NLog documentation is currently being re-organized to use the wiki format. Some content is still missing or incomplete.
We need volunteers to help maintain and organize this Wiki. Please contact Jarek if you are interested in helping out.

Matches when the calculated layout contains the specified substring. This filter is deprecated in favour of <when /> which is based on contitions. 

Supported in

Configuration Syntax

Read more about using the Configuration File.

Parameters

• Filtering Options
• layout - Layout to be used to filter log messages.Layout Required.
• substring - Substring to be matched. Required.
• action - Action to be taken when filter matches. Required.
  Possible values:
  • Ignore - The message should not be logged.
  • IgnoreFinal - The message should not be logged and processing should be finished.
  • Log - The message should be logged.
  • LogFinal - The message should be logged and processing should be finished.
  • Neutral - The filter doesn't want to decide whether to log or discard the message.
• ignoreCase - Indicates whether to ignore case when comparing strings.Boolean Default: False