log4net feature

   Feature 

   1  Output to multiple logging targets       can output database , file ,udp ect.

2     Hierarchical logging architecture    can specify which compont output log.   use logger node

3   XML Configuration

4  .    Dynamic Configuration     watch=true

 

1. <log4net>
2. <!-- A1 is set to be a ConsoleAppender -->
3. <appender name="A1" type="log4net.Appender.ConsoleAppender">
4.  <!--  filter by define some filter   -->
5. 1. <filter type="log4net.Filter.StringMatchFilter">
   2. <stringToMatch value="database"/>
   3. </filter>
   4. <filter type="log4net.Filter.StringMatchFilter">
   5. <stringToMatch value="ldap"/>
   6. </filter>
   7. 1. <filter type="log4net.Filter.LevelRangeFilter">
      2. <levelMin value="INFO" />
      3. <levelMax value="FATAL" />
      4. </filter>
6. <!-- A1 uses PatternLayout -->
7. <layout type="log4net.Layout.PatternLayout">
8. <!-- Print the date in ISO 8601 format -->
9. <conversionPattern value="%date [%thread] %-5level %logger %ndc - %message%newline" />
10. </layout>
11. </appender>
13. <!-- Set root logger level to DEBUG and its only appender to A1 -->
14. <root>
15. <level value="DEBUG" />         <!--  ALL    DEBUG     INFO    WARN   ERROR     FATAL      OFF   -->
16. <appender-ref ref="A1" />   <!--  can specify multple appender -->
17. </root>
19. <!-- Print only messages of level WARN or above in the package Com.Foo -->
20. <logger name="Com.Foo">
21. <level value="WARN" /> 
22. </logger>
23. </log4net>