C#中DGV分页功能

完整代码

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

namespace WindowsFormsDGVFenYe
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //源数据
        private DataTable dt_sourceData;
        //当前页码
        private int m_currentPage;
        //总页数
        private int ZongYeShu;
        //每页显示的项数
        private int m_itemsPerPage;
        //总项数
        private int ZongXiangShu;
        //状态
        private enum PageState
        {
            Init = 0,
            Pre = -1,
            Next = 1
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            InitData();//初始化
            GetData();//获取数据
        }
    
        #region  初始化
        private void InitData()
        {
            dt_sourceData = null;
            m_currentPage = 1;//当前页数
            m_itemsPerPage = 10;//每页总项数
            ZongXiangShu = 0;
            ZongYeShu = 0;
        } 
        #endregion

        #region 刷新数据
        private void GetData()
        {
            string strCon = "server=.;database=HSPB;uid=sa;pwd=123;";
            SqlConnection Conn = new SqlConnection(strCon);
            Conn.Open();
            string strSql = "SELECT XingMing, XingBie, XueXing, ChuShengNianYue FROM XiTong_YuanGongXinXi";

            SqlCommand cmd = new SqlCommand(strSql, Conn);
            SqlDataAdapter da = new SqlDataAdapter(cmd);

            //SqlDataAdapter da = new SqlDataAdapter(strSql, Conn);//定义dataadapter

            DataSet ds = new DataSet();
            da.Fill(ds);
            //dataGridView1.DataSource = ds.Tables[0];
            SetSourceData(ds.Tables[0]);
        }

        #endregion

        //设置数据源
        public void SetSourceData(object sourceData)
        {
            dt_sourceData = (DataTable)sourceData;
            //////获取总项数
            ZongXiangShu = dt_sourceData.Rows.Count;
            //////总页数
            ZongYeShu = (ZongXiangShu / m_itemsPerPage) + ((ZongXiangShu % m_itemsPerPage != 0) ? 1 : 0);//总页数
            UpdateUIData(PageState.Init);
        }

        //更新界面信息
        private void UpdateUIData(PageState pageState)
        {
            SetDGVSourceData(pageState);//初始化数据
            m_currentPage += (int)pageState;
            UpdateButtonState(); //更新按钮状态
            SetCurrOfTotalPage();//设置[当前页/总页码]
        }

        //设置DGV的数据源<显示数据>
        private void SetDGVSourceData(PageState pageState)
        {
            DataTable viewData = dt_sourceData.Clone();//复制组织架构
            int nBeginIndex = 0; int nEndIndex = 0;
            GetCurrentPageIndex(pageState, out nBeginIndex, out nEndIndex);
            for (; nBeginIndex < nEndIndex; nBeginIndex++)
            {
                viewData.ImportRow(dt_sourceData.Rows[nBeginIndex]);
            }

            dataGridView1.DataSource = viewData;
        }

        //设置当前页码/总页码
        private void SetCurrOfTotalPage()
        {
            label1.Text = m_currentPage.ToString() + " / " + ZongYeShu.ToString() + " 页";
        }

        //获取当前页码项的最小下标和最大下标
        private void GetCurrentPageIndex(PageState pageState, out int beginIndex, out int endIndex)
        {
            if (PageState.Init == pageState)//初始化
            {
                beginIndex = 0;
                endIndex = m_itemsPerPage;
            }
            else if (PageState.Pre == pageState)//上一页
            {
                endIndex = m_currentPage * m_itemsPerPage;
                beginIndex = (m_currentPage - 1) * m_itemsPerPage;
            }
            else//下一页
            {
                beginIndex = m_currentPage * m_itemsPerPage;
                endIndex = (m_currentPage + 1) * m_itemsPerPage;
            }
            //处理越界情况
            if (beginIndex < 0)
            {
                beginIndex = 0;
            }
            if (endIndex > ZongXiangShu)
            {
                endIndex = ZongXiangShu;
            }
        }

        //上一页按钮
        private void TSB_PrePage_Click(object sender, EventArgs e)
        {
            UpdateUIData(PageState.Pre);
        }

        //下一页按钮
        private void TSB_NextPage_Click(object sender, EventArgs e)
        {
            UpdateUIData(PageState.Next);
        }

        //更新按钮状态
        private void UpdateButtonState()
        {
            //处理上一页按钮
            if (1 == m_currentPage)
            {
                if (TSB_PrePage.Enabled)//屏蔽
                {
                    TSB_PrePage.Enabled = false;
                }
            }
            else if (!TSB_PrePage.Enabled)
            {
                TSB_PrePage.Enabled = true;
            }
            //处理下一页按钮
            if (ZongYeShu == m_currentPage)
            {
                if (TSB_NextPage.Enabled)
                {
                    TSB_NextPage.Enabled = false;
                }
            }
            else if (!TSB_NextPage.Enabled)
            {
                TSB_NextPage.Enabled = true;
            }
        }
    }
}