如何在视觉上指示在ASP.NET MVC当前页面?(How to visually indicate

2019-07-19 07:56发布

作为讨论的基础。 创建一个标准的ASP.NET MVC Web项目。

它将包含在母版页两个菜单项:

<div id="menucontainer">
  <ul id="menu">
    <li>
      <%= Html.ActionLink("Home", "Index", "Home")%></li>
    <li>
      <%= Html.ActionLink("About", "About", "Home")%></li>
  </ul>
</div>

如何设置指示当前页面的可视化CSS样式。 例如,在关于页/控制器的时候,我基本上是想做到这一点:

<%= Html.ActionLink("About", "About", "Home", new {class="current"})%></li>

而且,当然,在主页上:

<%= Html.ActionLink("Home", "Index", "Home", new {class="current"})%></li>

(有一个CSS样式名目前在视觉上表示的菜单,这是当前页。)

我可能爆发从母版页菜单DIV到内容占位符,但是这将意味着我必须把菜单的每个页面上。

任何想法,有没有一个很好的解决方案呢?

Answer 1:

最简单的方法是让从ViewContext的的RouteData电流控制器和行动。 注意签名的变化,并使用@逃脱的关键字。

<% var controller = ViewContext.RouteData.Values["controller"] as string ?? "Home";
   var action = ViewContext.RouteData.Values["action"] as string ?? "Index";
   var page = (controller + ":" + action).ToLower();
 %>

<%= Html.ActionLink( "About", "About", "Home", null,
                     new { @class = page == "home:about" ? "current" : "" ) %>
<%= Html.ActionLink( "Home", "Index", "Home", null,
                     new { @class = page == "home:index" ? "current" : "" ) %>

请注意,您可以结合这一个的HtmlHelper扩展如@乔恩的,并使其更清洁。

<%= Html.MenuLink( "About", "About", "Home", null, null, "current" ) %>

其中MenuActionLink是

public static class MenuHelperExtensions
{
     public static string MenuLink( this HtmlHelper helper,
                                    string text,
                                    string action,
                                    string controller,
                                    object routeValues,
                                    object htmlAttributes,
                                    string currentClass )
     {
         RouteValueDictionary attributes = new RouteValueDictionary( htmlAttributes );
         string currentController = helper.ViewContext.RouteData.Values["controller"] as string ?? "home";
         string currentAction = helper.ViewContext.RouteData.Values["action"] as string ?? "index";
         string page = string.Format( "{0}:{1}", currentController, currentAction ).ToLower();
         string thisPage = string.Format( "{0}:{1}", controller, action ).ToLower();
         attributes["class"] = (page == thisPage) ? currentClass : "";
        return helper.ActionLink( text, action, controller, new RouteValueDictionary( routeValues ), attributes );
     }
}


Answer 2:

我最近创建的HTML助手这个看起来像:

public static string NavigationLink(this HtmlHelper helper, string path, string text)
{
    string cssClass = String.Empty;
    if (HttpContext.Current.Request.Path.IndexOf(path) != -1)
    {
        cssClass = "class = 'selected'";
    }

    return String.Format(@"<li><a href='{0}' {1}>{2}</a></li>", path, cssClass, text);
}

实施看起来是这样的:

  <ul id="Navigation">
  <%=Html.NavigationLink("/Path1", "Text1")%>
  <%=Html.NavigationLink("/Path2", "Text2")%>
  <%=Html.NavigationLink("/Path3", "Text3")%>
  <%=Html.NavigationLink("/Path4", "Text4")%>
  </ul>


Answer 3:

如果你正在使用T4MVC,您可以使用此:

        public static HtmlString MenuLink(
        this HtmlHelper helper,
        string text,
        IT4MVCActionResult action,
        object htmlAttributes = null)
    {
        var currentController = helper.ViewContext.RouteData.Values["controller"] as string ?? "home";
        var currentAction = helper.ViewContext.RouteData.Values["action"] as string ?? "index";

        var attributes = new RouteValueDictionary(htmlAttributes);
        var cssClass = (attributes.ContainsKey("class"))
                           ? attributes["class"] + " "
                           : string.Empty;

        string selectedClass;
        if(action.Controller.Equals(currentController, StringComparison.InvariantCultureIgnoreCase)
        {
            selectedClass = "selected-parent";
            if(action.Action.Equals(currentAction, StringComparison.InvariantCultureIgnoreCase))
                selectedClass = "selected";
        }
        cssClass += selectedClass;

        attributes["class"] = cssClass;

        return helper.ActionLink(text, (ActionResult)action, attributes);
    }


Answer 4:

这可能只是它的第五个参数,所以你的HTML属性角子空。 这里这篇文章描述它是这样,但你可以在四号arguement一些东西通过,第5是专门针对HTMLattributes



Answer 5:

<script type="javascript/text">
$( document ).ready( function() {

        @if (Request.Url.AbsolutePath.ToLower() == "/") 
        {
            @Html.Raw("$('.navbar-nav li').eq(0).attr('class','active');")
        }

        @if (Request.Url.AbsolutePath.ToLower().Contains("details")) 
        {
            @Html.Raw("$('.navbar-nav li').eq(1).attr('class','active');")
        }

        @if (Request.Url.AbsolutePath.ToLower().Contains("schedule")) 
        {
            @Html.Raw("$('.navbar-nav li').eq(2).attr('class','active');")
        }

    });
</script>

在5分钟一起打发这一点,我大概可以重构它,但应该给你的基本概念,它可能是小网站最有用的。



文章来源: How to visually indicate current page in ASP.NET MVC?