将调试信息和错误信息放入两个不同的日志文件 (Log4net)

Question

我正在使用 NHibernate 和 log4net。这是我的错误日志文件的快照，使用的是我软件的发布版本：

INFO 2009-04-28 03:07:06 - processing cascade NHibernate.Engine.CascadingAction+SaveUpdateCascadingAction for: bpojob.Generated.BusinessObjects.Job
INFO 2009-04-28 03:07:06 - cascade NHibernate.Engine.CascadingAction+SaveUpdateCascadingAction for collection: bpojob.Generated.BusinessObjects.Job.JobItems
DEBUG2009-04-28 03:07:06 - cascading to saveOrUpdate: bpojob.Generated.BusinessObjects.JobItem
DEBUG2009-04-28 03:07:06 - unsaved-value: 0
DEBUG2009-04-28 03:07:06 - transient instance of: bpojob.Generated.BusinessObjects.JobItem
DEBUG2009-04-28 03:07:06 - saving transient instance
DEBUG2009-04-28 03:07:06 - saving [bpojob.Generated.BusinessObjects.JobItem#<null>]
DEBUG2009-04-28 03:07:06 - executing insertions
DEBUG2009-04-28 03:07:06 - executing identity-insert immediately
DEBUG2009-04-28 03:07:06 - Inserting entity: bpojob.Generated.BusinessObjects.JobItem (native id)
DEBUG2009-04-28 03:07:06 - Opened new IDbCommand, open IDbCommands: 1
DEBUG2009-04-28 03:07:06 - Building an IDbCommand object for the SqlString: INSERT INTO job_items (FileName, Job_Id, Status) VALUES (?, ?, ?)
DEBUG2009-04-28 03:07:06 - Dehydrating entity: [bpojob.Generated.BusinessObjects.JobItem#<null>]
DEBUG2009-04-28 03:07:06 - binding 'Blue hills.jpg' to parameter: 0
DEBUG2009-04-28 03:07:06 - binding '8' to parameter: 1
DEBUG2009-04-28 03:07:06 - binding '1' to parameter: 2
DEBUG2009-04-28 03:07:06 - INSERT INTO job_items (FileName, Job_Id, Status) VALUES (?p0, ?p1, ?p2); ?p0 = 'Blue hills.jpg', ?p1 = '8', ?p2 = '1'
DEBUG2009-04-28 03:07:06 - Obtaining IDbConnection from Driver
DEBUG2009-04-28 03:07:06 - Closed IDbCommand, open IDbCommands: 0
DEBUG2009-04-28 03:07:06 - aggressively releasing database connection
DEBUG2009-04-28 03:07:06 - Closing connection
DEBUG2009-04-28 03:07:06 - could not insert: [bpojob.Generated.BusinessObjects.JobItem]
[ INSERT INTO job_items (FileName, Job_Id, Status) VALUES (?p0, ?p1, ?p2) ]

MySql.Data.MySqlClient.MySqlException: Duplicate entry 'Blue hills.jpg' for key 'Unique'
   at MySql.Data.MySqlClient.MySqlStream.ReadPacket()
   at MySql.Data.MySqlClient.NativeDriver.ReadResult(UInt64& affectedRows, Int64& lastInsertId)
   at MySql.Data.MySqlClient.MySqlDataReader.GetResultSet()
   at MySql.Data.MySqlClient.MySqlDataReader.NextResult()
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader()
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery()
   at NHibernate.AdoNet.AbstractBatcher.ExecuteNonQuery(IDbCommand cmd)
   at NHibernate.Id.Insert.AbstractSelectingDelegate.PerformInsert(SqlCommandInfo insertSQL, ISessionImplementor session, IBinder binder)

如您所见，所有info,debug和exception都拼凑在一起，因此一旦出现错误，就很难筛选文件并查找信息。

我想将所有异常信息放入一个文件中，并将其他信息放入另一个文件中。而我要排除的调试信息是发布模式。这该怎么做？

Answer 1

在下面的代码中，我使用了两个使用两个 appender 的日志文件（一个用于调试，另一个用于致命）

<log4net>
<appender name="FatalErrorLog" type="log4net.Appender.RollingFileAppender">
  <file value="C:\temp\Host.log" />
  <appendToFile value="true" />
  <maximumFileSize value="10MB" />
  <maxSizeRollBackups value="50" />
  <rollingStyle value="Size" />
  <layout type="log4net.Layout.PatternLayout">
     <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
  </layout>
  <filter type="log4net.Filter.LevelRangeFilter">
     <levelMin value="ERROR" />
     <levelMax value="FATAL" />
  </filter>
</appender>

<appender name="DebugLog" type="log4net.Appender.RollingFileAppender">
<file value="C:\temp\HostDebug.log" />
<appendToFile value="true" />
<maximumFileSize value="10MB" />
<maxSizeRollBackups value="50" />
<rollingStyle value="Size" />
<layout type="log4net.Layout.PatternLayout">
  <conversionPattern value="%identity------%username------%date [%thread] %-5level %logger - %message%newline" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
  <levelMin value="DEBUG" />
  <levelMax value="ERROR" />
</filter>
</appender>
</log4net>