/// <summary>
/// Сохранить файл
/// </summary>
public IResultAppValue <string> SaveAs(string filePath) =>
Path.GetExtension(filePath).
WhereContinue(fileExtension => ValidFileExtensions.IsFileExtensionEqual(fileExtension, FileExtensionType.Xlsx),
okFunc: fileExtension => new ResultAppValue <string>(filePath).
ResultVoidOk(_ => _workbook.SaveAs(filePath)),
badFunc: fileExtension => new ResultAppValue <string>(new ErrorApplication(ErrorApplicationType.IncorrectExtension,
$"Некорректное расширение {fileExtension} для файла типа docx")));
/// <summary>
/// Экспорт в DocX
/// </summary>
public string ExportToDocx() =>
Path.GetExtension(_document.FullName).
WhereOk(fileExtension => !ValidFileExtensions.IsFileExtensionEqual(fileExtension, FileExtensionType.Docx),
_ => { _document.SaveAs(_document.FullName + "x", WdSaveFormat.wdFormatXMLDocument); return(_document.FullName); });