Fix for browsers sending the complete file path

Some browsers sends the full user local path to the file being uploaded. So I fixed the example because will not work and is a security risk if the webapp has too much rights.
IE case: https://msdn.microsoft.com/en-us/library/ms535128%28v=vs.85%29.aspx

Author: Sososlik

c#/HomeController.cs

@@ -26,7 +26,8 @@ public ActionResult UploadFile()
                 string category = HttpContext.Request.Params["category"];
 
                 DirectoryInfo di = Directory.CreateDirectory(Server.MapPath("~/Tmp/Files"));// If you don't have the folder yet, you need to create.
-                string savedFileName = Path.Combine(di.FullName, hpf.FileName);
+                string sentFileName = Path.GetFileName(hpf.FileName); //it can be just a file name or a user local path! it depends on the used browser. So we need to ensure that this var will contain just the file name.
+                string savedFileName = Path.Combine(di.FullName, sentFileName);
                 hpf.SaveAs(savedFileName);
 
                 var msg = new { msg = "File Uploaded", filename = hpf.FileName, url= savedFileName };
@@ -64,4 +65,4 @@ public ActionResult DeleteFile(string url)
             }
         }
     }
-}
+}