是否有可折叠(多级)Bootstrap 3菜单的简单MVC4 html助手？
ElH*_*aix 2 view-helpers c#-4.0 asp.net-mvc-4 twitter-bootstrap
我已经看到了几个关于为active菜单项创建HTML帮助器方法的示例.
**Summary:** 简单地说,在一个MVC项目中,使用Twitter Bootstrap,我试图在选择一个孩子时保持可折叠菜单的打开状态.
我正在使用可折叠菜单,active open如果选择了孩子,则需要包含父母的css(所选项目).这将确保菜单在正确的位置打开.通过使用另一个HTML帮助程序,活动项已设置为active.
菜单的HTML:
<div id="sidebar">
<ul>
<li class="active"><a href="dashboard.html"><i class="icon-home"></i> <span>Dashboard</span></a></li>
<li class="submenu">
<a href="#"><i class="icon-beaker"></i> <span>UI Lab</span> <i class="arrow icon-chevron-right"></i></a>
<ul>
<li><a href="interface.html">Interface Elements</a></li>
<li><a href="jquery-ui.html">jQuery UI</a></li>
<li><a href="buttons.html">Buttons & icons</a></li>
</ul>
</li>
<li class="submenu">
<a href="#"><i class="icon-th-list"></i> <span>Form elements</span> <i class="arrow icon-chevron-right"></i></a>
<ul>
<li><a href="form-common.html">Common elements</a></li>
<li><a href="form-validation.html">Validation</a></li>
<li><a href="form-wizard.html">Wizard</a></li>
</ul>
</li>
<li><a href="tables.html"><i class="icon-th"></i> <span>Tables</span></a></li>
<li><a href="grid.html"><i class="icon-th-list"></i> <span>Grid Layout</span></a></li>
<li class="submenu">
<a href="#"><i class="icon-file"></i> <span>Sample pages</span> <i class="arrow icon-chevron-right"></i></a>
<ul>
<li><a href="invoice.html">Invoice</a></li>
<li><a href="chat.html">Support chat</a></li>
<li><a href="calendar.html">Calendar</a></li>
<li><a href="gallery.html">Gallery</a></li>
<li><a href="messages.html">Messages</a></li>
</ul>
</li>
<li>
<a href="charts.html"><i class="icon-signal"></i> <span>Charts & graphs</span></a>
</li>
<li>
<a href="widgets.html"><i class="icon-inbox"></i> <span>Widgets</span></a>
</li>
</ul>
</div>
这是项目的辅助方法:
public static MvcHtmlString MenuItem(this HtmlHelper htmlHelper,
string text,
string action,
string controller,
string iconClass)
{
var li = new TagBuilder("li");
var routeData = htmlHelper.ViewContext.RouteData;
var currentAction = routeData.GetRequiredString("action");
var currentController = routeData.GetRequiredString("controller");
if (string.Equals(currentAction, action, StringComparison.OrdinalIgnoreCase) &&
string.Equals(currentController, controller, StringComparison.OrdinalIgnoreCase))
{
li.AddCssClass("active");
}
var i = new TagBuilder("i");
i.AddCssClass(iconClass);
var basePath = HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority);
//li.InnerHtml = htmlHelper.ActionLink("<i>something</i>" + text, action, controller).ToHtmlString();
li.InnerHtml = htmlHelper.Raw(string.Format("<a href=\"{0}/{1}/{2}\"><i class=\"{4}\"></i>{3}</a>", basePath, controller, action, text, iconClass)).ToString();
return MvcHtmlString.Create(li.ToString());
}
并实现如下:
<div id="sidebar">
<ul>
@Html.MenuItem("Dashboard", "Index", "Dashboard", "icon-home")
@* <li class="active"><a href="dashboard.html"><i class="icon-home"></i> <span>Dashboard</span></a></li>*@
<li class="submenu">
<a href="#"><i class="icon-beaker"></i> <span>UI Lab</span> <i class="arrow icon-chevron-right"></i></a>
<ul>
<li>@Html.MenuItem("Websites", "Index", "Websites", null)</li>
<li><a href="jquery-ui.html">jQuery UI</a></li>
<li><a href="buttons.html">Buttons & icons</a></li>
</ul>
</li>
<li class="submenu">
<a href="#"><i class="icon-th-list"></i> <span>Form elements</span> <i class="arrow icon-chevron-right"></i></a>
<ul>
<li><a href="form-common.html">Common elements</a></li>
<li><a href="form-validation.html">Validation</a></li>
<li><a href="form-wizard.html">Wizard</a></li>
</ul>
</li>
所以我没有的是子菜单项.
有没有更简单的方法来实现这一目标？
--UPDATE--
我猜这个把它放到局部视图中可能是最好的.我需要找到一些方法来保存所选项目的点击以在每个菜单项上引用它,而不是检查控制器/操作是否匹配,以便将当前项目设置为"活动".在点击时激活的控制器方法,检查当前所选项目是父项还是子项,如果父项与子项匹配,则格式不同？我敢肯定必须有一个更简单的方法.
好的,所以这是我提出的一个解决方案.
回顾一下,这并不像在项目中选择"活动"CSS类一样简单(根据默认的Bootstrap MVC.在此解决方案中,我们需要识别父项和子项并识别它们.
默认页面是仪表板.然后,用户单击"配置"以展开菜单,然后选择打开页面的"网站"链接.
这是解决方案:
模型:
public class NavigationMenu
{
public string Text { get; set; }
public string Action { get; set; }
public string Controller { get; set; }
public string Icon { get; set; }
public bool Selected { get; set; }
public List<NavigationMenu> MenuChildren;
}
控制器:
public class NavigationController : Controller
{
[ChildActionOnly]
public ActionResult GenerateMenu()
{
List<NavigationMenu> menuItems = new List<NavigationMenu>();
// build the menu
menuItems.Add(new NavigationMenu
{
Text = "Dashboard",
Action = "",
Controller = "Dashboard",
Icon = "icon-home",
Selected = true, // default selected menu item
MenuChildren = null
});
menuItems.Add(new NavigationMenu
{
Text = "Configuration",
Action = null,
Controller = null,
Icon = "icon-cog",
MenuChildren = new List<NavigationMenu>{
new NavigationMenu{
Text = "Websites",
Action = "",
Controller = "Websites",
Icon = null,
MenuChildren = null
},
new NavigationMenu{
Text = "Child 2",
Action = null,
Controller = null,
Icon = null,
MenuChildren = null
}
}
});
menuItems.Add(new NavigationMenu
{
Text = "Item 2",
Action = "",
Controller = "Item2",
Icon = "icon-random",
MenuChildren = null
});
menuItems.Add(new NavigationMenu
{
Text = "Item 3",
Action = "",
Controller = "Item3",
Icon = "icon-certificate",
MenuChildren = null
});
string action = ControllerContext.ParentActionViewContext.RouteData.Values["action"].ToString() == "Index" ? "" : ControllerContext.ParentActionViewContext.RouteData.Values["action"].ToString();
string controller = ControllerContext.ParentActionViewContext.RouteData.Values["controller"].ToString();
foreach (var item in menuItems)
{
if (item.MenuChildren != null)
{
foreach (var cItem in item.MenuChildren)
{
if (cItem.Controller == controller && cItem.Action == action)
{
cItem.Selected = true;
break;
}
else
{
cItem.Selected = false;
}
}
}
if (item.Controller == controller && item.Action == action)
{
item.Selected = true;
break;
}
else
{
item.Selected = false;
}
}
return PartialView("~/Views/Shared/_Navigation.cshtml", menuItems);
}
}
共享视图:
@model IEnumerable<AdminWebsite.Models.NavigationMenu>
@{
var basePath = HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority);
}
<div id="sidebar">
@Html.Raw("<ul>")
@foreach (var item in Model)
{
// if the menu item does not have children then it should be clickable
if (item.MenuChildren == null & item.Selected)
{
<li class="active"><a href="@String.Format("{0}/{1}/{2}", basePath, item.Controller, item.Action)"><i class="@item.Icon"></i> <span>@item.Text</span></a></li>
}
else if (item.MenuChildren == null & !item.Selected)
{
<li><a href="@String.Format("{0}/{1}/{2}", basePath, item.Controller, item.Action)"><i class="@item.Icon"></i> <span>@item.Text</span></a></li>
}
// has children and one of its children is selected
if (item.MenuChildren != null)
{
if (item.MenuChildren.Any(c => c.Selected) == true)
{
<text><li class="submenu active open"></text>
}
else
{
<text><li class="submenu"></text>
}
// sub-menu parent
if (item.MenuChildren != null & item.Selected)
{
<a href="@String.Format("{0}/{1}/{2}", basePath, item.Action, item.Controller)"><i class="@item.Icon"></i> <span>@item.Text</span></a>
}
else if (item.MenuChildren != null & !item.Selected)
{
<a href="@String.Format("{0}/{1}/{2}", basePath, item.Action, item.Controller)"><i class="@item.Icon"></i> <span>@item.Text</span></a>
}
// children
<text><ul></text>
// iterate through children
foreach(var cItem in item.MenuChildren)
{
if (cItem.MenuChildren == null & cItem.Selected)
{
<li class="active"><a href="@String.Format("{0}/{1}/{2}", basePath, cItem.Controller, cItem.Action)"><i class="@cItem.Icon"></i> <span>@cItem.Text</span></a></li>
}
else if (cItem.MenuChildren == null & !cItem.Selected)
{
<li><a href="@String.Format("{0}/{1}/{2}", basePath, cItem.Controller, cItem.Action)"><i class="@cItem.Icon"></i> <span>@cItem.Text</span></a></li>
}
}
@Html.Raw("</ul>");
@Html.Raw("</li>");
}
}
@Html.Raw("</ul>")
</div>
在视图中实现:
@{Html.RenderAction("GenerateMenu", "Navigation");}
控制器检查菜单上的当前操作/控制器名称是否匹配,如果是,则设置selected = true.在局部视图中,存在一些基于父/子关系确定显示结构的逻辑,并且如果选择了子,则父级也是如此.
简而言之,就是这样.我想听一些评论/其他例子.
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