Upload ,disply ,Download files using ajax jqueary?

Question

Dear All,

 

i have sql table like bellow ..

 

 

id	int
type	varchar(50)
name	varchar(50)
extension	varchar(50)

 

now my requirement is ..

 

 

Upload files like image,pdf,word,excell.. to my table .

 retreve from database

disply in html table . with download buttom .

if i hit need to download the file ...

 

 

i want to do thease operations using

 

 

asp.net ajax jqueary webmethods .please help me how can i do this?