“if” considered harmful in ASP.NET MVC View (.aspx) files?

Question

I remember seeing a blog (or something) that said you should not use <% if ... %> in .aspx files in ASP.NET MVC, but I can\'t remember what it said the alternative is. Can a

Answer 1

As i think the best approach for this is try to handle your if condition in controller and pass the specific view for required result or pass the View name in a variable to render.

public class HomeController :Controller
{
    public ActionResult Category(string? category)
    {
       View viewToReturn;
       if (category == null)
          viewToReturn = View("CategoryList", repo.GetAllCategory); /// it is a View
       else
          viewToReturn = View("Category", repo.GetCategory(category)); /// it is a View

       return viewToReturn;
    }
}

Well, Martin answer is also from best practices.