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在bootstrap官方來說，導航最多就是兩級，兩級以上是無法實現的，大叔找了一些第三方的資料，終于找到一個不錯的插件，使用上和效果上都還不錯，現在和大家分享一下

先看一下，在后臺系統上的顯示效果

下面說一下實現的方式

１.引用三個JS插件和一個CSS類庫

<script src="~/Content/bootstraps/JS/bootstrap-submenu.js"></script>

<script src="~/Content/bootstraps/JS/highlight.min.js"></script>

<script src="~/Content/bootstraps/JS/docs.js"></script>

<link href="~/Content/bootstraps/CSS/bootstrap-submenu.css" rel="stylesheet" />

２.插入對應的HTML代碼塊,本例子沒有使用遞歸生成代碼，使用了靜態的三級結構，這樣看著更清晰，真正的生產環境建議使用遞歸去生產菜單

<ul class="nav nav-pills">

@foreach (var item in Model)

{

if (item.Sons != null && item.Sons.Count > 0)

{

<li class="dropdown">

<a data-submenu="" data-toggle="dropdown" tabindex="0">@item.MenuName<span class="caret"></span></a>

<ul class="dropdown-menu">

@foreach (var sub in item.Sons)

{

if (sub.Sons != null && item.Sons.Count > 0)

{

<li class="dropdown-submenu">

<a tabindex="0">@sub.MenuName</a>

<ul class="dropdown-menu">

@foreach (var inner in sub.Sons)

{

<li>

<a href="@inner.LinkUrl">@inner.MenuName</a>

</li>

}

</ul>

</li>

<li class="divider"></li>

}

else

{

<li><a href="@sub.LinkUrl">@sub.MenuName</a></li>

}

}

</ul>

</li>

}

else

{

<li><a href="@item.LinkUrl">@item.MenuName</a></li>

}

}

</ul>

最后的效果就是第一個圖了，值得注意的是，如果希望每個菜單之間使用分割線，可以添加 <li class="divider"></li>這行代碼。

下面給大家推薦一段代碼有關Bootstrap多級級聯菜單

<div class="navbar navbar-fixed-top">

<div class="navbar-inner">

<div class="container-fluid">

<a data-target=".nav-collapse" data-toggle="collapse" class="btn btn-navbar">

<span class="icon-bar"></span>

<span class="icon-bar"></span>

<span class="icon-bar"></span>

</a>

<a href="#" class="brand">Project name</a>

<div class="nav-collapse">

<ul class="nav">

<li class="active">

<a href="#">Home</a>

</li>

<li>

<a href="#">Link</a>

</li>

<li>

<a href="#">Link</a>

</li>

<li>

<a href="#">Link</a>

</li>

<li class="dropdown">

<a data-toggle="dropdown" class="dropdown-toggle" href="#">

Dropdown

<b class="caret"></b>

</a>

<ul class="dropdown-menu">

<li class="dropdown-submenu">

<a href="#">More options</a>

<ul class="dropdown-menu">

<li>

<a href="#">Second level link</a>

</li>

<li>

<a href="#">Second level link</a>

</li>

<li>

<a href="#">Second level link</a>

</li>

<li>

<a href="#">Second level link</a>

</li>

<li class="dropdown-submenu">

<a href="#">Second level link</a>

<ul class="dropdown-menu">

<li>

<a href="#">3333333333</a>

</li>

</ul>

</li>

</ul>

</li>

<li>

<a href="#">Another action</a>

</li>

<li>

<a href="#">Something else here</a>

</li>

<li class="divider"></li>

<li class="nav-header">Nav header</li>

<li>

<a href="#">Separated link</a>

</li>

<li>

<a href="#">One more separated link</a>

</li>

</ul>

</li>

</ul>

<form action="" class="navbar-search pull-left">

<input type="text" placeholder="Search" class="search-query span2">

</form>

<ul class="nav pull-right">

<li>

<a href="#">Link</a>

</li>

<li class="divider-vertical"></li>

<li class="dropdown">

<a class="#" href="#">Menu</a>

</li>

</ul>

</div><!-- /.nav-collapse -->

</div>

</div>

</div>

<hr />

<ul class="nav nav-pills">

<li class="active">

<a href="#">Regular link</a>

</li>

<li class="dropdown">

<a href="#" data-toggle="dropdown" class="dropdown-toggle">

Dropdown

<b class="caret"></b>

</a>

<ul class="dropdown-menu" id="menu1">

<li class="dropdown-submenu">

<a href="#">More options</a>

<ul class="dropdown-menu">

<li>

<a href="#">Second level link</a>

</li>

<li>

<a href="#">Second level link</a>

</li>

<li>

<a href="#">Second level link</a>

</li>

<li>

<a href="#">Second level link</a>

</li>

<li>

<a href="#">Second level link</a>

</li>

</ul>

</li>

<li>

<a href="#">Another action</a>

</li>

<li>

<a href="#">Something else here</a>

</li>

<li class="divider"></li>

<li>

<a href="#">Separated link</a>

</li>

</ul>

</li>

<li class="dropdown">

<a href="#">Menu</a>

</li>

<li class="dropdown">

<a href="#">Menu</a>

</li>

</ul>

以上所述是小編給大家介紹的Bootstrap多級導航欄(級聯導航)的實現代碼，希望對大家有所幫助！