合并关联表数据

 /// <summary>
        /// 合并为一条
        /// </summary>
        /// <param name="ds">主Table</param>
        /// <param name="hds">附加table</param>
        /// <returns></returns>
        private DataSet Merge(DataSet ds, DataSet hds)
        {
            Hashtable ht = new Hashtable();
            ht.Add("TERMINALID", "TERMINALID");
            ht.Add("SYNTIME", "SYNTIME");
            foreach (DataRow dr in hds.Tables[0].Rows) ///遍历所有的行
            {
                foreach (DataColumn dc in hds.Tables[0].Columns) //遍历所有的列
                {
                    if (!ht.Contains(dc.ColumnName.ToUpper()))
                    {
                        ds.Tables[0].Columns.Add(dc.ColumnName, typeof(System.String));
                        ds.Tables[0].Rows[0][dc.ColumnName] = dr[dc].ToString();
                    }
                }
            }
            return ds;
        }