DataTable的Select方法，取得的是个Row数组，若要取其中的值，还需要再次for。

private void GetRowsByFilter(){    DataTable table = DataSet1.Tables["Orders"];    string expression = "Date > '1/1/00'";    string sortOrder = "CompanyName DESC";    DataRow[] foundRows;    foundRows = table.Select(expression, sortOrder);    for(int i = 0; i < foundRows.Length; i ++)    {        Console.WriteLine(foundRows[i][0]);    }}