Add backload for multiple file upload

Web/Controllers/LeafInputController.cs

@@ -1,4 +1,6 @@
-using System.Web.Mvc;
+using System.IO;
+using System.Linq;
+using System.Web.Mvc;
 using LeafWeb.Web.ViewModels.LeafInput;
 
 namespace LeafWeb.Web.Controllers
@@ -7,13 +9,33 @@ namespace LeafWeb.Web.Controllers
     {
         public ActionResult Index()
         {
+			// initialize the session storage to retain SessionID between requests
+	        Session["placeholder"] = 0;
             return View();
         }
 
 		[HttpPost]
         public ActionResult Index(CreateViewModel viewModel)
         {
-            return View();
+			// directory name is the sessionID
+			var directory = Session.SessionID;
+			var path = Path.Combine(Server.MapPath("~/Files/"), directory + "\\");
+			var files = Directory.GetFiles(path);
+
+			if (!files.Any())
+			{
+				ModelState.AddModelError("", "Must select at least one file");
+			}
+
+			if (ModelState.IsValid)
+			{
+				// convert viewModel into Model
+
+				// load files into LeafInputFile
+
+				// 
+			}
+			return View();
         }
     }
 }