C# – Putting HTML inside Html.ActionLink(), plus No Link Text

There are overloads of ActionLink which take a fragment parameter. Passing "section12" as your fragment will get you the behavior you're after.

For example, calling LinkExtensions.ActionLink Method (HtmlHelper, String, String, String, String, String, String, Object, Object):

<%= Html.ActionLink("Link Text", "Action", "Controller", null, null, "section12-the-anchor", new { categoryid = "blah"}, null) %>

I think you need to handle an instance of yoursite.com/Tags/, as you're only handling one with a tag in.

I would create another route:

routes.MapRoute(
  "TagsIndex", //Called something different to prevent a conflict with your other route
  "Tags/",
  new { controller = "Tags", action = "Index" }
);

routes.MapRoute(
  "Tags",
  "Tags/{tag}",
  new { controller = "Tags", action = "Tag", tag = "" }
);


/* In your controller */
public ActionResult Index() // You could add in the id, if you're doing paging here
{
  return View("All", model);
}

public ActionResult Tag(string tag, int? id)
{
  if (string.IsNullOrEmpty(tag))
  {
    return RedirectToAction("Index");
  }

  return View("Details", model);
}