asp.net core 日誌
阿新 • • 發佈:2018-12-04
警告 https -c extension art img tco emp ica file.
ASP.NET Core 中的日誌記錄
https://docs.microsoft.com/zh-cn/aspnet/core/fundamentals/logging/?view=aspnetcore-2.1
日誌級別:Trace -》Debug-》 Information -》Warning-》 Error-》 Critical
級別包含範圍由大到小 ,如 Trace 就包含了所有信息。
基礎用法
public class HomeController : Controller { private readonly ILogger _logger; public HomeController(ILogger<HomeController> logger) { _logger = logger; } public IActionResult Index() { _logger.LogInformation("你訪問了首頁"); _logger.LogWarning("警告信息"); _logger.LogError("錯誤信息"); return View(); } }
日誌事件 ID
public class LoggingEvents { public const int GenerateItems = 1000; public const int ListItems = 1001; public const int GetItem = 1002; public const int InsertItem = 1003; public const int UpdateItem = 1004; public const int DeleteItem = 1005; public const int GetItemNotFound = 4000; public const int UpdateItemNotFound = 4001; }
_logger.LogWarning(LoggingEvents.GetItemNotFound, "GetById({ID}) NOT FOUND", 100);
結果:
warn: TodoApi.Controllers.TodoController[4000]
GetById(100) NOT FOUND
NLog 輸出到文件
https://github.com/NLog/NLog.web/wiki
asp.net core 2
https://github.com/NLog/NLog.Web/wiki/Getting-started-with-ASP.NET-Core-2
Create a nlog.config
<?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="c:\temp\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="c:\temp\nlog-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- another file log, only own logs. Uses some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-own-${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" />
</rules>
</nlog>
復制到輸出目錄:始終復制
Update program.cs
這裏 nlog-all-.log 是記錄所有日誌,nlog-own-.log 記錄跳過Microsoft 開頭的類庫輸出的相關信息,剩下的信息。
參考:https://www.cnblogs.com/linezero/p/Logging.html
asp.net core 日誌