var list = dt.AsEnumerable().Select(t => t.Field<string>("列名")).ToList();

/*遍历DataTable*/

        class ClientStruct

        {

            public string ID = "ID";

            public string Name = "Name";

            public string Company = "Company";

            public string CreatedDate = "CreatedDate";

        }



        public string[,] infoArr = new string[,] { { "1", "百度", "baidu", "201303" }, { "2", "迅雷", "xunlei", "201302" }, { "3", "谷歌", "guge", "201301" } };

        protected void LinqDataTable()

        {

            DataRow row;

            ClientStruct cs = new ClientStruct();

            DataTable dtTable = new DataTable();

            dtTable.Columns.Add(cs.ID);

            dtTable.Columns.Add(cs.Name);

            dtTable.Columns.Add(cs.Company);

            dtTable.Columns.Add(cs.CreatedDate);

            for (int i = 0; i < 3; i++)

            {

                row = dtTable.NewRow();

                row[cs.ID] = infoArr[i, 0];

                row[cs.Name] = infoArr[i, 1];

                row[cs.Company] = infoArr[i, 2];

                row[cs.CreatedDate] = infoArr[i, 3];

                dtTable.Rows.Add(row);

            }



            //遍历DataTable，取出所有的ID

       &nb