How to use paging In Datalist

<asp:DataList ID="DataList1" runat="server" RepeatDirection="Horizontal" RepeatColumns="5"
                                EnableViewState="true" Width="88%">
                                <itemtemplate>
                                   "xyz"
                                </itemtemplate>
                            




 <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString='<%$ ConnectionStrings:ConnString %>'
                        SelectCommand="SELECT x,y,z ...">
                    
                    <tr>
                        <td>
                              <asp:Label ID="lblCurrentPage" runat="server" Visible="true">
                        </td>
                    </tr>
                    <tr>
                        <td align="center">
                              <asp:Button ID="cmdPrev" runat="server" Text=" << " OnClick="cmdPrev_Click">
                            
                             <asp:Button ID="cmdNext" runat="server" Text=" >> " OnClick="cmdNext_Click">
                            
                        </td>
                    </tr>

 protected void items()
    {
        PagedDataSource objDs = new PagedDataSource();
        DataView dv = (DataView)SqlDataSource1.Select(DataSourceSelectArguments.Empty);
        objDs.DataSource = dv;
        objDs.AllowPaging = true;
        objDs.PageSize = 20;
        objDs.CurrentPageIndex = CurrentPage;
        lblCurrentPage.Text = "Page:" + (CurrentPage + 1).ToString() + " Of " + objDs.PageCount.ToString();
        cmdPrev.Enabled = !objDs.IsFirstPage;
        cmdNext.Enabled = !objDs.IsLastPage;
        DataList1.DataSource = objDs;
       DataList1.DataBind();

    }


protected void cmdPrev_Click(object sender, EventArgs e)
    {
        try
        {
            CurrentPage -= 1;
            items();
        }
        catch (Exception ex)
        {
            Logger.LogException(ex);
        }
    }

    protected void cmdNext_Click(object sender, EventArgs e)
    {
        try
        {

            CurrentPage += 1;
            items();
        }
        catch (Exception ex)
        {
            Logger.LogException(ex);
        }
    }