合并两个datatable
A B C D
------------------------------
1 2 3 AA
1 2 5 BB
2 3 4 ADF
2 2 3 ADF
A B C De
----------------------------------
1 2 3 AAddd
1 2 5 BBddd
2 3 4 ADFdd
2 2 3 AdDFdd
8 8 9 9999
合并后效果：
A B C D D
---------------------------------------------
1 2 3 AAddd AA
1 2 5 BBddd BB
2 3 4 ADFdd ADF
2 2 3 AdDFdd ADF
------解决方案--------------------------------------------------------
试下这个：
- C# code
DataTable dt1 = new DataTable();dt1.Columns.Add("A", typeof(int));dt1.Columns.Add("B", typeof(int));dt1.Columns.Add("C", typeof(int));dt1.Columns.Add("D", typeof(string));dt1.PrimaryKey = new DataColumn[] { dt1.Columns[0], dt1.Columns[1], dt1.Columns[2] };dt1.Rows.Add(1, 2,3, "AA");dt1.Rows.Add(1, 2,5, "BB");dt1.Rows.Add(2, 3, 4, "ADF");dt1.Rows.Add(2, 2, 3, "ADF");DataTable dt2 = new DataTable();dt2.Columns.Add("A", typeof(int));dt2.Columns.Add("B", typeof(int));dt2.Columns.Add("C", typeof(int));dt2.Columns.Add("De", typeof(string));dt2.PrimaryKey = new DataColumn[] { dt2.Columns[0], dt2.Columns[1], dt2.Columns[2] };dt2.Rows.Add(1, 2, 3, "AAddd");dt2.Rows.Add(1, 2, 5, "BBddd ");dt2.Rows.Add(2, 3, 4, "ADFdd");dt2.Rows.Add(2, 2, 3, "AdDFdd");dt2.Rows.Add(8, 8, 9, "999");DataTable dt3 = dt1.Copy();dt3.Merge(dt2);