Code:

.......
private int CurrentPage;

private void Page_Load(object sender, System.EventArgs e)
        {
            ....
            if(!Page.IsPostBack)
            {
                conn.Open();
                cmdNext=new OleDbCommand("SELECT TOP 10 id, Polje1, Polje2 FROM tabela1 ORDER BY id DESC", conn);
                fillGrid(cmdNext);
            }

        }

private void fillGrid(System.Data.OleDb.OleDbCommand currentOleDbCommand)
        {
            System.Data.OleDb.OleDbDataReader dr;
            ...
            conn.Open();
            dr=currentOleDbCommand.ExecuteReader();
            DataGrid1.DataSource=dr;
            DataGrid1.DataBind();
            dr.Close();
            conn.Close();
            ViewState["CurrentPage"]=CurrentPage;
            ViewState[CurrentPage.ToString()]=DataGrid1.Items[0].Cells[0].Text;

            if(DataGrid1.Items.Count<DataGrid1.PageSize)
            {
                btnNext.Enabled=false;
            }
        }
private void btnNext_Click(object sender, System.EventArgs e)
        {

            btnPrevious.Enabled=true;
            CurrentPage=(int)(ViewState["CurrentPage"]);
            CurrentPage++;
            string lastid=DataGrid1.Items[9].Cells[0].Text;
            conn.Open();
            string upit="SELECT TOP 10 id, Polje1, Polje2 FROM tabela1 WHERE id<"+lastid+" ORDER BY id DESC";
            cmdNext=new OleDbCommand(upit, conn);
            fillGrid(cmdNext);
        }

private void btnPrevious_Click(object sender, System.EventArgs e)
        {
            btnNext.Enabled=true;
            CurrentPage=(int)(ViewState["CurrentPage"]);
            CurrentPage--;
            if(CurrentPage>=0)
            {
                string firstid;
                firstid=(string)(ViewState[CurrentPage.ToString()]);
                conn.Open();
                cmdPrevious=new OleDbCommand("SELECT TOP 10 id, Polje1, Polje2 FROM tabela1 WHERE id>="+firstid+" ORDER BY id DESC", conn);
                fillGrid(cmdPrevious);
            }
        }