint("/swagger/v1/swagger.json", "Authentication API V1");
});
app.UseMvc();
}
private static void ConfigureNLog(IApplicationBuilder app, ILoggerFactory loggerFactory)
{
IConfigurationRoot config = new ConfigurationBuilder()
.AddJsonFile(path: "appSettings.json").Build();
NLog.Extensions.Logging.ConfigSettingLayoutRenderer.DefaultConfiguration = config;
}
** Program.cs的代码段
public class Program
{
public static void Main(string[] args)
{
BuildWebHost(args).Run();
}
public static IWebHost BuildWebHost(string[] args)
{
return WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.ConfigureLogging(logging =>
{
logging.ClearProviders();
logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
})
.UseNLog()
.Build();
}
}
答案 0 :(得分:0)
来自https://github.com/NLog/NLog/wiki/ConfigSetting-Layout-Renderer
从UseNLog()
或NLog.Web.AspNetCore
调用NLog.Extensions.Hosting
时,它将自动向ConfigSettingLayoutRenderer
注册托管环境配置。
要向IConfiguration
手动注册Microsoft扩展${configsetting}
:
IConfigurationRoot config = new ConfigurationBuilder()
.AddJsonFile(path: "AppSettings.json").Build();
NLog.Extensions.Logging.ConfigSettingLayoutRenderer.DefaultConfiguration = config;
更新,此处为演示案例https://github.com/304NotModified/NLog-Demo-cases/tree/master/AspNetCore2WithConfigSetting