将DataTable进行分页并生成新的DataTable

/// <summary>
/// 将DataTable进行分页并生成新的DataTable
/// </summary>
/// <param name="dt">原DataTable</param>
/// <param name="PageIndex">需要的第n页</param>
/// <param name="PageSize">每页页数</param>
/// <returns>新的DataTable</returns>
public DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)
{
     if (PageIndex == 0)
     {
           return dt;
     }
     DataTable newdt = dt.Copy();
     newdt.Clear();
     //起始行数
     int rowbegin = (PageIndex - 1) * PageSize;
      //结束行数
     int rowend = PageIndex * PageSize;

     if (rowbegin >= dt.Rows.Count)
     {
         return newdt;
     }

     if (rowend > dt.Rows.Count)
     {
         rowend = dt.Rows.Count;
     }
     //生成新的DataTable
     for (int i = rowbegin; i <= rowend - 1; 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;
}