ASP.Net DataList: Change RepeatDirection to Vertical

How to add RepeatLayout as Vertical

<asp:DataList ID="DataList1" runat="server" VerticalAlign="Center" RepeatLayout="Table" RepeatDirection="Vertical">
    <ItemTemplate>
        <div style="border: 2px solid #ccc;">
            <asp:Image ID="Image1" ImageUrl='<%#Eval("photo") %>' runat="server" hight='30' Width="200" Visible="true" />
            <br />
            <b>Vehicle Reg. No.:</b>
            <asp:Label ID="Label7" Text='<%# Eval("EMP_ID") %>' runat="server" />
            <br />
            <b>Speed (km/h):</b>
            <asp:Label ID="Label3" Text='<%#Eval("EMP_NAME") %>' runat="server" />
            <br />
    </ItemTemplate>
</asp:DataList>

namespace astmngtmnt
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!this.IsPostBack)
            {
                this.BindListView();
            }
        }

        private void BindListView()
        {
            string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
            using (SqlConnection con = new SqlConnection(constr))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    cmd.CommandText = "SELECT * FROM emp where PROJECT_ID='1003 '";
                    // cmd.CommandText = "SELECT Name,Dates,Images FROM ImageDate WHERE Month(GETDATE()) = month(dates) and Day(GETDATE()) = day(Dates) and year(GETDATE())= year(Dates)";
                    cmd.Connection = con;
                    using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
                    {
                        DataTable dt = new DataTable();
                        sda.Fill(dt);
                        DataList1.DataSource = dt;
                        DataList1.DataBind();
                    }
                }
            }
        }
    }
}