我想为NLOG文件的自定义文件名。我该怎么做？例如，当发生了错误，我产生用于用户的唯一编号，然后显影剂可以计算出发生错误的位置。我想按照这个号码记录错误有一个文件名。
public static class ExceptionMiddlewareExtensions
{
public static void ConfigureExceptionHandler(this IApplicationBuilder app, ILoggerManager logger)
{
app.UseExceptionHandler(appError =>
{
appError.Run(async context =>
{
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
context.Response.ContentType = "application/json";
var contextFeature = context.Features.Get<IExceptionHandlerFeature>();
if (contextFeature != null)
{
//var RequestId = Activity.Current?.Id ?? System.Web.HttpContext.Current.TraceIdentifier; ??? I want to use this string as file name
logger.LogError($"Something went wrong: {contextFeature.Error}");
context.Response.Redirect("/Home/Error");
await context.Response.WriteAsync(new ErrorDetails()
{
StatusCode = context.Response.StatusCode,
Message = "Internal Server Error."
}.ToString());
}
});
});
}
}
NLog.config文件：
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
internalLogLevel="info"
internalLogFile="${basedir}\log\internal-nlog.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- write logs to file -->
<target xsi:type="File" name="allfile" fileName="${basedir}\log\all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- another file log, only own logs. Uses some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="${basedir}\log\feportal-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
<target xsi:type="File" name="ownFile-web-splited" fileName="${basedir}\log\feportal-${level}-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxLevel="Info" final="true" />
<!-- BlackHole without writeTo -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
<logger name="*" minlevel="Trace" writeTo="ownFile-web-splited" />
</rules>
</nlog>
有多种方式的确，一个选择是使用该事件性质和结构化记录（4.5+ NLOG）
logger.LogError("Something went wrong: {Error}. Id: {UniqueId}", contextFeature.Error, myUniqueId);
而在配置：
<target xsi:type="File"
name="file1"
fileName="${basedir}\log\error-{event-properties:UniqueId}.log"
... />
也可以看看