How to manage documents stored in SQL-Server from a MVC.Net application?

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C#

SQL-Server

MVC

For the project I'm currently developing, there's a requirement for storing documents (mainly Office documents) in the SQL-Server database.

To create a new document: The user selects a template among those offered by the server. Then the user can edit some data.

To update: The user can select a document previously saved, and then can edit it. This is actually similar to the creation process. The difference is opening a template for the former case, and opening an proviously-stored document in this case.

To save: Once the user saves the document, the browser notices the event and automatically sends the edited document to the server in order to be saved into the database.

I know the user can select the document, and automatically open whenever the browser/OS is configured to open the incoming document-type properly. So, the challenge is to store it (that means, to be sent to the server) automatically once the user saves it.

The FileUpload control is not valid for my case, since the user must interact with it, and the sending process must be transparent for the user.

So, is there any library intended for a similar purpouse?

Thanks in advance.