Using ViewData to pass data from Controller to View

Asked 15/5, 2015 at 12:45 Answered 15/5, 2015 at 13:22

I'm trying to pass data from a controller to view, and display these data. But after many tries I can't.

Controller code :

public ActionResult ValidSearch(ProductSearchParam gp)
{

    if (gp.IsCandidate)
    {
        ViewBag.abc="bob";
        List<ProductCandidate> prodClist = new List<ProductCandidate>();
        prodClist = Pcs.SearchParam(gp,0,100);
        ViewBag.total = prodClist.Count;
        return View("ValidSearchCandidate", prodClist);
    }
    else
    {
        List<Product> prodlist = new List<Product>();
        prodlist = Ps.SearchParam(gp,0,100);
        ViewBag.total = prodlist.Count;
        return View("ValidSearch", prodlist);
    }

    //return View();
}

View code :

<body>
    <div>

        <p>Bonjour @ViewBag.abc</p>

I've even try TempData or ViewBag, unsuccessfully.

I do not understand why the value is not getting passed to the View correctly Can someone help me to solve this ?

Cullen answered 15/5, 2015 at 12:45 Comment(2)

TempData is not ViewData! Show how you have tried to access the ViewData property – Furlough 15/5, 2015 at 12:48

Sorry about my mistake, i've tried it correctly anyway and it don't work. – Cullen 15/5, 2015 at 12:56

Since you have set some property on the ViewData on the Controller, you will have it available on the ViewData on View. On the other hand, you have the TempData which is used when you need to transfer information between requests to another route (redirects to an action). For sample:

public ActionResult ValidSearch(ProductSearchParam gp)
{
   List<ProductCandidate> prodClist = new List<ProductCandidate>();

   ViewData["Nom"] = "bob";

   return View("ValidSearchCandidate", prodClist);
}

And in the view:

@ViewData["Nom"].ToString()

@foreach(var prod in  Model)
{
   <li>@prod.Name</li>
}

Seth answered 15/5, 2015 at 12:55 Comment(1)

Thank you for your response, i've tried your View code and ProductCandidate is a class i made, so it's "unfindable" in the View. – Cullen 15/5, 2015 at 13:4

You can use ViewBag for this

Controller :

ViewBag.name= "bob";

View :

 <p>Bonjour @ViewBag.name</p>

Beardsley answered 15/5, 2015 at 13:3 Comment(9)

Using .__ instead of ["__"] occurs an error in the Controller code. – Cullen 15/5, 2015 at 13:15

that is because you are using the keyword "try". – Beardsley 15/5, 2015 at 13:18

Please use ViewBag instead of ViewData – Beardsley 15/5, 2015 at 13:23

I think you are getting confused between ViewBag and ViewData, please make sure you are using the viewBag in controller as well as in view – Beardsley 15/5, 2015 at 13:25

My mistake, i juste copy paste a wrong line. But it do not works... I've already use ViewBags/Datas, i do not understand why it's not working... – Cullen 15/5, 2015 at 13:30

can you please share the exact code you are writing now? – Beardsley 15/5, 2015 at 13:31

I don't confuse, i'm using the same View"thing" in View and in Controller. – Cullen 15/5, 2015 at 13:35

If it is going in the if condition. then it must work. – Beardsley 15/5, 2015 at 13:43

I do not understand why but it don't ! – Cullen 15/5, 2015 at 13:51

In your example you've used ViewData in Controller and TempData in View

If you use ViewData["Nom"] in controller, you should use ViewData["Nom"] in view. Are you use that you are not misspelling the object?

Provender answered 15/5, 2015 at 12:49 Comment(5)

Excuse me i did it wrong in the example, anyway it don't work if ViewData is in Controller and View. – Cullen 15/5, 2015 at 12:55

Are you calling the ViewData inside the View or LayoutPage? – Provender 15/5, 2015 at 12:57

I do not really get your question, I'm calling the ViewData, on the Html (body) part of the View. – Cullen 15/5, 2015 at 13:0

Are you sure that your Action method is not returning before attribution of ViewData? If possible, post the full code of your action – Provender 15/5, 2015 at 13:5

As I can see, there are 2 views: ValidSearch and ValidSearchCandidate. The ViewData["try"] exists only when ValidSearchCandidate is the chosen one. Are you that you are putting the @ViewData["try"] inside the correct view? – Provender 15/5, 2015 at 13:17

Replace ViewBag["try"] to ViewData["try"] in your controller code.

And, In the else condition you have no any declaration of ViewData["try"] so may be you have to check the ViewData before using it on your view.

Doublure answered 15/5, 2015 at 13:22 Comment(0)

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