How to edit and save the connectionstring in web.config file during the installation in c#?

Question

• i have created installer for the web application.
• i want to change the default connectionstring value in web.config by the connectionstring passed by the user from the installation.

Answer 1

A simple way might be to simply Read in the web.config and do a string replace, then write out the web.config again:

eg: in web.config containing:

...
<add name="Application" connectionString="SETUP_CONNECTION_STRING" />
...

replace SETUP_CONNECTION_STRING with actual string:

This assumes its done on initial setup where multiple settings could be set without the need to use the Configuration classes etc.