Add backload for multiple file upload

Web/Backload/Controller/BackloadController.cs

@@ -0,0 +1,45 @@
+using Backload.Contracts.Context;
+using Backload.Contracts.FileHandler;
+using Backload.Helper;
+using System.Net;
+using System.Threading.Tasks;
+using System.Web;
+using System.Web.Mvc;
+
+namespace Backload.Controllers
+{
+
+    /// <summary>
+    /// The integrated controller to handle file requests. 
+    /// You can remove this code, if you have a custom controller or handler.
+    /// </summary>
+    public partial class BackloadController : Controller
+    {
+        /// <summary>
+        /// The Backload file handler. 
+        /// To access it in an Javascript ajax request use: <code>var url = "/{Application}/Backload/FileHandler/";</code>.
+        /// </summary>
+        [AcceptVerbs(HttpVerbs.Get|HttpVerbs.Post|HttpVerbs.Put|HttpVerbs.Delete|HttpVerbs.Options)]
+        public async Task<ActionResult> FileHandler()
+        {
+            try
+            {
+                // Create and initialize the handler
+                IFileHandler handler = Backload.FileHandler.Create();
+                handler.Init(HttpContext.Request);
+
+
+                // Call the execution pipeline and get the result
+                IBackloadResult result = await handler.Execute();
+
+
+                // Helper to create an ActionResult object from the IBackloadResult instance
+                return ResultCreator.Create(result);
+            }
+            catch
+            {
+                return new HttpStatusCodeResult(HttpStatusCode.InternalServerError);
+            }
+        }
+    }
+}

Web/Backload/Controller/BackloadController.obsolete.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Threading.Tasks;
+using System.Web.Mvc;
+
+namespace Backload.Controllers
+{
+
+    /// <summary>
+    /// The integrated controller to handle file requests. 
+    /// You can remove this code, if you have a custom controller or a derived controller.
+    /// </summary>
+    public partial class BackloadController : Controller
+    {
+        /// <summary>
+        /// This handler is for backward compatibility only. If you have a previous project updated to 
+        /// Backload release 2 or higher, please also update your calls in JavaScript to the new handler url
+        /// /Backload/Filehandler. After that you can remove this handler.
+        /// </summary>
+        [Obsolete("This handler is form backward compatibility only.")]
+        [AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post | HttpVerbs.Put | HttpVerbs.Delete | HttpVerbs.Options)]
+        public async Task<ActionResult> UploadHandler()
+        {
+            return await FileHandler();
+        }
+    }
+}