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使用NLog和运行时参数记录到数据库

[英]Logging with NLog and runtime parameters to Database

我试图用NLog将一些信息记录到数据库,但我只能在运行时检索一些数据库参数。 尝试了一些解决方案,但没有成功。 有我的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">

  <variable name="sqlDate" value="[${date:format=yyyy-MM-dd HH\:mm\:ss\.fff}]"/>

  <targets>
    <target name="dataBase"
        xsi:type="Database"
        dbProvider="System.Data.SqlClient"
        connectionString="${gdc:item=myConnectionstring}"
        dbDatabase="${gdc:item=myDataBase}">
      <commandText>
        INSERT INTO [TABLE_NAME]([COL1], [COL2] )
        VALUES(@val1, @val2)
      </commandText>
      <parameter name="@val1" layout="${event-context:item=val1}"/>
      <parameter name="@val2" layout="${event-context:item=val2}"/>
    </target>
  </targets>

  <rules>
    <logger name="_dataBase" levels="Info" writeTo="dataBase" final="true" />
  </rules>
</nlog>

还有我的.NET C#代码:

public static class Log
{
    private static NLog.Logger _logger = NLog.LogManager.GetCurrentClassLogger();
    private static Config _config = LoadConfig();

    public static void Info(string val1, string val2)
    {
        DatabaseTarget databaseTarget = (NLog.Targets.DatabaseTarget)NLog.LogManager.Configuration.FindTargetByName("dataBase");
        databaseTarget.ConnectionString = _config.ConnectString;
        databaseTarget.DBDatabase = _config.DBName;
        NLog.LogManager.ReconfigExistingLoggers();

        LogEventInfo info = new LogEventInfo(LogLevel.Info, "_dataBase", "Test_message");
        info.Properties["val1"] = val1;
        info.Properties["val2"] = val2;

        _logger.Log(info);
    }
}

它只是什么都不做:没有崩溃,没有向DB写任何数据。 这是我的内部NLog日志: http//pastebin.com/0tLi9zJ1
我怎样才能解决这个问题?

PS对不起,我上次尝试提出这个问题,看起来我忘了提供一些必要的信息。

所以,工作代码是:

<?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">

  <variable name="sqlDate" value="${date:format=yyyy-MM-dd HH\:mm\:ss\.fff}"/>

  <targets>
    <target name="dataBase"
        xsi:type="Database"
        dbProvider="System.Data.SqlClient"
        connectionString="${gdc:item=myConnectionString}"
        dbDatabase="${gdc:item=myDataBase}">
      <commandText>
        INSERT INTO [TABLE_NAME]([COL1], [COL2] )
        VALUES(@val1, @val2)
      </commandText>
      <parameter name="@val1" layout="${event-context:item=val1}"/>
      <parameter name="@val2" layout="${event-context:item=val2}"/>
    </target>
  </targets>

  <rules>
    <logger name="_dataBase" levels="Info" writeTo="dataBase" final="true" />
  </rules>
</nlog>
public static class Log
{
    private static Config _config = LoadConfig();

    public static void Info(string val1, string val2)
    {
          NLog.Logger logger = NLog.LogManager.GetLogger("_dataBase");

          GlobalDiagnosticsContext.Set("myConnectionString", _config.ConnectString);
          GlobalDiagnosticsContext.Set("myDataBase", _config.DBName);

          LogEventInfo info = new LogEventInfo(LogLevel.Info, "_dataBase", "Test_message");
          info.Properties["val1"] = val1;
          info.Properties["val2"] = val2;

          logger.Log(info);
    }
}

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