private void LoadFile()
        {
            if (!_openFileService.DetermineFile())
            {
                return;
            }

            if (_openFileService.File.Extension.ToLower().Equals(".pdf"))
            {
                _pdfService.Init(_openFileService.File.FullName);
            }
            else
            {
                _pdfService.Init(_openFileService.Files
                                 .OrderBy(f => f.Name)
                                 .Select(f => f.OpenRead())
                                 .ToArray()
                                 );
            }
            _characterSheet.SetSheetPreview();
            NotifyOfPropertyChange(() => CanExportTemplate);
            NotifyOfPropertyChange(() => CanImportTemplate);
            NotifyOfPropertyChange(() => CanSavePdf);
            //_characterSheet.UpdateFormFields();
            ActivateItem(_characterSheet);
        }