DataSet 去除重复的行

 1 /// <summary>
 2         /// 获取对固定列不重复的新DataTable
 3         /// </summary>
 4         /// <param name="dt">含有重复数据的DataTable</param>
 5         /// <param name="colName">需要验证重复的列名</param>
 6         /// <returns>新的DataTable，colName列不重复，表格式保持不变</returns>
 7         private DataTable GetDistinctTable(DataTable dt, string colName)
 8         {
 9             DataView dv = dt.DefaultView;
10             DataTable dtCardNo = dv.ToTable(true, colName);
11             DataTable Pointdt = new DataTable();
12             Pointdt = dv.ToTable();
13             Pointdt.Clear();
14             for (int i = 0; i < dtCardNo.Rows.Count; i++)
15             {
16                 DataRow dr = dt.Select(colName + "='" + dtCardNo.Rows[i][0].ToString() + "'")[0];
17                 Pointdt.Rows.Add(dr.ItemArray);
18             }
19             return Pointdt;
20         }

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