public void SaveToDB(ExcelWorksheet ws)
        {
            DataTable dt            = WorksheetHelper.WorksheetToDT(ws, colsRequired, firstRow, lastRow, firstCol, lastCol);
            DataTable manipulatedDt = ManipulatedDT(dt);

            using (SqlConnection conn = new SqlConnection(_config))
            {
                using (SqlCommand command = new SqlCommand())
                {
                    command.Connection = conn;

                    command.CommandText = "SP_BulkInsertBrandChannel";
                    command.Parameters.Add("@brandchannel", SqlDbType.Structured);
                    command.Parameters["@brandchannel"].TypeName = "UDT_BrandChannels";

                    command.CommandType = CommandType.StoredProcedure;
                    command.Parameters["@brandchannel"].Value = manipulatedDt;

                    conn.Open();
                    command.ExecuteNonQuery();
                    conn.Close();
                }
            }
        }