C#过滤DataTable的内容

/// <summary>
        /// 根据字段过滤表的内容
        /// </summary>
        /// <param name="data">表数据</param>
        /// <param name="condition">条件</param>
        /// <returns></returns>
        /// 
        public static DataTable GetDataFilter(DataTable data, string condition)
        {
            if (data != null && data.Rows.Count > 0)
            {
                if (condition.Trim() == "")
                {
                    return data;
                }
                else
                {
                    DataTable newdt = new DataTable();
                    newdt = data.Clone();
                    DataRow[] dr = data.Select(condition);
                    for (int i = 0; i < dr.Length; i++)
                    {
                        newdt.ImportRow((DataRow)dr[i]);
                    }
                    return newdt;
                }
            }
            else
            {
                return null;
            }
        }