C# DataTable分页处理

 1       public DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)//PageIndex表示第几页，PageSize表示每页的记录数
 2         {
 3             if (PageIndex == 0)
 4                 return dt;//0页代表每页数据，直接返回
 5 
 6             DataTable newdt = dt.Copy();
 7             newdt.Clear();//copy dt的框架
 8 
 9             int rowbegin = (PageIndex - 1) * PageSize;
10             int rowend = PageIndex * PageSize;
11 
12             if (rowbegin >= dt.Rows.Count)
13                 return newdt;//源数据记录数小于等于要显示的记录，直接返回dt
14 
15             if (rowend > dt.Rows.Count)
16                 rowend = dt.Rows.Count;
17             for (int i = rowbegin; i <= rowend - 1; i++)
18             {
19                 DataRow newdr = newdt.NewRow();
20                 DataRow dr = dt.Rows[i];
21                 foreach (DataColumn column in dt.Columns)
22                 {
23                     newdr[column.ColumnName] = dr[column.ColumnName];
24                 }
25                 newdt.Rows.Add(newdr);
26             }
27             return newdt;
28         }