C3rd

HowTo: Access Controller method/function from a View
Posted: 20 Dec 2012, 11:32am - Thursday

I've been wondering how to access the controller method/function from a View. I found a solution from Jeffrey Palermo which he explain it in details. Though, my case that I want to happen is about random numbers. Controller Codes: 

        public ActionResult Welcome(string name, int num = 1)
        {
            ViewBag.Message = "Hello " + name;
            ViewBag.Num = num;
            ViewBag.GetRandom = new Func<int, int, int>(getRandomNumber);

            return View();
        }

        private int getRandomNumber(int min, int max)
        {
            Random rand = new Random();
            return rand.Next(min, max);
        }
View Codes: 
<ul>
    @for (int i = 0; i < ViewBag.GetRandom(3, 100); i++)
    {
        <li>@ViewBag.Message</li>
    }
</ul>
or... 
@{ ViewBag.Num = ViewBag.GetRandom(3, 100); }

<h2>Welcome</h2>
Generated Random Number: @ViewBag.Num
<ul>
    @for (int i = 0; i < ViewBag.Num; i++)
    {
        <li>@ViewBag.Message</li>
    }
</ul>
One thing that confusing about this sample codes is; During the method declaration from the Controller, you use the new Func<>(method_name) -- the first int from <> is the minimum value, 2nd int is the maximum value and the third value is the return value.

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