使用所需的列配置将Datatable1值复制到Datatable2

Question

仅将特定列的数据从Datatable1复制到Datattable2。我有一个方法，列vlaues的列表和Datatable作为输入。我需要从输入数据表中获取所有列，然后复制到新的数据表中。

/*Input:
columnNames in list : column1,column2,column3
datatable1 : column1,column2,column5,column6,column3
Output:
datatble2 : column1,column2,column3 (columns from list need to be copied from datatble1 to datatble2 and return datatble2)
*/
public DataTable CopyFromDatatbale(List<string> columnNames,DataTable datatable1)
{
             DataTable datatble2=new DataTable();
             /*
               Code to copy the data from datatable1 to datatble2 with specific columns
             */

}

Answer 1

这是我正在寻找的代码...将指定列的数据从DataTable1复制到DataTable2。最后在datatable2中，我具有datatble1的所有列（仅特定列）

//Copy Columns from Datatable1 to Datatble2 based on columns on columnList
            DataView dtView = new DataView(dataTable1);
            DataTable dataTable2= new DataTable();
            var getColumnNamesCommaSeperated = columnList.Select(x => x.columnNames).ToArray();
            dataTable2= dataTable1.Select().CopyToDataTable()
                .DefaultView.ToTable(false, getColumnNamesCommaSeperated);