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ASP.NET Tutorial » ASP.net Controls » Menu 
3. 22. 10. Menu Database
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Configuration" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server">
    void Page_Load()
    {
        if (!Page.IsPostBack)
            PopulateMenu();
    }
    private void PopulateMenu()
    {
        DataTable menuData = GetMenuData();
        AddTopMenuItems(menuData);
    }
    private DataTable GetMenuData()
    {
        string selectCommand = "SELECT CategoryId,ParentId,Name FROM Categories";
        string conString = WebConfigurationManager.ConnectionStrings["Categories"]. ConnectionString;
        SqlDataAdapter dad = new SqlDataAdapter(selectCommand, conString);
        DataTable dtblCategories = new DataTable();
        dad.Fill(dtblCategories);
        return dtblCategories;
    }    
    private void AddTopMenuItems(DataTable menuData)
    {
        DataView view = new DataView(menuData);
        view.RowFilter = "ParentID IS NULL";
        foreach (DataRowView row in view)
        {
            MenuItem newMenuItem = new MenuItem(row["Name"].ToString(), row["CategoryId"].ToString());
            Menu1.Items.Add(newMenuItem);
            AddChildMenuItems(menuData, newMenuItem);
        }

    }

    private void AddChildMenuItems(DataTable menuData, MenuItem parentMenuItem)
    {
        DataView view = new DataView(menuData);
        view.RowFilter = "ParentID=" + parentMenuItem.Value;
        foreach (DataRowView row in view)
        {
            MenuItem newMenuItem = new MenuItem(row["Name"].ToString(), row["CategoryId"].ToString());
            parentMenuItem.ChildItems.Add(newMenuItem);
            AddChildMenuItems(menuData, newMenuItem);
        }
    }

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <style type="text/css">
        .menuItem
        {
            border:Solid 1px black;
            width:100px;
            padding:2px;
            background-color:#eeeeee;
        }
        .menuItem a
        {
            color:blue;
        }
        .grid
        {
            margin-top:10px;
        }

        .grid td, .grid th
        {
            padding:10px;
        }
    </style>
    <title>Menu Database</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <asp:Menu
        id="Menu1"
        Orientation="horizontal"
        StaticMenuItemStyle-CssClass="menuItem"
        DynamicMenuItemStyle-CssClass="menuItem"
        Runat="server" />

    <asp:GridView
        id="grdProducts"
        DataSourceID="srcProducts"
        CssClass="grid"
        AutoGenerateColumns="false"
        Runat="server">
        <Columns>
        <asp:BoundField
            DataField="ProductName"
            HeaderText="Product" />
        <asp:BoundField
            DataField="Price"
            HeaderText="Price"
            DataFormatString="{0:c}" />
        </Columns>
    </asp:GridView>

    <asp:SqlDataSource
        id="srcProducts"
        ConnectionString="<%$ ConnectionStrings:Categories %>"
        SelectCommand="SELECT ProductName,Price FROM Products
            WHERE CategoryId=@CategoryId"
        Runat="server">
        <SelectParameters>
        <asp:ControlParameter
            Name="CategoryId"
            ControlID="Menu1" />
        </SelectParameters>
    </asp:SqlDataSource>


    </div>
    </form>
</body>
</html>
3. 22. Menu
3. 22. 1. Displaying a menu with the Menu control.
3. 22. 2. MenuLinkButton
3. 22. 3. Using the Menu Control with the MultiView Control
3. 22. 4. Applying styles to different menu levels.
3. 22. 5. Displaying a desktop application menu.
3. 22. 6. Using Templates with the Menu Control
3. 22. 7. Binding Menu to a Site Map
3. 22. 8. Menu Navigation
3. 22. 9. Binding to an XML File
3. 22. 10. Menu Database
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