log4net - Log4Net 数据库存储 - 所有字段都包含消息值

Question

我使用 AdoNetAppender 激活 log4net 以将日志存储在 Sql Server 数据库中。

执行后，我看到所有参数（日期时间除外）都填满了消息值。

我确实在代码中自己创建了适配器（没有 xml 配置），所以我假设我可能忘记调用一种方法来使模式映射工作？

    var root = ((Hierarchy)LogManager.GetRepository()).Root;

    root.AddAppender(this.CreateDBAppender());
    root.Repository.Configured = true;

    this.log = LogManager.GetLogger("MyLogger");



private IAppender CreateDBAppender()
{
    ...
    RawLayoutConverter layoutConverter = new RawLayoutConverter();

    var databaseAppender = new AdoNetAppender
    {
        Name = "MyLogger",
        ConnectionString = "...",
        CommandText = @"INSERT INTO [Log] ([DateTime], [Exception], [Host], [Level], [Logger], [Message], [Severity], [Thread]) 
                                        VALUES (@logdate, @exception, @host, @level, @logger, @message, @severity, @thread)",
        CommandType = System.Data.CommandType.Text,
        ConnectionType = "System.Data.SqlClient.SqlConnection"
    };

    databaseAppender.AddParameter(new AdoNetAppenderParameter
        {
            ParameterName = "@logdate",
            DbType = System.Data.DbType.DateTime,
            Layout = new RawTimeStampLayout()
        });

    databaseAppender.AddParameter(new AdoNetAppenderParameter
    {
        ParameterName = "@message",
        DbType = System.Data.DbType.String,
        Size = 4000,
        Layout = (IRawLayout)layoutConverter.ConvertFrom(new PatternLayout
        {
            ConversionPattern = "%m"
        })
    });

    databaseAppender.AddParameter(new AdoNetAppenderParameter
        {
            ParameterName = "@host",
            DbType = System.Data.DbType.String,
            Size = 50,
            Layout = (IRawLayout)layoutConverter.ConvertFrom(new PatternLayout
                {
                    ConversionPattern = "%property{host}"
                })
        });

    databaseAppender.AddParameter(new AdoNetAppenderParameter
        {
            ParameterName = "@level",
            DbType = System.Data.DbType.String,
            Size = 50,
            Layout = (IRawLayout)layoutConverter.ConvertFrom(new PatternLayout
                {
                    ConversionPattern = "%level"
                })
        });

    //// more parameters ...

    databaseAppender.ActivateOptions();
    return databaseAppender;
}

Answer 1

我弄清楚是怎么回事。我总是收到消息的原因是因为它使用了 PatternLayout 类中配置的默认 ConversionPattern

public const string DefaultConversionPattern = "%message%newline";

看起来在代码中设置 ConversionPattern 属性没有任何影响。您需要通过 PatternLayout 类的构造函数提供模式。

    databaseAppender.AddParameter(new AdoNetAppenderParameter
        {
            ParameterName = "@level",
            DbType = System.Data.DbType.String,
            Size = 50,
            Layout = (IRawLayout)layoutConverter.ConvertFrom(new PatternLayout("%-5p"))
        });