i am developing an excel add-ins using office.js, i want to keep the different configuration settings in the web.config files, and read those settings in the java-script file. how to do that.
is office add-in sample project is MVC asp.net project, should i be returning the view from there and my source location in manifest point to that view.
please guide me to correct approach.
Generally speaking, this is not something that is Office Add-in specific. You would you would use the same approach as with a regular website. For example, see Reading web.config from JavaScript.
In terms of the manifest start URL, you can point it at any web-browsable page, it doesn't have to end with .html. So you can use an aspx or MVC view page. Alternatively, you can have an html/js/css page that makes an AJAX web service call to your own web API that returns you the settings. If I may recommend, see my blog post for how to create a web service for an Office Add-in using the ASP.NET Web API.
Hope this helps!
~ Michael Zlatkovsky, developer on Office Extensibility team, MSFT