MVC 与 Bootstrap 导航栏 - 将所选项目设置为活动 [英] MVC with Bootstrap Navbar - Set Selected Item to Active

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本文介绍了MVC 与 Bootstrap 导航栏 - 将所选项目设置为活动的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在学习 Bootstrap，但无法使所选项目进入活动"状态.活动状态保持在默认项目上.新选择/点击的项目会短暂变为活动状态，但又会恢复原状.我已阅读所有帖子，但仍然无法使此代码正常工作.我使用的是 MVC5 和 JQuery 2.1.

如果我将 li 的 hrefs 更改为 href="#"，则活动类将被正确应用.加载新视图时会发生什么?我认为 Sebastian 的回应很接近，但对 Areas 变得混乱.

标记

<div class="容器"><div class="navbar navbar-inverse navbar-fixed-top"><div class="navbar-header"><a class="navbar-toggle" data-toggle="collapse" data-target=".nav-collapse"><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></a><a class="navbar-brand" href="#">Test</a>
<div class="btn-group pull-right"><a class="btn dropdown-toggle" data-toggle="dropdown" href="#"><i class="icon-user"></i>登录<span class="caret"></span></a><ul class="下拉菜单"><li><a href="#">个人资料</a></li><li class="divider"></li><li><a href="#">退出</a></li>

<div class="navbar-collapse collapse"><ul class="nav navbar-nav"><li class="active"><a href="~/Home">Home</a></li><li><a href="~/Home/About">关于</a></li><li><a href="~/Student">学生样本</a></li><li class="下拉菜单"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a><ul class="下拉菜单"><li><a href="~/Admin/Home/Index"">Admin</a></li><li><a href="#">另一个动作</a></li><li><a href="#">这里还有别的东西</a></li><li class="divider"></li><li><a href="#">分隔链接</a></li><li><a href="#">一个单独的链接</a></li>

<!--/容器-->

<!--/navbar 包装器 -->

脚本

这是我在已发布的答案和一些研究的帮助下最终完成的工作.

public static string MakeActive(this UrlHelper urlHelper,string action, string controller, string area = ""){字符串结果 =活动"；字符串 requestContextRoute;字符串passedInRoute;//从请求中获取路由值var sb = new StringBuilder().Append(urlHelper.RequestContext.RouteData.DataTokens["area"]);sb.Append("/");sb.Append(urlHelper.RequestContext.RouteData.Values["controller"].ToString());sb.Append("/");sb.Append(urlHelper.RequestContext.RouteData.Values["action"].ToString());requestContextRoute = sb.ToString();if (string.IsNullOrWhiteSpace(area)){passedInRoute = "/" + 控制器 + "/" + 动作；}别的{passInRoute = 区域 + "/" + 控制器 + "/" + 动作；}//两条路线一样吗?if (!requestContextRoute.Equals(passedInRoute, StringComparison.OrdinalIgnoreCase)){结果 = 空；}返回结果；}

解决方案

您必须检查控制器或根据当前 url 查看哪个菜单项处于活动状态:

我有一个类似这样的扩展方法:

public static string MakeActiveClass(this UrlHelper urlHelper, string controller){字符串结果 =活动"；string controllerName = urlHelper.RequestContext.RouteData.Values["controller"].ToString();if (!controllerName.Equals(controller, StringComparison.OrdinalIgnoreCase)){结果 = 空；}返回结果；}

您可以像这样在视图中使用它:

<!-- 当前控制器等于blog"时激活列表项--><li class="@Url.MakeActive("blog")"><a href="@Url.Action("index", "blog")">....</a>

I'm learning Bootstrap and can't get the selected item into an "active" state. The active state remains on the default item. The newly selected/clicked item changes to active briefly, but reverts back. I've read all the posts and still can't get this code to work. I'm using MVC5 and JQuery 2.1.

EDIT: If I change the li's hrefs to href="#", then the active class gets applied properly. What's happening when a new view gets loaded? I think Sebastian's response is close, but gets messy with Areas.

Markup

<div class="navbar-wrapper">
    <div class="container">
        <div class="navbar navbar-inverse navbar-fixed-top">

            <div class="navbar-header">
                <a class="navbar-toggle" data-toggle="collapse" data-target=".nav-collapse">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </a>
                <a class="navbar-brand" href="#">Test</a>
            </div>
            <div class="btn-group pull-right">
                <a class="btn dropdown-toggle" data-toggle="dropdown" href="#">
                    <i class="icon-user"></i>Login
          <span class="caret"></span>
                </a>
                <ul class="dropdown-menu">
                    <li><a href="#">Profile</a></li>
                    <li class="divider"></li>
                    <li><a href="#">Sign Out</a></li>
                </ul>
            </div>
            <div class="navbar-collapse collapse">
                <ul class="nav navbar-nav">
                    <li class="active"><a href="~/Home">Home</a></li>
                    <li><a href="~/Home/About">About</a></li>
                    <li><a href="~/Student">Students Sample</a></li>
                    <li class="dropdown">
                        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                        <ul class="dropdown-menu">
                            <li><a href="~/Admin/Home/Index"">Admin</a></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>
                            <li><a href="#">One more separated link</a></li>
                        </ul>
                    </li>
                </ul>
            </div>

        </div>
    </div>
    <!-- /container -->
</div>
<!-- /navbar wrapper -->

Script

<script type="text/javascript">

    $(function () {
        $('.navbar-nav li').click(function () {
            $(this).addClass('active').siblings().removeClass('active');
        });
    });

</script>

EDIT: Here's what I ended up doing with the help of the posted answers and some research.

public static string MakeActive(this UrlHelper urlHelper,string action, string controller, string area = "")
        {
            string result = "active";
            string requestContextRoute;
            string passedInRoute;

            // Get the route values from the request           
            var sb = new StringBuilder().Append(urlHelper.RequestContext.RouteData.DataTokens["area"]);
            sb.Append("/");
            sb.Append(urlHelper.RequestContext.RouteData.Values["controller"].ToString());
            sb.Append("/");
            sb.Append(urlHelper.RequestContext.RouteData.Values["action"].ToString());
            requestContextRoute = sb.ToString();

            if (string.IsNullOrWhiteSpace(area))
            {
                passedInRoute = "/" + controller + "/" + action;
            }
            else
            {
                passedInRoute = area + "/" + controller + "/" + action;
            }

            //  Are the 2 routes the same?
            if (!requestContextRoute.Equals(passedInRoute, StringComparison.OrdinalIgnoreCase))
            {
                result = null;
            }

            return result;
        }

解决方案

You have to check in your controller or view which menu item is active based on the current url:

I have an extension method similar to this:

public static string MakeActiveClass(this UrlHelper urlHelper, string controller)
{
    string result = "active";

    string controllerName = urlHelper.RequestContext.RouteData.Values["controller"].ToString();

    if (!controllerName.Equals(controller, StringComparison.OrdinalIgnoreCase))
    {
        result = null;
    }

    return result;
}

You can use it in your view like this:

<!-- Make the list item active when the current controller is equal to "blog" -->
<li class="@Url.MakeActive("blog")">
   <a href="@Url.Action("index", "blog")">....</a>
</li>

这篇关于MVC 与 Bootstrap 导航栏 - 将所选项目设置为活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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