Please see the sample table.
create table uploadtest
(
id int primary key,
filename varchar(500),
filecontent varbinary(max)
)
I have attached a sample working solution for demo purposes in the below thread.
http://www.c-sharpcorner.com/Forums/Thread/179342/how-to-upload-and-retrieve-files-from-database.aspx
For demo purposes i have set to upload and download one file only.
Also i have used Entity framework, if you are using stored procedures, create a class with the above columns as properties and set the values or directly pass the stored proc content to filename and file content.
You can just upload ur ppt and test how it works