DataGridView实现分页

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections;

namespace XjxMobilenursing
{
    public partial class PagerCtrl : UserControl
    {
        public PagerCtrl()
        {
            InitializeComponent();
        }
        [Browsable(true)]
        [Category("页面记录数")]
        [Description("显示页面记录数")]
        [DefaultValue(typeof(int), "10")]
        public int PageSize{ get;set; }
        public Hashtable condition { get; set; }//查询条件
        private int totalCount = 0;//总记录数
        public int TotalCount
        {
            get { return totalCount; }
            set 
            {
                totalCount = value;
                if (totalCount <= 0) totalCount = 0;
                if (totalCount <= PageSize)
                {
                    lkbNextPage.Enabled = false;
                }
                else
                {
                    lkbNextPage.Enabled = true;
                }
                lkbPrePage.Enabled = false;
                lblPageSize.Text = PageSize.ToString();
                lblTotalCount.Text = totalCount.ToString();
                lblPageNum.Text = PageNum.ToString();
            }
        }
        public int BeginPage//起始记录
        {
            get 
            {
                return (currentPage - 1) * PageSize + 1; 
            }
        }
        public int EndPage { //结束记录
            get {
                if ((CurrentPage < PageNum) || TotalCount % PageSize == 0)
                    {
                        return BeginPage + PageSize - 1;
                    }
                return BeginPage + (TotalCount % PageSize) - 1;
             }
        }

        private int currentPage = 1;//当前第几页
        public int CurrentPage
        {
            get { return currentPage; }
            set 
            {
                currentPage = value;
                lblCurrentPage.Text = currentPage.ToString();
            }
        }

        public int PageNum
        {
            get 
            { 
                int pageNum = 0;//总的页数
                if (PageSize > 0)
                {
                    pageNum = (totalCount % PageSize == 0) ? (totalCount / PageSize) : (totalCount / PageSize) + 1;
                }
                return pageNum;
            }
        }
        public delegate void LoadDataSouceDelegate(Hashtable condition);
        public event LoadDataSouceDelegate LoadDataSouce;
        private void lkbFirstPage_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {//首页
            CurrentPage = 1;
            LoadDataSouce(condition);
            lkbPrePage.Enabled = false;
            if (TotalCount > PageSize)
            {
                lkbNextPage.Enabled = true;
            }
        }

        private void lkbPrePage_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {//上一页
            CurrentPage--;
            LoadDataSouce(condition);
            lkbNextPage.Enabled = true;
            if (CurrentPage <= 1)
            {
                CurrentPage = 1;
                lkbPrePage.Enabled = false;
            }
            else
            {
                lkbPrePage.Enabled = true;
            }
        }

        private void lkbNextPage_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {//下一页
            CurrentPage++;
            LoadDataSouce(condition);
            lkbPrePage.Enabled = true;
            if (CurrentPage < PageNum)
            {
                lkbNextPage.Enabled = true;
            }
            else
            {
                CurrentPage = PageNum;
                lkbNextPage.Enabled = false;
            }
        }

        private void lkbLastPage_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {//尾页
            CurrentPage = PageNum;
            LoadDataSouce(condition);
            lkbNextPage.Enabled = false;
            if (TotalCount > PageSize)
            {
                lkbPrePage.Enabled = true;
            }
        }

        private void btnGo_Click(object sender, EventArgs e)
        {//跳转
            if (!StringCommon.IsNumeric(txtWherePage.Text.Trim()))
            {
                MessageBox.Show("请输入数字");
                return;
            }
            int goWherePage = StringCommon.ToInt32Value(txtWherePage.Text.Trim(),1);
            if (goWherePage <= 0 || goWherePage > PageNum)
            {
                MessageBox.Show(string.Format("请输入1~{0}之间的数",PageNum)); 
                return;
            }
            CurrentPage = goWherePage;
            LoadDataSouce(condition);
            if (CurrentPage <= 1)
            {
                lkbPrePage.Enabled = false;
            }
            else
            {
                lkbPrePage.Enabled = true;
            }
            if (CurrentPage < PageNum)
            {
                lkbNextPage.Enabled = true;
            }
            else
            {
                lkbNextPage.Enabled = false;
            }
        }
    }
}