namespace A

{

    class Program

    {

        static void Main(string[] args)

        {

            DataTable dt = new DataTable();

            dt.Columns.Add("Id",typeof(int));

            Random r = new Random(DateTime.Now.Millisecond);

            //随机生成1000行记录

            for (int i = ; i < ; i++)

            {

                dt.Rows.Add(r.Next(, ));

            }

            DataView dv = new DataView(dt);

            dt = dv.ToTable(true, "Id");    //对Id进行过滤，true表示使用distinct方法

            foreach (DataRow item in dt.Rows)

            {

                Console.WriteLine(item["Id"].ToString());

            }

        }

    }

}

DataView dv = new DataView(dt);

dt = dv.ToTable(true, new string[] { "Id","Value" });