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POTextBox(HtmlHelper, String) - is view model also searched for a value?
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  1. POTextBox(HtmlHelper, String) - is view model also searched for a value?
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    copied!<p>Pro Asp.Net MVC 4 (pg 535):</p> <blockquote> <p>The string argument is used to search the view data, ViewBag and view model to find a corresponding data item that can be used as the basic for the input element. So, for example, if you call <code>@Html.TextBox("DataValue")</code>, the MVC Framework tries to find some item of data that corresponds with the key DataValue. The following locations are checked: • ViewBag.DataValue • @Model.DataValue</p> </blockquote> <p>Book states that an overload of a Html.TextBox which takes a single string argument checks both <code>ViewData</code> and <em>view model</em> to obtain the value for display. But after experimenting a little, it seems it only checks <code>ViewData</code> for a value, but not also a <em>view model</em>.</p> <p>Thus, in the output generated from <code>Html.TextBox</code> the <code>value</code> attribute is set to an <em>empty string</em>:</p> <pre><code>public class Person { public string FirstName = "Leila"; } </code></pre> <p>*.cshtml:</p> <pre><code>@model HelperMethods.Models.Person ... @Html.TextBox("FirstName") </code></pre> <p>Output:</p> <pre><code> ... &lt;input id="FirstName" name="FirstName" type="text" value="" /&gt; </code></pre> <p>So is the book wrong and <code>TextBox(HtmlHelper, String)</code> checks only <code>ViewData</code> or does it also check a <em>view model</em>?</p> <p><strong>UPDATE:</strong></p> <pre><code>public class Person { public string FirstName = "Leila"; } public class HomeController : Controller { public ActionResult Index() { return View((object)new Person()); } } </code></pre> <p>Index.cshtml:</p> <pre><code>@model Mvc4.Controllers.Person @{ Layout = null; } &lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;meta name="viewport" content="width=device-width" /&gt; &lt;title&gt;Index&lt;/title&gt; &lt;/head&gt; &lt;body&gt; @Html.TextBox("FirstName") &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Much appreciated</p>
 

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