public DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)//PageIndex表示第几页，PageSize表示每页的记录数

         {

             if (PageIndex == )

                 return dt;//0页代表每页数据，直接返回

             DataTable newdt = dt.Copy();

             newdt.Clear();//copy dt的框架

             int rowbegin = (PageIndex - ) * PageSize;

             int rowend = PageIndex * PageSize;

             if (rowbegin >= dt.Rows.Count)

                 return newdt;//源数据记录数小于等于要显示的记录，直接返回dt

             if (rowend > dt.Rows.Count)

                 rowend = dt.Rows.Count;

             for (int i = rowbegin; i <= rowend - ; i++)

             {

                 DataRow newdr = newdt.NewRow();

                 DataRow dr = dt.Rows[i];

                 foreach (DataColumn column in dt.Columns)

                 {

                     newdr[column.ColumnName] = dr[column.ColumnName];

                 }

                 newdt.Rows.Add(newdr);

             }

             return newdt;

         }