JsonLogViewer

Simple viewer for JSON-based logs in WPF. Currently supports one JSON object per line in file. Will support different layouts later on.

The JSON log can come from any kind of log library.

log4net Configuration

Here is a sample of a log4net rolling file appender using a JSON output format. It requires the log4net.Ext.Json extension.

<appender name="RollingFileJson" type="log4net.Appender.RollingFileAppender">
  <filter type="log4net.Filter.LoggerMatchFilter">
    <loggerToMatch value="MyNamespace.Core.DebugLog" />
    <acceptOnMatch value="false" />
  </filter>
  <file value="lastrun.json.log"/>
  <appendToFile value="false"/>
  <rollingStyle value="Size"/>
  <maxSizeRollBackups value="5"/>
  <maximumFileSize value="10MB"/>
  <layout type="log4net.Layout.SerializedLayout, log4net.Ext.Json">
    <decorator type="log4net.Ext.Json.Serializers.Newtonsoft.NewtonsoftDecorator, log4net.Ext.Json.Serializers.Newtonsoft" />
    <renderer type="log4net.ObjectRenderer.JsonObjectRenderer, log4net.Ext.Json">
      <factory type="log4net.Ext.Json.Serializers.Newtonsoft.NewtonsoftFactory, log4net.Ext.Json.Serializers.Newtonsoft" />
    </renderer>
    <default />
    <remove value="ndc" />
    <remove value="appname" />
    <!--
    <remove value="message" />
    <member value="message:messageobject" />
    -->
  </layout>
</appender>