ASP.NET MVC 5 - Get current view's name (Razor .cshtml side)

Question

I am a student and quite new to ASP.NET MVC and I come from ASP.NET Web Form. (Used to it)

I got a list :

<ul class="sidebar bg-grayDark">     <li class="active">         <a href="@Url.Action("Index", "Home")">             <span class="mif-home icon"></span>             <span class="title">Home</span>         </a>     </li>     <li class="bg-hover-black">         <a href="@Url.Action("Index", "Product")">             <span class="mif-shop icon"></span>             <span class="title">Products</span>             <span class="counter">14</span>         </a>     </li>     <li class="bg-hover-black">         <a href="@Url.Action("Index", "Category")">             <span class="mif-flow-cascade icon"></span>             <span class="title">Categories</span>             <span class="counter">9</span>         </a>     </li>     <li class="bg-hover-black">         <a href="@Url.Action("Index", "User")">             <span class="mif-users icon"></span>             <span class="title">Users</span>             <span class="counter">1</span>         </a>     </li> </ul> 

My goal : By which view is rendered, I want to add "active" to the that has been clicked on. Example : I click on "Category", then Home loses his active class and Category has "active" added to his class. (and the reverse thing with "bg-hover-black")

I thought I could do it by checking the view actually rendered but I don't know how to do it. (I don't know how to check the actual view rendered, but using Razor to check conditions is okay)

I tried with JavaScript first :

     $(function () {         $('.sidebar').on('click', 'li', function () {             if (!$(this).hasClass('active')) {                 $('.sidebar li').removeClass('active');                 $(this).addClass('active');             }         })     })     

But it doesn't work because when the page loads, the html is re-rendered with "active" for the Home part. (If I remove "active" for Home, then nothing will be active onClick, except between click and page load).

Have you any solution ? I searched a lot on the web but found nothing to help me.

Sorry for any english mistakes, I'm still learning it :).

Thanks,

Hellcat8.

Answer 1

Since you are using the convention where your page is named after the controller you can do this in razor to get the controller/page name:

@{  var pageName = ViewContext.RouteData.Values["controller"].ToString(); }  <ul class="sidebar bg-grayDark">     <li class="@(pageName == "Home" ? "active" : "")">         <a href="@Url.Action("Index", "Home")">             <span class="mif-home icon"></span>             <span class="title">Home</span>         </a>     </li>     <li class="bg-hover-black @(pageName == "Product" ? "active" : "")">         <a href="@Url.Action("Index", "Product")">             <span class="mif-shop icon"></span>             <span class="title">Products</span>             <span class="counter">14</span>         </a>     </li>     <li class="bg-hover-black @(pageName == "Category" ? "active" : "")">         <a href="@Url.Action("Index", "Category")">             <span class="mif-flow-cascade icon"></span>             <span class="title">Categories</span>             <span class="counter">9</span>         </a>     </li>     <li class="bg-hover-black @(pageName == "User" ? "active" : "")">         <a href="@Url.Action("Index", "User")">             <span class="mif-users icon"></span>             <span class="title">Users</span>             <span class="counter">1</span>         </a>     </li> </ul> 

This will set your active class on the page server side removing the need to do this client side with javascript.

Answer 2

Here is my approach for a cascaded Bootstrap dropdown submenu, decorated with active classes in the _layout.cshtml file of a Razor Pages project.

Major elements of this solution:

• Get the current page route from ViewContext.RouteData.Values["page"].
• Use Anchor Tag Helpers instead of @Url.Action().

Code:

<ul class="nav navbar-nav">     @{         String pageRoute = ViewContext.RouteData.Values["page"].ToString();     }     <li class="dropdown @( pageRoute.Contains("/CustomerModel/") ? "active" : "" )">         <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Customer-Model <span class="caret"></span></a>         <ul class="dropdown-menu">             <li class="@( pageRoute.Contains("/Customers/") ? "active" : "" )"><a asp-page="/CustomerModel/Customers/Index">Customers</a></li>             <li class="@( pageRoute.Contains("/Partners/")  ? "active" : "" )"><a asp-page="/CustomerModel/CustomerPermissions/Index">CustomerPermissions</a></li>         </ul>     </li>     <li class="dropdown @( pageRoute.Contains("/StaffModel/") ? "active" : "" )">         <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Staff-Model <span class="caret"></span></a>         <ul class="dropdown-menu">             <li class="@( pageRoute.Contains("/Staff/")              ? "active" : "" )"><a asp-page="/StaffModel/Staff/Index">Staff</a></li>             <li class="@( pageRoute.Contains("/StaffGroups/")        ? "active" : "" )"><a asp-page="/StaffModel/StaffGroups/Index">StaffGroups</a></li>             <li class="@( pageRoute.Contains("/PermissionsGroups/")  ? "active" : "" )"><a asp-page="/StaffModel/PermissionsGroups/Index">PermissionsGroups</a></li>             <li class="@( pageRoute.Contains("/AllowedModules/")     ? "active" : "" )"><a asp-page="/StaffModel/AllowedModules/Index">AllowedModules</a></li>             <li class="@( pageRoute.Contains("/AllowedServices/")    ? "active" : "" )"><a asp-page="/StaffModel/AllowedServices/Index">AllowedServices</a></li>         </ul>     </li> </ul>