Update file and photo in gridview

Question

 Hai i have a PDF the file which will be uploaded into my data base

  table my

id int
name varchar (50)
address varchar (200)
photo varchar (200)
article varchar (200)
 
my Successfully to Upload the file and pictures are, how do when article and is intending pohot my replace / update

I created the file folder to store

resources / images
resource / article