How do I change an web.config setting using transformation syntax?

Question

I have a value stored in my web.config file that I would like to change when the site is published. I want to change it from TEST to LIVE.

<appSettings>     <add key="RequestMode" value="TEST" />     // other keys here </appSettings> 

Is this possible using web.config transformation syntax? If so, how?

Thanks.

Answer 1

Yes this is possible with transformation syntax. This transformation should do the trick:

<?xml version="1.0" encoding="utf-8"?> <configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">   <appSettings>     <add key="RequestMode" value="LIVE" xdt:Transform="SetAttributes" xdt:Locator="Match(key)"/>   </appSettings> </configuration>