Control to display categories and subcategories

[greeny_1984]

Hi,
I have a page containing categories and subcategories.
Iam using datalist to display categories.
I want ot get subcategories based on categories selected.
On clicking on again subcategories i need to display subsubcategories.
ex:
Agriculture
|
V
plantproducts
|
V
beans
|
V
green beans
|
V
product page.
a category can have any no of subcategories in it.
I want to display all this in a single page.
Cn anyone suggest what control to use for it and the procedure.My code is like this

<asp:DataList ID="ddlist" CellPadding="5"
           CellSpacing="5"
           RepeatDirection="Vertical"
           RepeatLayout="Table"
          
   runat="server" OnItemCommand="ddlist_ItemCommand" >
   <HeaderStyle BackColor="#aaaadd">
         </HeaderStyle>

         <AlternatingItemStyle BackColor="Gainsboro">
         </AlternatingItemStyle>

         <HeaderTemplate>
       

       <asp:Label ID="lblh" runat="server" Text="Business Catalogs" ></asp:Label>

         </HeaderTemplate>

<ItemTemplate>
<asp:LinkButton ID="lnkbtn"  runat="server"  CommandArgument='<%# Eval("CAT_ID") %>' ></asp:LinkButton>

</ItemTemplate>
</asp:DataList>

 protected void ddlist_ItemCommand(object source, DataListCommandEventArgs e)
    {
        ContentPlaceHolder mcon = new ContentPlaceHolder();
        mcon = (ContentPlaceHolder)Master.FindControl("ContentPlaceHolder1");
        LinkButton lnk = new LinkButton();
        lnk = (LinkButton)e.Item.FindControl("lnkbtn");
        int id = (int.Parse(lnk.CommandArgument));
        ICollection Catlist = ProductManager.Get_Categories(int.Parse(Session["check"].ToString()), id);
        if (Catlist.Count > 0)
        {
            //Label lbl = new Label();
            //lbl = (Label)ddlist.FindControl("lblh");

            //lbl.Text += ">" + lnk.Text;
            j = j + 1;
            Session["check"] = j.ToString();
            Response.Write(Session["check"].ToString());
            ddlist.DataSource = ((DataRowCollection)Catlist)[0].Table;
            ddlist.DataBind();
            for (int i = 0; i <= ddlist.Items.Count - 1; i++)
            {
                LinkButton hyp = new LinkButton();
                hyp = (LinkButton)ddlist.Items[i].FindControl("lnkbtn");
                hyp.Text = ((DataRowCollection)Catlist)[0].Table.Rows[i].ItemArray[1].ToString();
               
             
            }
           
        }
        else
        {
            Response.Write(Session["check"].ToString());
            Session["check"] = 2;
        
           Response.Redirect("ViewProductInformation.aspx");
        }
      
    }

waiting for your reply