Bootstrap多级导航栏（级联导航）的实现代码
在bootstrap官⽅来说，导航最多就是两级，两级以上是⽆法实现的，⼤叔了⼀些第三⽅的资料，终于到⼀个不错的插件，使⽤上和效果上都还不错，现在和⼤家分享⼀下
先看⼀下，在后台系统上的显⽰效果
js导航栏下拉菜单下⾯说⼀下实现的⽅式
１.引⽤三个JS插件和⼀个CSS类库
1 2 3 4<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.插⼊对应的HTML代码块，本例⼦没有使⽤递归⽣成代码，使⽤了静态的三级结构，这样看着更清晰，真正的⽣产环境建议使⽤递归去⽣产菜单
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
38 39<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个图了，值得注意的是，如果希望每个菜单之间使⽤分割线，可以添加 <li class="divider"></li>这⾏代码。
下⾯给⼤家推荐⼀段代码有关Bootstrap多级级联菜单
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62<div class="nav
bar 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>
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127<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>
129 130 131 132 133 134 135 136 137</ul>
</li>
<li class="dropdown"> <a href="#">Menu</a> </li>
<li class="dropdown"> <a href="#">Menu</a> </li>
</ul>
以上所述是给⼤家介绍的Bootstrap多级导航栏(级联导航)的实现代码，希望对⼤家有所帮助！
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