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    <p>When you pass your object back to the controller, you have to wrap your code in <code>If ModelState.IsValid</code> </p> <p>Below is a simplified version of how I edit a user. The first "EDIT" sends the User object TO the View. The second "EDIT" handles the post from the view.</p> <pre><code>Function Edit() As ActionResult ''# do stuff to populate your User Return View(User) End Function &lt;AcceptVerbs(HttpVerbs.Post)&gt; _ Function Edit(ByVal user as User) If ModelState.IsValid Then ''# do your valid stuff Else ''# The posted form was not valid, send the user back Return View(user) End If End Function </code></pre> <p>Here's the same thing in C#</p> <pre><code>public ActionResult Edit() { // do stuff to populate your User return View(User); } [AcceptVerbs(HttpVerbs.Post)] public object Edit(User user) { if (ModelState.IsValid) { // do your valid stuff } else { //'# The posted form was not valid, send the user back return View(user); } } </code></pre> <h1>EDIT:</h1> <p>On your view, if you want to add AJAX validation, just add the following.</p> <pre><code> &lt;% Html.EnableClientValidation() ''# This is where all the magic happens. It will build your clientside validation for you out of your MetaData. Using Html.BeginForm("Edit", "Users") %&gt; &lt;!-- all your markup crap --&gt; &lt;tr&gt; &lt;td&gt; &lt;%: Html.LabelFor(Function(model) model.UserName)%&gt;&lt;/td&gt; &lt;td&gt; &lt;%: Html.TextBoxFor(Function(model) model.UserName) %&gt; &lt;%: Html.ValidationMessage("UserName", "*")%&gt;&lt;br /&gt; &lt;/td&gt; &lt;/tr&gt; &lt;!-- somewhere you'll want to add a Validation Summary of all your errors --&gt; &lt;%= Html.ValidationSummary("Oops!, please correct the errors...") %&gt; &lt;% End Using%&gt; &lt;!-- bottom of the page --&gt; &lt;script src="../../Assets/Scripts/MicrosoftAjax.js" type="text/javascript"&gt;&lt;/script&gt; &lt;script src="../../Assets/Scripts/MicrosoftMvcAjax.js" type="text/javascript"&gt;&lt;/script&gt; &lt;script src="../../Assets/Scripts/MicrosoftMvcValidation.js" type="text/javascript"&gt;&lt;/script&gt; </code></pre> <h1>EDIT:</h1> <p>Here is some info on rendering using <code>Ajax.BeginForm</code><br> <a href="http://singulartechnologies.com/asp-net-mvc-ajax-beginform-sample-code" rel="nofollow noreferrer">http://singulartechnologies.com/asp-net-mvc-ajax-beginform-sample-code</a><br> <a href="http://msdn.microsoft.com/en-us/library/dd381533.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/dd381533.aspx</a><br> <a href="http://weblogs.asp.net/mikebosch/archive/2008/02/15/asp-net-mvc-submitting-ajax-form-with-jquery.aspx" rel="nofollow noreferrer">http://weblogs.asp.net/mikebosch/archive/2008/02/15/asp-net-mvc-submitting-ajax-form-with-jquery.aspx</a> </p>
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    1. POASP.NET MVC 2 server-side validation for ajax form
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    1. COplease note, the VB code was run through a converter to get the C# stuff... my C# chops are not what they should be.
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    2. COrockinthesixstring, thanks for the response. This solution works perfectly for none ajax forms, i.e. forms created using Html.BeginForm helper. But I use Ajax.BeginForm. And if Model is invalid form is not updated to show errors in validation summary area to a user.
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    3. COAdding AJAX validation is very easy... see my edit.
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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