Upload (Insert) and Download (Retrieve) Files from Database using Generic Handler and jQuery AJAX in ASP.Net

Here Mudassar Ahmed Khan has explained with an example, how to upload (insert) and download (retrieve) Files from SQL Database using Generic Handler and jQuery AJAX in ASP.Net with C# and VB.Net. The Generic Handler will insert and retrieve files from SQL Server database in ASP.Net. The Generic Handler will be called using jQuery AJAX and the file will be uploaded to Database with Progress Bar using HTML5 Form Data and XmlHttpRequest (XHR).