Viewing a document in Zoho Viewer

Viewing a document in Zoho Viewer

Hi to all
My requirement is Intigrate Zoho Remote API(Viewer) to my .Net application.
My scenario is like this. All uploaded documents will be stored in file repository on our server machine. These documents will be shown to user in a grid. When user click on any document, that particular document should open in Zoho Remote API(Viewer) to do further modifications in same browser tab.
Can any one please guide me to do this task. I didn't understand how to send file content. Thanks in advance.