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POUsing ViewModel Pattern with MVC 2 Strongly Typed HTML Helpers
 

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  1. POUsing ViewModel Pattern with MVC 2 Strongly Typed HTML Helpers
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    <p>I am working with ASP.NET MVC2 RC and can't figure out how to get the HTML helper, <strong>TextBoxfor</strong> to work with a <strong>ViewModel pattern</strong>. When used on an edit page the data is not saved when UpdateModel() is called in the controller. I have taken the following code examples from the NerdDinner application.</p> <p>Edit.aspx</p> <pre><code>&lt;%@ Language="C#" Inherits="System.Web.Mvc.ViewUserControl&lt;NerdDinner.Models.DinnerFormViewModel&gt;" %&gt; ... &lt;p&gt; // This works when saving in controller (MVC 1) &lt;label for="Title"&gt;Dinner Title:&lt;/label&gt; &lt;%= Html.TextBox("Title", Model.Dinner.Title) %&gt; &lt;%= Html.ValidationMessage("Title", "*") %&gt; &lt;/p&gt; &lt;p&gt; // This does not work when saving in the controller (MVC 2) &lt;label for="Title"&gt;Dinner Title:&lt;/label&gt; &lt;%= Html.TextBoxFor(model =&gt; model.Dinner.Title) %&gt; &lt;%= Html.ValidationMessageFor(model=&gt; model.Dinner.Title) %&gt; &lt;/p&gt; </code></pre> <p>DinnerController</p> <pre><code>// POST: /Dinners/Edit/5 [HttpPost, Authorize] public ActionResult Edit(int id, FormCollection collection) { Dinner dinner = dinnerRepository.GetDinner(id); if (!dinner.IsHostedBy(User.Identity.Name)) return View("InvalidOwner"); try { UpdateModel(dinner); dinnerRepository.Save(); return RedirectToAction("Details", new { id=dinner.DinnerID }); } catch { ModelState.AddModelErrors(dinner.GetRuleViolations()); return View(new DinnerFormViewModel(dinner)); } } </code></pre> <p>When the original helper style is used (Http.TextBox) the UpdateModel(dinner) call works as expected and the new values are saved. </p> <p>When the new (MVC2) helper style is used (Http.TextBoxFor) the UpdateModel(dinner) call does not update the values. Yes, the current values are loaded into the edit page on load.</p> <p>Is there something else which I need to add to the controller code for it to work? The new helper works fine if I am just using a model and not a ViewModel pattern.</p> <p>Thank you.</p>
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    1. COHi, i have the same issue on create action. Can you please take a look http://stackoverflow.com/questions/2494940/custom-viewmodel-with-mvc-2-strongly-typed-html-helpers-return-null-object-on-cre
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      1. POUsing ViewModel Pattern with MVC 2 Strongly Typed HTML Helpers
      1. USBarbaros Alp
 

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