C# DataTable分页函数

        /// <summary>
        /// 对DataTable进行分页,起始页为1
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="PageIndex"></param>
        /// <param name="PageSize"></param>
        /// <returns></returns>
        public static DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)
        {
            if (PageIndex == )
                return dt;
            DataTable newdt = dt.Copy();
            newdt.Clear();

            int rowbegin = (PageIndex - ) * PageSize;
            int rowend = PageIndex * PageSize;

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

            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;
        }

        /// <summary>
        /// 获取总页数
        /// </summary>
        /// <param name="sumCount">结果集数量</param>
        /// <param name="pageSize">页面数量</param>
        /// <returns></returns>
        public static int getPageCount(int sumCount, int pageSize)
        {
            int page = sumCount / pageSize;
            if (sumCount % pageSize > )
            {
                page = page + ;
            }
            return page;
        }