将特定列从一个DataTable复制到另一个
问题描述：
在DataTable中读取一些数据（来自excel文件），现在我要过滤并将特定列复制到另一个！
Have some read in data (from excel file) in a DataTable and now I want to filter this and copy only specific columns to the other one!
dataTable格式：
dataTable format:
some data
ColA|ColB|ColC
xxxx|xxxx|xxxx
some data
某些数据表示其他表数据与ColA-ColC相关
some data represents other table data not related to ColA-ColC
如何将ColA-ColC与xxxx复制到新的DataTable？
How can I copy ColA-ColC with xxxx to the new DataTable?
Thx
答
复制整个表格并删除列不要。
Copy the whole table and remove the columns you don't want.
DataTable copyDataTable;
copyDataTable = table.Copy();
copyDataTable.Columns.Remove("ColB");
或
int columnIndex = 1;//this will remove the second column
DataTable copyDataTable;
copyDataTable = table.Copy();
copyDataTable.Columns.RemoveAt(columnIndex);