Dynamic menu for .net

 

c# code:   
 protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            this.lbl_Menu.Text = GetMenu("9999","999");
            this.lbl_UserName.Text = "Tim";
            this.lbl_MacIP.Text = Page.Request.UserHostAddress;
        }
    }

    private string GetMenu(string UserID, string TopMenuID)
    {
        System.Data.DataSet ds = GetMenuDataSet(UserID);
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        sb.Append("<ul class='topnav'>");
        if (ds.Tables.Count != 0 && ds.Tables[0].Rows.Count != 0)
        {
            System.Data.DataView dv = ds.Tables[0].DefaultView;
            dv.RowFilter = "MenuUppID='999'";
            System.Data.DataTable dt = dv.ToTable();
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                System.Data.DataRow dr = dt.Rows[i];
                sb.Append("<li><a href='" + (dr[2] != null ? dr[2].ToString() : "") + "'>" +
                    (dr[1] != null ? dr[1].ToString() : "") + "</a>");

                string subString = getSubMenu(dr[0].ToString(), dv);
                if (subString != "")
                {
                    sb.Append(subString);
                }

            }
        }
        sb.Append("</ul>");
        return sb.ToString();
    }

    private string getSubMenu(string MenuUppID,System.Data.DataView dv)
    {
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        dv.RowFilter = "MenuUppID='" + MenuUppID + "'";
        System.Data.DataTable dt = dv.ToTable();
        if (dt.Rows.Count != 0)
        {
            sb.Append("<ul style=\"display: none;\" class=\"subnav\">");
        }
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            System.Data.DataRow dr = dt.Rows[i];
            sb.Append("<li><a href='" + (dr[2] != null ? dr[2].ToString() : "") + "'>" +
                (dr[1] != null ? dr[1].ToString() : "") + "</a>");
        }
        if (sb.Length != 0)
        {
            sb.Append("</ul>");
        }
        return sb.ToString();
    }

    private System.Data.DataSet GetMenuDataSet(string userID)
    {
        System.Data.DataSet ds = new System.Data.DataSet();
        System.Data.DataTable dt = new System.Data.DataTable();
        dt.Columns.Add("ID");
        dt.Columns.Add("MenuName");
        dt.Columns.Add("MenuUrl");
        dt.Columns.Add("MenuUppID");
        dt.Columns.Add("MenuSort");

        System.Data.DataRow dr = dt.NewRow();
        
        dr[0] = "0";
        dr[1] = "首页";
        dr[2] = "index.htm";
        dr[3] = "999";
        dr[4] = "1";

        dt.Rows.Add(dr);

        System.Data.DataRow dr1 = dt.NewRow();

        dr1[0] = "1";
        dr1[1] = "信息中心";
        dr1[2] = "a.htm";
        dr1[3] = "999";
        dr1[4] = "1";

        dt.Rows.Add(dr1);

        System.Data.DataRow dr2 = dt.NewRow();

        dr2[0] = "2";
        dr2[1] = "信息查询";
        dr2[2] = "a1.htm";
        dr2[3] = "1";
        dr2[4] = "2";

        dt.Rows.Add(dr2);

        System.Data.DataRow dr3 = dt.NewRow();

        dr3[0] = "3";
        dr3[1] = "信息修改";
        dr3[2] = "a2.htm";
        dr3[3] = "1";
        dr3[4] = "3";

        dt.Rows.Add(dr3);

        System.Data.DataRow dr4 = dt.NewRow();

        dr4[0] = "4";
        dr4[1] = "个人信息";
        dr4[2] = "a3.htm";
        dr4[3] = "999";
        dr4[4] = "4";

        dt.Rows.Add(dr4);

        System.Data.DataRow dr5 = dt.NewRow();

        dr5[0] = "5";
        dr5[1] = "网上";
        dr5[2] = "a3.htm";
        dr5[3] = "999";
        dr5[4] = "5";

        dt.Rows.Add(dr5);

        ds.Tables.Add(dt);
        return ds;
    }

    <style type="text/css">
        body {
	        margin: 0; padding: 0;
	        font: 10px normal Arial, Helvetica, sans-serif;
	        background: #ddd url(Images/body_bg.gif) repeat-x;
        }
        .container {
	        width: 960px;
	        margin: 0 auto;
	        position: relative;
        }
        ul.topnav li {
	        float: left;
	        margin: 0;	
	        padding: 0 15px 0 0;
	        position: relative; /*--Declare X and Y axis base--*/
	        
        }
        ul.topnav li a{
	        padding: 10px 5px;
	        color: #fff;
	        display: block;
	        text-decoration: none;
	        float: left;
        }
        ul.topnav li a:hover{
	        background: url(Images/topnav_hover.gif) no-repeat center top;
        }
        ul.topnav li span { /*--Drop down trigger styles--*/
	        width: 17px;
	        height: 35px;
	        float: left;
	        background: url(Images/subnav_btn.gif) no-repeat center top;
        }
        ul.topnav li span.subhover {background-position: center bottom; cursor: pointer;}
        ul.topnav li ul.subnav {
	        list-style: none;
	        position: absolute; /*--Important - Keeps subnav from affecting main navigation flow--*/
	        left: 0; top: 35px;
	        background: #333;
	        margin: 0; padding: 0;
	        display: none;
	        float: left;
	        width: 170px;
	        border: 1px solid #111;
        }
        ul.topnav li ul.subnav li{
	        margin: 0; padding: 0;
	        border-top: 1px solid #252525; /*--Create bevel effect--*/
	        border-bottom: 1px solid #444; /*--Create bevel effect--*/
	        clear: both;
	        width: 170px;
        }
        html ul.topnav li ul.subnav li a {
	        float: left;
	        width: 145px;
	        
	        padding-left: 20px;
        }
        html ul.topnav li ul.subnav li a:hover { /*--Hover effect for subnav links--*/
	        background: #222 url(Images/dropdown_linkbg.gif) no-repeat 10px center; 
        }
    </style>

<script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>

<script type="text/javascript">
        $(document).ready(function () {
            $("ul.subnav").parent().append("<span></span>");
            $("ul.topnav li span").click(function () { 
                $(this).parent().find("ul.subnav").slideDown('fast').show();
                $(this).parent().hover(function () {
                }, function () {
                    $(this).parent().find("ul.subnav").slideUp('slow'); 
                });
            }).hover(function () {
                $(this).addClass("subhover"); 
            }, function () { 
                $(this).removeClass("subhover"); 
            });
        });
    </script>

<div class="container">
        <div id="topbanel" style="background: #ddd url(Images/body_bg.gif) repeat-x; height:102px">
            
        </div>

        <div id="header">
            <asp:Label runat="server" Text="" ID="lbl_Menu"></asp:Label>
        </div>
    </div>

    <div >
        <div>欢迎您！<asp:Label ID="lbl_UserName" runat="server"></asp:Label>   您的IP：<asp:Label ID="lbl_MacIP" runat="server"></asp:Label></div>
    </div>