Using log4net
Seq works best with richly-structured event data like that produced by Serilog, ASP.NET Core and NLog 4.5+.
If you currently use log4net however, you're not left out; we provide a log4net appender that writes events to Seq via HTTP.
Installing the Appender
At the time of writing, the Seq appender for log4net supports .NET 4+.
At the Visual Studio Package Manager console, type:
PM> Install-Package Seq.Client.Log4Net
This will add the required assemblies to the project.
Then, add the appender to your log4net configuration:
<appender name="SeqAppender" type="Seq.Client.Log4Net.SeqAppender, Seq.Client.Log4Net" >
<bufferSize value="1" />
<serverUrl value="http://my-seq" />
</appender>
Set the serverUrl
value to the address of your Seq server.
Note the buffer size of 1; the appender supports buffering for better performance if required.
Finally, add a reference to the appender in the appropriate configuration section:
<root>
<level value="INFO" />
<appender-ref ref="SeqAppender" />
</root>
Writing events
That's it! When you write log events to your log4net ILogger
:
log.InfoFormat("Hello, {0}, from log4net!", Environment.UserName);
They'll appear beautifully in Seq.
Updated over 6 years ago