Pass a ViewBag instance to a HiddenFor field in Razor

Question

Using ASP.NET MVC and Razor, I'm trying to pass a ViewBag item from the controller to a HiddenFor field (using Razor). I get the following message: Extension methods cannot by dynamically dispatched.

  @Html.HiddenFor(m=>m.PortfolioId, ViewBag.PortfolioId);

Does you model have a property `PortfolioId`? I assume you do not understand `@Html.HiddenFor()` - the second parameter is for rendering the html attributes — , Dec 13 '14 at 08:39

score 24 · Answer 1 · edited Dec 13 '14 at 10:33

24

You are getting this error because ViewBag is dynamic type. You can use ViewModel instead of ViewBag to solve this problem.

Alternatively you can use following or plain html as suggested by iceburg:

@Html.Hidden("id", (string)ViewBag.PortfolioId)

edited Dec 13 '14 at 10:33

answered Dec 13 '14 at 10:13

Prakash

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here, the string "id" is used as the hidden inputs id and name attributes. – Mathemats Dec 02 '21 at 03:32

score 2 · Answer 2 · answered Dec 13 '14 at 08:42

2

I'm not sure how to do it with the helper but you can achieve the same markup useing plain html:

<input type="hidden" name="PortfolioId" id="PortfolioId" value="@ViewBag.PortfolioId" />

answered Dec 13 '14 at 08:42

iceburg

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score 2 · Answer 3 · edited Dec 07 '20 at 13:03

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@Html.HiddenFor(i =>i.PortfolioId, htmlAttributes: new { @Value = ViewBag.PortfolioId })

will solve your problem if your "PortfolioId" is really a property model.

edited Dec 07 '20 at 13:03

SCouto

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answered Dec 07 '20 at 11:17

Atakan Günay

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Thanks for the clarity! Indeed this is what you need when your property is part of a model (as is in all mvc cshtmls (:_) – real_yggdrasil Mar 03 '22 at 20:26

Pass a ViewBag instance to a HiddenFor field in Razor

3 Answers3