Reputation: 3448
I have a program in C# and use the log4net library for logging.
I am trying to log the program start time in each line of log in the entire program:
class MyProgram
{
static DateTime startTime;
static void Main()
{
startTime = DateTime.Now;
Log.Info(startTime + "Program started");
MyMethod1();
//...
}
static void MyMethod1()
{
Log.Info(startTime + "method1 step1 ");
//code
Log.Info(startTime + "method1 step2");
}
}
log4net configuaration
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="C:\Logs\\Job.json" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maximumFileSize value="20MB" />
<maxSizeRollBackups value="10" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.SerializedLayout, log4net.Ext.Json">
<decorator type="log4net.Layout.Decorators.StandardTypesDecorator, log4net.Ext.Json" />
<member value="startTime:%property{ApplicationStartTime}"/>
<member value="date:date" />
<member value="level:level" />
<member value="logger:logger" />
<member value="message:messageObject" />
<member value="exception:exception" />
</layout>
</appender>
Instead of appending it manually to each line, can I configure log4net to add the start time of the program to each log line automatically?
Upvotes: 2
Views: 454
Reputation: 3853
You can use log4net.GlobalContext
to set global properties. like this:
static void Main()
{
log4net.GlobalContext.Properties["ApplicationStartTime"] = DateTime.Now;
(...)
and then access it like this in your log configuration
%property{ApplicationStartTime}
Here is some more reading, here is a similar question.
For log4net.Ext.Json
, you can refer to custom properties in this manner:
<!-- json property named after custom property -->
<member value="ApplicationStartTime"/>
<!-- json property with explicit name -->
<member value="startTime:ApplicationStartTime"/>
Upvotes: 5
Reputation: 8703
Create a method wrapper around the log4net log method, that takes a message and forwards it to the log4net log method, but prepends the startTime
to it for you.
var startTime = DateTime.Now.ToString();
void Log(string message)
{
Log.Info($"{startTime}: {message}");
}
Alternatively you can create an extension method:
public static class LoggerExtensions
{
public static void LogWithStartTime(this Logger self, string message)
{
var startTime = Global.GetStartTime();
self.Log($"{startTime}: ${message}");
}
}
Upvotes: 4