Do you need to perform an Ajax file upload with pure JavaScript? This example lays out the steps to accomplish an Ajax file upload without the need for a JavaScript library like jQuery or Dojo.

More File Upload Options I put together a bunch of file upload tutorials. Pick your technology and get uploading! Want client and server-side JavaScript? Upload files with Node.js Why not upload files ...

Upload a single file in ASP.Net Core MVC In this section we’ll examine how we can take advantage of the IFormFile interface in the Microsoft.AspNetCore.Http namespace to upload one or more files.