原创代码

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

namespace BindingSourceTest
{
    public partial class Form1 : Form
    {

        int row = 0;     //每页显示行数
        int currentPage = 0;   //当前页号
        int rowCount = 0;      //当前记录行

        int sum = 0;         //总记录数
        int pageCount = 0;    //页数＝总记录数/每页显示行数


        public Form1()
        {
            InitializeComponent();
        }

        //DataSet ds = new DataSet();
        DataTable table = new DataTable();

        private void Form1_Load(object sender, EventArgs e)
        {
            
            SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=北风贸易;integrated security=sspi;");--Data Source后面是服务器名称,Initial Catalog后面是数据库名称,我用的数据库叫北风贸易,最后面那句是固定的                        
            SqlDataAdapter cmd = new SqlDataAdapter("select * from 章立民研究室", con);--章立民研究室是我用的表名
            cmd.Fill(table);

            InitDataSet();
        }

        private void InitDataSet()
        {
            row = 20;      //设置页面行数
            sum = table.Rows.Count;  //总行数

            pageCount = (sum / row);    //计算出总页数

            if ((sum % row) > 0) pageCount++;

            currentPage = 1;    //当前页数从1开始
            rowCount = 0;       //当前记录数从0开始

            LoadData();
        }

        private void LoadData()
        {
            int Start = 0;   //当前页面开始记录行
            int End = 0;     //当前页面结束记录行

            DataTable tableClone = table.Clone();   //克隆DataTable结构框架

            #region 设置按钮的可用

            if (currentPage <= 1)
            {
                toolStripLabel2.Enabled = false;
            }
            else
            {
                toolStripLabel2.Enabled = true;
            }

            if (currentPage >= pageCount)
            {
                toolStripLabel3.Enabled = false;
            }
            else
            {
                toolStripLabel3.Enabled = true;
            }

            #endregion

            if (currentPage == pageCount)
                End = sum;
            else
                End = row * currentPage;

            Start = rowCount;

            lblPageCount.Text = pageCount.ToString();
            txtCurrentPage.Text = Convert.ToString(currentPage);

            //从元数据源复制记录行
            for (int i = Start; i < End; i++)
            {
                tableClone.ImportRow(table.Rows[i]);                
                rowCount++;
            }
            bdsInfo.DataSource = tableClone;
            bdnInfo.BindingSource = bdsInfo;
            dgvInfo.DataSource = bdsInfo;
        }
    DataGridView上的ItemClick事件
        private void bdnInfo_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
        {            
            if (e.ClickedItem.Text == "上一页")
            {
                currentPage--;
                if (currentPage <= 0)
                {
                    MessageBox.Show("已经是第一页，请点击“下一页”查看！");
                    return;
                }
                else
                {
                    rowCount = row * (currentPage - 1);
                }

                LoadData();
            }
            if (e.ClickedItem.Text == "下一页")
            {
                currentPage++;
                if (currentPage > pageCount)
                {
                    MessageBox.Show("已经是最后一页，请点击“上一页”查看！");
                    return;
                }
                else
                {
                    rowCount = row * (currentPage - 1);
                }
                LoadData();
            }
        }      
        
    }
}

注意:bdsInfo 是BindingSource
bdnInfo 是BindingNavigator
dgvInfo 是DataGridView