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;
        }