How to modify json with WixToolset v3.11

Question

I want to modify values in an existing json file.

When I run my installer I type server name which points to my API. After I typed server name I want to add that value in app settings json file.

Answer 1

http://dotnetbyexample.blogspot.ro/2010/11/wix-configurable-search-replace-custom.html

You need to create a wix project (Custom Action Class Library) create logics, after that you need to use dll in Product.wxs (Installer project) like in example.

PS: if you want to change one property from file, you should have something like this: