ASP.NET Core 5.0 nlog 实现不起作用

Posted 2023-04-12

【中文标题】ASP.NET Core 5.0 nlog 实现不起作用

【英文标题】：ASP.NET Core 5.0 nlog implementation not working

【发布时间】：2021-12-11 18:38:39

【问题描述】：

我正在开发一个我想记录异常但它不起作用的应用程序。我想记录的错误基本上是关于 validateToken 我想知道我得到了什么异常。这是我的实现，我添加了用于 nLog 的所有代码。

程序.cs

public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args).UseNLog()
            .ConfigureLogging((hostingContext, logging) =>
            
                // Remove all the default logging providers
                logging.ClearProviders();
                logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
                logging.AddNLog().SetMinimumLevel(LogLevel.Error);
            )
                .ConfigureWebHostDefaults(webBuilder =>
                
                    webBuilder.UseStartup<Startup>();
                );

这是nlog.config文件的截图：

appSetting.json 设置文件：

"NLogConnection": 
    "DbProvider": "sqlserver",
    "DbHost": "SQL5103.site4now.net",
    "Database": "db_a7b629_testdatabase",
    "User": "db_a7b629_testdatabase_admin",
    "Password": "Ad*******"
  ,

这是我要记录异常的地方

public class UserProfileInfo : IUserProfileInfo

    private readonly IHttpNetClientService _apiService;
    protected readonly IOptions<AppSettingDTO.AppSettingDTO> _appSetting;
    private readonly ILogger<UserProfileInfo> _logger;

    public UserProfileInfo(ILogger<UserProfileInfo> logger, IHttpNetClientService HttpClient, IOptions<AppSettingDTO.AppSettingDTO> AppSettings)
    
        _apiService = HttpClient;
        _appSetting = AppSettings;
        this._logger = logger;
    
    
    public bool ValidateToken(string token)
    
        var tokenHandler = new JwtSecurityTokenHandler();

        try
        
            tokenHandler.ValidateToken(token, new TokenValidationParameters
            
                ValidateIssuerSigningKey = true,
                ValidateIssuer = true,
                ValidateAudience = false,
                ValidateLifetime = true,
                ValidIssuer = _appSetting.Value.Jwt.Issuer,
                ValidAudience = _appSetting.Value.Jwt.Audience,
                IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_appSetting.Value.Jwt.Key)),
                ClockSkew = TimeSpan.Zero
            , out SecurityToken validatedToken);
        
        catch (Exception ex)
        
            // this where I want to log an exception but it is not working .. and always log me an error in the txt file generated in c:\temp folder 
            this._logger.LogError($"---- Token Error ----", ex.Message);
            return false;
        

        return true;
    

txt 文件中的错误日志

2021-10-26 13:38:28.8797 Info Message Template Auto Format enabled
2021-10-26 13:38:28.8797 Info Loading assembly: NLog.Web.AspNetCore
2021-10-26 13:38:28.9069 Info Adding target DatabaseTarget(Name=database)
2021-10-26 13:38:28.9335 Info Validating config: TargetNames=database, ConfigItems=33, FilePath=C:\Kamran  Don't Delete\SAUFIK\Project Files\GMD\GMDAPI\GMDApi\bin\Debug\net5.0\NLog.config
2021-10-26 13:38:28.9582 Info Configuration initialized.
2021-10-26 13:38:28.9582 Info NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c. File version: 4.7.9.12899. Product version: 4.7.9+e8712e62842e2d74d60fdf37cf74d743750e5ca2. GlobalAssemblyCache: False

当出现异常但数据库中没有任何内容时，上面的错误是登录到默认的 txt 文件，我不知道可能是我的 UserProfileinfo 类有问题。

【参考方案1】：

记录规则决定记录器输出应该写在哪里。您的日志记录规则说只有名称为 database 的记录器才应该写入 database-target：

<rules>
   <logger name="database" minlevel="error" writeto="database" />
</rules>

但在您的代码中，您使用的是ILogger<UserProfileInfo>，它的记录器名称将基于typeof(UserProfileInfo).Name。

如果您只想让所有错误都独立于记录器名称，那么只需使用*-wildcard：

<rules>
   <logger name="*" minlevel="error" writeto="database" />
</rules>

另请参阅：https://github.com/NLog/NLog/wiki/Tutorial

另见：https://github.com/nlog/NLog/wiki/Configuration-file#rules

另见：https://github.com/NLog/NLog.Extensions.Logging/wiki/NLog-GetCurrentClassLogger-and-Microsoft-ILogger