How To Open and Read an Excel Spreadsheet into web browser

Question

hi

 

I am developing a web application in C#.net. I need to edit a file placed on the server in
browser it self(Without downloading it on local machine) and when I save that file, the changes
should be reflected in file. For this I want to use google API but I don't know how can I use
this. I want to do like below.

a).When I click on file name, it should open in browser.
b).When clicked on edit, it open in edit mode in browser using google doc.
c).When I save that file, the changes should be reflected in my file which is placed on
company server (or dummy folder as server in application).

How can I do all this thing with google doc API?