public partial class Form11 : Form
    {
        public Form11()
        {
            InitializeComponent();
        }

        private int Inum = 1;  //行號，規定其索引初始值為1
        int pagesize = 4;
        int allCount =0;
        int pagecount = 0;

             
        private void Form11_Load(object sender, EventArgs e)
        {
            using(SqlConnection connection = new SqlConnection("server=數伺服器名稱;uid=sa;pwd=sa;database=資料庫名"))
            {

                SqlDataAdapter da = new SqlDataAdapter("select * from tb_Land", connection);

                DataTable dt = new DataTable();

                da.Fill(dt);

                allCount = dt.Rows.Count;    //獲取資料表中記錄的個數
                

                pagecount = allCount  % pagesize;   //頁數 = 總數/顯示的行數

                //只能顯示一頁,判斷是否是整除
                if (pagecount == 0)
                {
                    pagecount =allCount  / pagesize;
                }
                else
                {
                    pagecount = allCount / pagesize + 1;
                }

                this.label1.Text = "共" + pagecount.ToString() + "頁";           

     
                show(1,4);                                                              //分頁顯示記錄

                // this.label2.Text = "當前第" + Inum.ToString() + "頁";
            }
        }

        /// <summary>
        /// 分頁顯示資料表中的資訊
        /// </summary>
        /// <param name="start"></param>
        /// <param name="end"></param>
        private void show(int start,int end)
        {
            SqlConnection connection = new SqlConnection("server=伺服器名稱;uid=sa;pwd=sa;database=資料庫名稱");

            SqlDataAdapter das = new SqlDataAdapter("select top "+pagesize+" * from tb_Land where Id not in (select top "+pagesize*(Inum-1)+" Id from

tb_Land)",connection);                    //sql語句

            DataSet ds = new DataSet();  

            //顯示指定範圍的記錄
            das.Fill(ds,"one");

            this.dataGridView1.DataSource = ds.Tables["one"].DefaultView;   //繫結顯示資料       
            ds = null;
        }

        //第一頁
        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Inum = 1;
            show(Inum, pagesize);
        }

        //末尾頁
        private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Inum = pagecount;
            show(Inum-1, pagesize);
        }

        //下一頁
        private void linkLabel3_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Inum++;
            if (Inum <= pagesize)              //如果沒有超出記錄行數
            {
                show(Inum, pagesize);
            }
            else
            {
                MessageBox.Show("現已是最後一頁記錄");
                Inum = pagecount-1;     更改為       Inum = pagecount;
                return;
            }
        }

        //上一頁
        private void linkLabel4_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
       {        
            Inum--;
            if (Inum > 0)                     //如果當前不是首記錄
            {
                show(Inum, pagesize);                 //顯示上一頁記錄
            }
            else
            {
                MessageBox.Show("現已是第一頁記錄");
                Inum = 1;                       

                return;
            }
        }

        
    }
}

當前顯示的頁數，實現的有點小問題。可能有些細節上的小問題，希望大家多提建議！（感謝大家提的建議，現已更改）