EpiServer - Save XForm File To VPP Example

     private string CreateWebRootFile(XFormControl form, HttpPostedFile _postedFile, string formName, string oldFiles)  
     {  
       var _uploadedFileName = _postedFile.FileName;  
       var dir = CreatePathToSaveIn("PATH GOES HERE");  
       if (dir != null)  
       {  
         var fileName = Path.GetFileName(_uploadedFileName);  
         var _file = form.Page.Request.Files[formName + "FileUpload"];  
         if (_file != null)  
         {  
           _file.SaveAs(dir + fileName);  
         }  
         _uploadedFileName = "Somepath here";  
         if (oldFiles != String.Empty)  
         {  
           oldFiles += "|";  
         }  
         oldFiles += _uploadedFileName;  
       }  
       return oldFiles;  
     }  
     private UnifiedDirectory CreatePathToSaveIn(string path)  
     {  
       var dir = HostingEnvironment.VirtualPathProvider.GetDirectory(path) as UnifiedDirectory;  
       if (dir == null)  
       {  
         var tmpPath = "/";  
         foreach (var part in path.Split("/".ToCharArray(), StringSplitOptions.RemoveEmptyEntries))  
         {  
           tmpPath += part + "/";  
           var tmp = HostingEnvironment.VirtualPathProvider.GetDirectory(tmpPath) as UnifiedDirectory;  
           if (tmp != null)  
             dir = tmp;  
           else if (dir != null)  
           {  
             dir.BypassAccessCheck = true;  
             dir = dir.CreateSubdirectory(part);  
           }  
         }  
      }  
       return dir;