MVC 5 @Html.ActionLink

Question

I'm having some issues with some data filtering ; I want, from the following dropdown menu, to be able to display a list of projects by approval or not.

When the user creates a new project one of the fields is "approved", which is a boolean. That checkbox is left not checked and when the project has a Go the user picks that checkbox as an approved project.

Basically, I want, when the user picks the option "Approved", to be redirected to the list of already approved projects.

How can I do that?

           <li class="dropdown">
                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Project Execution <span class="caret"></span></a>
                <ul class="dropdown-menu">
                <li> @Html.ActionLink("Approved", "Index", "NEWPROJECTs")</li>                    
                <li role="separator" class="divider"></li>
                <li>@Html.ActionLink("On Going", "Index", "NEWPROJECTs")</li>
                <li role="separator" class="divider"></li>
                <li>@Html.ActionLink("List", "Index", "PROJECTEXECUTIONs")</li>
            </ul>
            

Answer 1

Using Route Parameters

If you have a single controller action that handles one or more of these operations, then you'll likely need to supply a route value to determine what data you should be filtering by:

public ActionResult NewProjects(string filter)
{
     // Check the filter that was used and filter the content that you
     // will pass to the view accordingly

     // Get your projects prior to filtering
     var projects = _context.Projects;

     switch (filter)
     {
         case "ONGOING":
             projects = projects.Where(p => p.Status == "ONGOING");
         break;       
         default:
             projects = projects.Where(p => p.Status == "APPROVED");
         break;
     }

     return View(projects);
}

Then when you build your Action Links, simply specify the filter as a route value so that your controller action can consume it and properly filter your data:

<li>
    @Html.ActionLink("Approved", "Index", "NEWPROJECTs", new { filter = "APPROVED"})
</li>                    
<li role="separator" class="divider"></li>
<li>
    @Html.ActionLink("On Going", "Index", "NEWPROJECTs", new { filter = "ONGOING"})
</li>