第一种,使用Linq查询表达式,code如下
- DataTable testtable = new DataTable();
- testtable.Columns.Add("ID");
- testtable.Columns.Add("ProductName");
- testtable.Rows.Add("1", "1");
- testtable.Rows.Add("1", "1");
- testtable.Rows.Add("1", "1");
- testtable.Rows.Add("2", "2");
- testtable.Rows.Add("3", "3");
- DataTable finalltable = new DataTable();
- finalltable = testtable.Clone();
- finalltable.Clear();
- var rows = from row in testtable.AsEnumerable() group row by row["ID"] into myrow select myrow.FirstOrDefault();
- foreach (DataRow row in rows)
- {
- finalltable.ImportRow(row);
- }
第二种方法
利用dataview来过滤datatable
- <strong>testtable = testtable.DefaultView.ToTable(true, new string[] { "ID", "ProductName" });
- </strong>