Upload files to database using jQuery Uploadify Plugin in ASP.Net

1. Anchor Tag cannot do postback.

2. Since you are doing jQuery upload you will need to save the files to database inside handler. For that you need to get Byte array of the uploaded file as following

            HttpPostedFile postedFile = context.Request.Files["Filedata"];
            System.IO.Stream fs = postedFile.InputStream;
            System.IO.BinaryReader br = new System.IO.BinaryReader(fs);
            Byte[] bytes = br.ReadBytes((Int32)fs.Length);
            //Now save the byte to database

Once you have the byte array you can refer my article to save byte array to database

Save and Retrieve Files from SQL Server Database using ASP.Net