Question

我使用log4net.Appender.AdoNetAppender appender 我的log4net表是以下字段[Date],[Thread],[Level],[Logger],[Message],[Exception]

我需要在log4net表中添加另一个字段（例如SalesId），但是如何在我的xml和代码中指定在记录错误或信息消息时记录“SalesId”？

e.g。 log.Info("SomeMessage", SalesId)

这是log4net xml

  <appender name="SalesDBAppender" type="log4net.Appender.AdoNetAppender">
    <bufferSize value="1" />
    <connectionType value ="System.Data.SqlClient.SqlConnection" />
    <connectionString value="Data Source=..." />
    <commandText value="INSERT INTO Log4Net ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception)" />
    <parameter>
      <parameterName value="@log_date" />
      <dbType value="DateTime" />
      <layout type="log4net.Layout.RawTimeStampLayout" />
    </parameter>
    <parameter>
      <parameterName value="@thread" />
      <dbType value="String" />
      <size value="255" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%thread" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@log_level" />
      <dbType value="String" />
      <size value="50" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%level" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@logger" />
      <dbType value="String" />
      <size value="255" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%logger" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@message" />
      <dbType value="String" />
      <size value="4000" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%message" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@exception" />
      <dbType value="String" />
      <size value="2000" />
      <layout type="log4net.Layout.ExceptionLayout" />
    </parameter>
  </appender>

Answer 1

1）修改命令文本：INSERT INTO Log4Net ([Date],[Thread],[Level],[Logger],[Message],[Exception],[MyColumn]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception, @CustomColumn)

2）添加自定义列的参数定义：

<parameter>
   <parameterName value="@CustomColumn"/>
   <dbType value="String" />
   <size value="255" />
   <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%property{CustomColumn}" />
  </layout>
</parameter>

3）然后使用log4net的一个上下文将值传递给参数：

// thread properties...
log4net.LogicalThreadContext.Properties["CustomColumn"] = "Custom value";
log.Info("Message"); 

// ...or global properties
log4net.GlobalContext.Properties["CustomColumn"] = "Custom value";

Answer 2

Log4Net中提供了三种类型的日志上下文。

Log4Net.GlobalContext：-此上下文在所有应用程序线程和域之间共享。如果两个线程在GlobalContext上设置相同属性，则一个值将覆盖另一个值。
Log4Net.ThreadContext：-此上下文范围仅限于调用线程。在这里，两个线程可以将同一属性设置为不同的值，而不会彼此覆盖。
Log4Net.ThreadLogicalContext：-此上下文的行为类似于ThreadContext。如果您使用的是自定义线程池算法或托管CLR，则可能会对此有所帮助。

将以下代码添加到program.cs文件中：

static void Main( string[] args )
{
    log4net.Config.XmlConfigurator.Configure();
    log4net.ThreadContext.Properties[ "myContext" ] = "Logging from Main";
    Log.Info( "this is an info message" );
    Console.ReadLine();
}

2）为自定义列添加参数定义：

  <log4net>      
    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%logger (%property{myContext}) [%level]- %message%newline" />
      </layout>
    </appender> 
  </log4net>

Answer 3

这是一个带有一些个性化偏好的工作版本。我添加了一个自定义列来存储生成的异常代码。

1）将自定义列（此处为exceptionCode）添加到Log4net config：

<commandText value="INSERT INTO Log([Date],[Thread],[Level],[Logger],[Message],[Exception],[ExceptionCode]) 
VALUES (@log_date, @thread, @log_level, @logger, @message, @exception,@exceptionCode)" />

<parameter>
    <parameterName value="@exceptionCode" />
    <dbType value="String" />
    <size value="11" />
    <layout type="Common.Utils.LogHelper.Log4NetExtentedLoggingPatternLayout">
        <conversionPattern value="%exceptionCode{Code}" />
    </layout>
</parameter>

2）Log4NetExtentedLoggingCustomParameters.cs

namespace Common.Utils.LogHelper
{
    public class Log4NetExtentedLoggingCustomParameters
    {
        public string ExceptionCode { get; set; }

        public string Message { get; set; }

        public override string ToString()
        {
            return Message;
        }
    }
}

3）Log4NetExtentedLoggingPatternConverter.cs

namespace Common.Utils.LogHelper
{
    public class Log4NetExtentedLoggingPatternConverter : PatternConverter
    {
        protected override void Convert(TextWriter writer, object state)
        {
            if (state == null)
            {
                writer.Write(SystemInfo.NullText);
                return;
            }

            var loggingEvent = state as LoggingEvent;
            var messageObj = loggingEvent.MessageObject as Log4NetExtentedLoggingCustomParameters;

            if (messageObj == null)
            {
                writer.Write(SystemInfo.NullText);
            }
            else
            {
                switch (this.Option.ToLower()) //this.Option = "Code"
                {
                    case "code": //config conversionPattern parameter -> %exceptionCode{Code}
                        writer.Write(messageObj.ExceptionCode);
                        break;  
                    default:
                        writer.Write(SystemInfo.NullText);
                        break;
                }
            }
        }
    }
}

4）Log4NetExtentedLoggingPatternLayout.cs

namespace Common.Utils.LogHelper
{
    public class Log4NetExtentedLoggingPatternLayout : PatternLayout
    {
        public Log4NetExtentedLoggingPatternLayout()
        {
            var customConverter = new log4net.Util.ConverterInfo()
            {
                Name = "exceptionCode",
                Type = typeof(Log4NetExtentedLoggingPatternConverter)
            };

            AddConverter(customConverter);
        }
    }
}

5）Logger.cs //使用新专栏享受您的记录器！：）

namespace Common.Utils.LogHelper
{
    public class Logger
    {
        static ILog Logger = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

        public static string LogError(string message, Exception exception = null)
        {
            var logWithErrCode = GetLogWithErrorCode(message);
            Logger.Error(logWithErrCode, exception);
            return logWithErrCode.ExceptionCode;
        }

        private static Log4NetExtentedLoggingCustomParameters GetLogWithErrorCode(string message)
        {
            var logWithErrCode = new Log4NetExtentedLoggingCustomParameters();
            logWithErrCode.ExceptionCode = GenerateErrorCode(); //this method is absent for simplicity. Use your own implementation
            logWithErrCode.Message = message;
            return logWithErrCode;
        }
    }
}

的引用：

http://blog.stvjam.es/2014/01/logging-custom-objects-and-fields-with

Log4Net，如何在我的日志记录中添加自定义字段

3 个答案: