Web.config variable update not working with Azure DevOps pipeline (File Transform)

Question

I'm trying to use the task "File Transform" within my pipeline to modify a few values inside my web.config file during deployment.

I created the tasks as the following:

And in the pipeline, inside the variables, I set up the key & value that I want to replace in the XML file.

Everything seems to go fine, however, when I check the log, I see this

So, the file was simple skipped and the transformation didn't work.

The variable that I'm trying to modify in the web.config file has the following path inside the XML file

  <aspNetCore>
   <environmentVariables>
     <environmentVariable  name="x" value="y" />
    </environmentVariables>
   </aspNetCore>
 </configuration>

I read the documentation multiples times, but it's not clear if I'm doing something wrong.

Please, could you provide some suggestion of what I need to check to make it work?

Thank you

You can try to use replace token task or PowerShell scripts to make it work. You can refer to my samples:replace token task and PowerShell scripts — Walter
Glad to know your issue has been resolved. Please mark your answer. This will make it easier for people who have the same question to find answers. — Walter

Walter Walter · Accepted Answer · 2021-02-19T06:52:51

According to the document about XML variable substitution:Variable substitution takes effect only on the applicationSettings, appSettings, connectionStrings, and configSections elements of configuration files. It does not apply to your environmentVariable element. It worked well on my side when I change value in appSettings element.

Please refer to the samples in the document about file transform.

Web.config variable update not working with Azure DevOps pipeline (File Transform)

2 Answers