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基于父子类的视图层次菜单

asp.net-mvc-2 html c#

stoic Kobus Kleynhans · 技术社区 · 14 年前

public class Page
{
    public int Id { get; set; }
    public Page Parent { get; set; }
    public string Name { get; set; }
    public string Title { get; set; }
}

我正在将该模型传递给一个视图,需要基于该模型创建一个层次菜单:

<ul>
    <li>Page
        <ul>
            <li>Sub Page</li>
        </ul>
    </li>

我可以在我的控制器中创建标记,但这不利于测试。

有什么想法吗?

1 回复 | 直到 14 年前

Manaf Abu.Rous 14 年前

public class MenuItem
{
    public int MenuID { get; set; }
    public int ID { get; set; }
    public String Label { get; set; }
    public String Link { get; set; }
    public Boolean Show { get; set; }

    public MenuItem(int menuId, int id, string label, string link, Boolean show)
    {
        this.MenuID = menuId;
        this.ID = id;
        this.Label = label;
        this.Link = link;
        this.Show = show;
    }
}

public class Menu
{
    public int ID { get; set; }
    public string Name { get; set; }
    public List<MenuItem> MenuItems { get; set; }

    public Menu(int id, string name)
    {
        this.ID = id;
        this.Name = name;
        this.MenuItems = new List<MenuItem>();
    }

}

public class NavigationModel
{
    public int currentMenuID { get; set; }   
    // used to determine the current displayed Menu to add
    // the "current" class to it. (to be set in the controller)

    public int currentMenuItemID { get; set; } 
    // used to determine the current displayed MenuItem to add
    // the "current" class to it. (to be set in the controller)

    public List<Menu> Menus { get; set; }


    public NavigationModel()
    {
        this.Menus = new List<Menu>();
        // Set Default Menu ( Menu 1 )
        this.currentMenuID = 1;
        // Set Default Menau Item ( None )
        this.currentMenuItemID = 0;
    }
}

private static NavigationModel BuildNavigationMenu(User currentUser, string rootURL)
    {
        string loginURL = rootURL + "Account/LogOn";

        // Main Menu
        Menu MainMenu = new Menu(1, "Home");
        MainMenu.MenuItems.Add(new MenuItem(1, 1, "Welcome", rootURL, true));
        MainMenu.MenuItems.Add(new MenuItem(1, 2, "How It Works", rootURL + "Home/HowDoesItWork", true));

        // Work Menu
        Menu WorkMenu = new Menu(2, "Work");
        WorkMenu.MenuItems.Add(new MenuItem(2, 1, "Profile", rootURL + "User/Profile/" + currentUser.ID , true));
        WorkMenu.MenuItems.Add(new MenuItem(2, 2, "Customers", "#", true));

        // Add Menus To Navigation Model
        NavigationModel navigationMenu = new NavigationModel();
        navigationMenu.Menus.Add(MainMenu);
        navigationMenu.Menus.Add(HireMenu);

        return navigationMenu;
}

//我有一个NavigationHelper,它负责用以下两种方法输出HTML。

注意:(这是一个简化的版本,因为在我的实现中,我使用Menu&the MenuItem的id来定位当前显示的菜单,并向其中添加“current”CSS类)

public static string DisplayMenu(this HtmlHelper helper, NavigationModel navigationMenu)
{ 
    public static string DisplayMenu(this HtmlHelper helper, NavigationModel navigationMenu)
    {            
        String result = "<ul id='main-nav'>\n";
        foreach(Menu menu in navigationMenu.Menus)
        {
            result +=     "<li>\n";
            result +=         string.Format("<a href='#'> {0} </a>\n",helper.AttributeEncode(menu.Name));
            result +=         "<ul>\n";
            foreach(MenuItem item in menu.MenuItems)
            {
                result += NavigationHelper.ConvertToItem(helper, item);
            }
            result +=         "</ul>\n";
            result +=     "</li>\n";
        }
        result +=     "</ul>\n";

        return result;
    }

    private static string ConvertToItem(this HtmlHelper helper,MenuItem item)
    {
        if (item.Show)
        {
            return string.Format("<li><a href='{0}'>{1}</a></li>\n", helper.AttributeEncode(item.Link), helper.AttributeEncode(item.Label));
        }
        else { return ""; }   
    }
}

<!-- Navigation -->
<%= Html.DisplayMenu(Model.NavigationMenu) %>

注意:我有一个类型为(BaseViewModel)的强类型母版页,它包含类型为NavigationModel的属性NavigationMenu

对我来说,我发现有一个强类型的母版页,使事情更容易和更干净。王尔德有一个很好的方法来实现他们在他的 GolfTracker Series