Nlog 无法将日志发送到 Oracle 数据库

Answer 1

我尝试了下面的代码，它运行良好。

在 Nugets 下面你必须包含在项目中

• NLog
• NLog.Database
• NLog.Extension.Logging
• NLog.Web.AspNetCore
• Oracle.ManagedDataAccess.Core

在 appsettings.json 中添加连接字符串信息

nlog.config 文件必须如下（根据您编辑连接字符串和日志文件路径信息）

<?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="Warn"
      internalLogFile="C:\temp\Logs\internal-nlog4txt">
    <extensions>
        <add assembly="NLog.Database"/>
        <add assembly="NLog.Web.AspNetCore"/>
    </extensions>

    <targets>
        <target name="database"
                xsi:type="Database"
                connectionString="${configsetting:item:=ConnectionStrings.your_connectionstring_namefrom_appsettings_json_file}"
                dbProvider="Oracle.ManagedDataAccess.Client.OracleConnection,Oracle.ManagedDataAccess"
                commandText="INSERT INTO APPLICATIONLOG (ACTIONTIME,DETAILS) VALUES (sysdate,:details)"
                commandType="Text">
            <parameter name="details" layout="${message}" />
        </target>
    </targets>
    
    <rules>
        <logger name="*" minlevel="Trace" writeTo="database" />
    </rules>
</nlog>

---

程序.cs

     public class Program
    {
        public static void Main(string[] args)
        {
            var logger = NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();
            try
            {
                //logger.Debug("init main function");
                CreateWebHostBuilder(args).Build().Run();
            }
            catch (Exception ex)
            {
                logger.Error(ex, "Error in init");
                throw;
            }
            finally
            {
                NLog.LogManager.Shutdown();
            }
        }

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.SetMinimumLevel(LogLevel.Information);
                })
                .UseNLog();
    }

---

Startup.cs 类中没有任何内容

在控制器中注入并使用 Logger，如下所示

public class ValuesController : ControllerBase
{
    private readonly ILogger<ValuesController> _logger;

    public ValuesController(ILogger<ValuesController> logger)
    {
        _logger = logger;
    }

    [HttpGet("{id}")]
    public ActionResult<IEnumerable<string>> Get(int id)
    {
        _logger.LogInformation("Start : Getting item details for {ID} ", id);

        List<string> list = new List<string>();

        list.Add("A");
        list.Add("B");

        _logger.LogInformation($"Completed : Item details for  {string.Join(", ", list)}");

        return list;
    }
}

谢谢