recommended way to handle this case in .NET for web application

I am relatively new to web development and am trying to figure out what would be the recommended way to deal with my current situation.

All of this needs to be in the .NET framework.This is a very simple use case, but I am required to deal with a bigger problem here.

Here is the flow of things:

• Client clicks a button on a page: "Calculate Sum"
• This invokes a call to the webservice which calculates the sum and returns some extra info on how to render it on the html page
• The client receives this info from the webservice and populates one of the variables in the javascript that is used in the resulting page and the extra info is used to render the html page
• The resulting page would have a button; when clicked would redirect to a third party application. It would then process this request and send a POST back to one the URLs I have specified. I am then required to consume the info (string) that they would send back.

Let me know if I am not clear in any of this and if you want me to specify more info. This is more about learning on the job and so I am trying to find out the best way to sol开发者_StackOverflow社区ve this problem.

Thanks

It sounds like, if as you say everything must be in .NET framework, then you can use Visual Studios to develop this project in VB or C#. Essentially, the page that initially sends the request to the web service would be built as a .aspx webpage. Then you can build a web service in C# or VB .asmx which handles the calculation, returns a result that is parsed by javascript on another asp.net web page and produces a button to send the gathered data as a POST to another URL.