ActionLink throws HTTP 404.0 – Not Found error // ASP.NET MVC

Question

I've got an issue with passing name of clicked ActionLink to controller and using it. 404 error appears when click. This is part of my view called Scan.cshtml

<tbody >
                @foreach (string item in ViewBag.files)
                {
                    <tr>
                        <td class=" row col-md-12 "> @Html.ActionLink(item, "Download", "Scan", new { id = item }, new { style = "color: #424242" })</td>
                    </tr>
                }
            </tbody>

This is the part from ScanController where am I trying to operate with sent data. I think it doesn't get to the controller logic at all and throws error sooner.

    public ActionResult Download(string id)
    {
        // controller logic for downloading file
        var ftpko = new MyProject.Helpers.ftp(@path, name, passwd);
        ftpko.download(id, "~/Dotazniky/dotaznik.jpg"); 

        return View();
    }

Let's say item = "car.jpg", error says requested path - http://localhost:53593/Scan/Download/car.jpg not found.

This is the RouteConfig file:

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }
}

Answer 1

The problem is that you ending your url name with .jpg , and the request is going to search for a Content file, not to execute an Action.

There are ways to disable this, but i think the most easy solution is to send name and extension in separate parameters.

Action become:

public ActionResult Download(string name, string ext)
{ 
     string id = name + "." + ext;

Add a new route

routes.MapRoute(
        name: "TwoParameters",
        url: "{controller}/{action}/{name}/{ext}",
        defaults: new { controller = "Home", action = "Index"}
    );

Modify the ActionLink

@{ var params = item.Split('.'); }
@Html.ActionLink(item, "Download", "Scan", new { name = params[0], ext = params[1] }, new { style = "color: #424242" })

Notes: There are other ways (others than .Split('.') ) to take extension and the filename.