DataRow[] rows = dt.Select("1=1");
            string[] arr = rows.Select(x => x[0].ToString()).ToArray();

------解决方案--------------------
C# code
 
List<string> strList=new List<string>();
DataRow [] rows=dt.select("1=1")
     foreach (DataRow item in rows)
            {
                strLIst.add(item[0]);
            }