本地数据DataTable实现数据分页

//将datatable数据按照规定进行分页
public DataTable GetSelectData(DataTable dt, int PageIndex, int PageSize)
{
       if (PageIndex == 0)
        return dt;//0页代表每页数据，直接返回

1. DataTable newdt = dt.Copy();
2. newdt.Clear();//copy dt的框架
3. int rowbegin = (PageIndex - 1) * PageSize;
4. int rowend = PageIndex * PageSize;
5. if (rowbegin >= dt.Rows.Count)
6. return newdt;//源数据记录数小于等于要显示的记录，直接返回dt
7. if (rowend > dt.Rows.Count)
8. rowend = dt.Rows.Count;
9. for (int i = rowbegin; i <= rowend - 1; i++)
10. {
11. DataRow newdr = newdt.NewRow();
12. DataRow dr = dt.Rows[i];
13. foreach (DataColumn column in dt.Columns)
14. {
15. newdr[column.ColumnName] = dr[column.ColumnName];
16. }
17. newdt.Rows.Add(newdr);
18. }
19. return newdt;

}