resize.cs

var imageFile = hiddenFile.Value;
String img = imageFile.Replace("data:image/jpeg;base64,", "").Replace(" ", "+");
byte[] b = Convert.FromBase64String(img);
var timestamp = DateTime.Now.ToString("yyyy_MM_dd_HHmmssfff");
var virtualDirectoryPath = "~/Receipts/" + year + "/";
var fileName = Path.Combine(page.Server.MapPath(virtualDirectoryPath),
timestamp + ".jpg");
System.IO.File.WriteAllBytes(fileName, bytes);