Have one log file per process per day by modifying nlog.config file

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1

Hi !
I want to have one log file per day per process.
I would only like to modify in the nlog.config file.

Thus, I am trying to modify the filename of the logs file, but I didn’t succeed…

Steps I tried:
I went to C:\Program Files\UiPath\Studio and modified the file nlog.config
I tried to add several attributes at type File in filename tag.

Like originally the file was:

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <variable name="WorkflowLoggingDirectory" value="${specialfolder:folder=LocalApplicationData}/UiPath/Logs" />
  <rules>
    <logger name="WorkflowLogging" writeTo="WorkflowLogFiles" final="true" />
  </rules>
  <targets>
    <target type="File" name="WorkflowLogFiles" fileName="${WorkflowLoggingDirectory}/${shortdate}_Execution.log" layout="${time} ${level} ${message}" keepFileOpen="true" openFileCacheTimeout="5" concurrentWrites="true" encoding="utf-8" writeBom="true" />
  </targets>
</nlog>

and I modified it as:

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <variable name="WorkflowLoggingDirectory" value="${specialfolder:folder=LocalApplicationData}/UiPath/Logs" />
  <rules>
    <logger name="WorkflowLogging" writeTo="WorkflowLogFiles" final="true" />
  </rules>
  <targets>
    <target type="File" name="WorkflowLogFiles" fileName="${WorkflowLoggingDirectory}/${shortdate}_${processname:fullName=true}_Execution.log" layout="${time} ${level} ${message}" keepFileOpen="true" openFileCacheTimeout="5" concurrentWrites="true" encoding="utf-8" writeBom="true" />
  </targets>
</nlog>

I tried to understand the documentation of https://nlog-project.org/config/?tab=layouts but couldn’t use it properly…

Does someone know how to do it ?

Thanks ! :grin:

2

Hey @Hiba_B

So you mean no matter how many times you run a process you want only one log file ?

Thanks
#nK

3

I mean for example if I have 3 processes and they run monday and tuesday, then
I want to have 6 log files that contain logs of monday process 1, monday process 2, monday process 3, tuesday process 1, tuesday process 2, tuesday process 3

4

Hey @Hiba_B

So that means for every process only one log file per day ?

Thanks
#nK

5

Yes that’s it

6

This needs some bit of research let’s see if I get something.

7

Hello @Hiba_B

Does that mean your process will execute multiple times per daya and you need to retain a single log file per process?

For example Process 1 can execute multiple time a day and you need to retain one log file for that process for the day?

8

Hi @Rahul_Unnikrishnan : Yes

9

You can try the following approach:

1/ set environment variable (e.g. ProcessName) to your process name e.g. using folloving VB code
system.Environment.SetEnvironmentVariable("ProcessName", "MyProcess")

2/ Use the environment variable in the log file name in NLog.config
fileName="${WorkflowLoggingDirectory}/${environment:ProcessName}_${shortdate}_Execution.log"

NOTE: Only after setting the environment variable the log file name will have the expected format. Therefore setting the enviroment variable should be the very first activity in the process.

10

sorry
what should i do for creating a new folder for each day and then creating files in them for every hour?