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    copied!<p>If you use a runat="server" tag on ANY element, such as a DIV it will render that code as a separate <strong>method</strong> in the compiled page.</p> <p>If you're converting 'legacy' code its a good idea to remove all runat tags right up front otherwise you end up in a situation where code like the following gives you an error.</p> <pre><code>&lt;% foreach (var cat in cats) { %&gt; &lt;div runat="server"&gt; &lt;span class="name"&gt; &lt;%= cat.name %&gt; &lt;/span&gt; is a &lt;span class="breed"&gt; &lt;%= cat.breed %&gt; &lt;/span&gt; &lt;/div&gt; &lt;% } %&gt; </code></pre> <p>This code will fail telling you some craziness about <code>'cat'</code> being out of scope. Eventually when you look at the full generated code you'll see that the <code>&lt;div&gt;</code> has been generated as its whole own method - which is of course a different scope with no cats in sight.</p> <p>Back for a second to the default template for an MVC application:</p> <p>You'll see the current template gives you this for the <code>head</code> :</p> <pre><code>&lt;head runat="server"&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /&gt; &lt;title&gt;&lt;%= Html.Encode(ViewData["Title"]) %&gt;&lt;/title&gt; &lt;link href="../../Content/Site.css" rel="stylesheet" type="text/css" /&gt; &lt;/head&gt; </code></pre> <p>This left me wondering -- if we're using &lt;%= syntax to write the title directly into the <code>title</code> tag - then why would we need to make it runat?</p> <p>It turns out as I suspected that the codebehind for <code>head</code> looks for an existing value inside the title tag (which would have been output here by <code>&lt;%= Html.Encode(ViewData["Title"]) %&gt;</code>. If it finds one (which will be the case for the all sample views in the MVC template) then it won't do anything further. If no title exists (if ViewData["Title"] is null or empty) it will default to whatever is defined in your view by the <code>Title</code> attribute :</p> <pre><code>&lt;%@ Page Language="C#" MasterPageFile="~/Views/Shared/RRMaster.Master" Title="View Products" AutoEventWireup="true" CodeBehind="ViewProduct.aspx.cs" Inherits="RR_MVC.Views.Products.ViewProduct" %&gt; </code></pre> <p>In my master page I would have removed the <code>runat='server'</code> tag - since I dont think I'll ever want to populate my page title from the view's <code>Title</code> property. But I'm holding off doing this pending Phil's promised blog post on the subject - in case the runat server gives me anything useful for my CSS and JS too.</p>
 

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