/// <summary>
        /// import from sheet PoskytovatelZdravotnichSluzeb
        /// </summary>
        /// <param name="excel_con"></param>
        private void ImportPoskytovatelZdravotnichSluzeb(OleDbConnection excel_con)
        {
            DataTable dtExcelData = new DataTable();

            dtExcelData.Columns.AddRange(new DataColumn[3] {
                new DataColumn("Id", typeof(int)),
                new DataColumn("Nazev", typeof(string)),
                new DataColumn("TypPZS", typeof(string))
            });

            using (OleDbDataAdapter oda = new OleDbDataAdapter("SELECT * FROM [PoskytovatelZdravotnichSluzeb$]", excel_con))
            {
                oda.Fill(dtExcelData);

                foreach (DataRow row in dtExcelData.Rows)
                {
                    _dataConnector.CreatePoskytovatelZdravotnichSluzeb((string)row["Nazev"], (string)row["TypPZS"]);
                }
            }
        }