如何在ASP.NET MVC中直观地显示当前页面？
如何在ASP.NET MVC中直观地显示当前页面？
提问于 2009-09-24 12:25:20
作为讨论的基础。创建标准的ASP.NET MVC Web项目。
它将在母版页中包含两个菜单项：
<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的可视CSS样式。例如，当在About页面/控制器中时，我基本上想这样做：
<%= Html.ActionLink("About", "About", "Home", new {class="current"})%></li>当然，在主页上：
<%= Html.ActionLink("Home", "Index", "Home", new {class="current"})%></li>( CSS样式命名为current，该样式在菜单中直观地指示这是当前页面。)
我可以将母版页中的菜单div分解为内容占位符，但这意味着我必须将菜单放在每个页面上。
有什么好主意吗?有没有很好的解决方案？
回答 5
Stack Overflow用户
回答已采纳
发布于 2009-09-24 12:35:50
最简单的方法是从ViewContext的RouteData获取当前控制器和操作。注意签名的变化，并使用@对关键字进行转义。
<% 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，您可以将其与@Jon这样的HtmlHelper扩展结合起来，使其更简洁。
<%= Html.MenuLink( "About", "About", "Home", null, null, "current" ) %>MenuActionLink在哪里
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 );
}
}Stack Overflow用户
发布于 2009-09-24 13:50:59
我最近为此创建了一个HTML Helper，如下所示：
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);
}其实现如下所示：
<ul id="Navigation">
<%=Html.NavigationLink("/Path1", "Text1")%>
<%=Html.NavigationLink("/Path2", "Text2")%>
<%=Html.NavigationLink("/Path3", "Text3")%>
<%=Html.NavigationLink("/Path4", "Text4")%>
</ul>Stack Overflow用户
发布于 2011-06-30 02:06:17
如果您使用的是T4MVC，则可以使用以下命令：
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);
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/1471362
复制相关文章
相似问题