Log4Net，如何在日志中添加自定义字段
Log4Net，如何在日志中添加自定义字段
提问于 2012-08-27 17:36:00
我使用log4net.Appender.AdoNetAppender附加器。
我的log4net表包含以下字段[Date],[Thread],[Level],[Logger],[Message],[Exception]
我需要向log4net表添加另一个字段(例如SalesId)，但是当记录错误或信息消息时，如何在我的xml和代码中指定记录"SalesId“？
例如log.Info("SomeMessage", SalesId)
下面是log4net的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>回答 2
Stack Overflow用户
回答已采纳
发布于 2012-08-27 18:27:12
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的上下文之一将值传递给参数：
// thread properties...
log4net.LogicalThreadContext.Properties["CustomColumn"] = "Custom value";
log.Info("Message");
// ...or global properties
log4net.GlobalContext.Properties["CustomColumn"] = "Custom value";Stack Overflow用户
发布于 2018-05-25 15:33:11
这是一个带有一些个性化首选项的工作版本。我添加了一个自定义列，用于存储生成的异常代码。
1)将您的自定义列(此处为exceptionCode)添加到Log4net配置中：
<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 //用新的专栏享受你的记录器吧！:)
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;
}
}
}参考文献：
http://blog.stvjam.es/2014/01/logging-custom-objects-and-fields-with
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12139486
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