Send the adrress of file from behind code (C#) to design page (HTML)

Question

User-29540527 posted

I wanna to sent the adress of file from  here (behind code):

 if (e.CommandArgs.CommandName == "OpenPDF")
   
  {
    Response.TransmitFile(Server.MapPath("~/Data/") + e.CommandArgs.CommandArgument); //need send this adress of file 
     } 

to here to src??? (design page) 

<embed width="735px" height="1705"    src="?????">  
         
</embed>

Please help me somebody.

Thanks