[DotNetDevelopment] List files from directory

[nag]

hii
im listing files from directory..here is my code
i feel its nt a secure code
Is anyone knw secure code please let me knw

 void Page_Load(object sender, EventArgs e)
    {
        string dirname = Session["projectid"].ToString();

        string Path = Server.MapPath(".") + "\\" + dirname;

        DirectoryInfo dirInfo = new DirectoryInfo(Path);

        articleList.DataSource = dirInfo.GetFiles("*.*");
        articleList.DataBind();
    }




<asp:DataGrid runat="server" id="articleList" Font-Name="Verdana"
    AutoGenerateColumns="False" AlternatingItemStyle-
BackColor="#eeeeee"
    HeaderStyle-BackColor="Navy" HeaderStyle-ForeColor="White"
    HeaderStyle-Font-Size="15pt" HeaderStyle-Font-Bold="True">
  <Columns>
    <asp:HyperLinkColumn DataNavigateUrlField="Name"
DataTextField="Name"
           HeaderText="File Name" />
    <asp:BoundColumn DataField="LastWriteTime" HeaderText="Last Write
Time"
        ItemStyle-HorizontalAlign="Center" DataFormatString="{0:d}" />
    <asp:BoundColumn DataField="Length" HeaderText="File Size"
                ItemStyle-HorizontalAlign="Right"
                DataFormatString="{0:#,### bytes}" />
  </Columns>
</asp:DataGrid>