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POValidation firing in ASP.NET MVC
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  1. POValidation firing in ASP.NET MVC
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    copied!<p>I am lost on this MVC project I am working on. I also read Brad Wilsons article. <a href="http://bradwilson.typepad.com/blog/2010/01/input-validation-vs-model-validation-in-aspnet-mvc.html" rel="nofollow noreferrer">http://bradwilson.typepad.com/blog/2010/01/input-validation-vs-model-validation-in-aspnet-mvc.html</a></p> <p>I have this:</p> <pre><code>public class Employee { [Required] public int ID { get; set; } [Required] public string FirstName { get; set; } [Required] public string LastName { get; set; } } </code></pre> <p>and these in a controller:</p> <pre><code>public ActionResult Edit(int id) { var emp = GetEmployee(); return View(emp); } [HttpPost] public ActionResult Edit(int id, Employee empBack) { var emp = GetEmployee(); if (TryUpdateModel(emp,new string[] { "LastName"})) { Response.Write("success"); } return View(emp); } public Employee GetEmployee() { return new Employee { FirstName = "Tom", LastName = "Jim", ID = 3 }; } </code></pre> <p>and my view has the following:</p> <pre><code>&lt;% using (Html.BeginForm()) {%&gt; &lt;%= Html.ValidationSummary() %&gt; &lt;fieldset&gt; &lt;legend&gt;Fields&lt;/legend&gt; &lt;div class="editor-label"&gt; &lt;%= Html.LabelFor(model =&gt; model.FirstName) %&gt; &lt;/div&gt; &lt;div class="editor-field"&gt; &lt;%= Html.DisplayFor(model =&gt; model.FirstName) %&gt; &lt;/div&gt; &lt;div class="editor-label"&gt; &lt;%= Html.LabelFor(model =&gt; model.LastName) %&gt; &lt;/div&gt; &lt;div class="editor-field"&gt; &lt;%= Html.TextBoxOrLabelFor(model =&gt; model.LastName, true)%&gt; &lt;%= Html.ValidationMessageFor(model =&gt; model.LastName) %&gt; &lt;/div&gt; &lt;p&gt; &lt;input type="submit" value="Save" /&gt; &lt;/p&gt; &lt;/fieldset&gt; &lt;% } %&gt; </code></pre> <p>Note that the only field editable is the LastName. When I postback, I get back the original employee and try to update it with <em>only</em> the LastName property. But but I see on the page is the following error:</p> <p>•The FirstName field is required.</p> <p>This from what I understand, is because the TryUpdateModel failed. But why? I told it to update only the LastName property. </p> <p><strong>I am using MVC2 RTM</strong></p> <p>Thanks in advance. </p>
 

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