Datatable分页

using System;
using System.Collections.Generic;
using System.Web;
using System.Data;

/// <summary>
///Page 的摘要说明
/// </summary>
public class PageList
{
    public PageList()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }
    /// <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 == 0)
            return dt;
        DataTable newdt = dt.Copy();
        newdt.Clear();

        int rowbegin = (PageIndex - 1) * 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 - 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;
    }

    /// <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 > 0)
        {
            page = page + 1;
        }
        return page;
    }

}