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    <p>The approach you may take will vary greatly depending on the specific scenario. A few options incude:</p> <ul> <li>Doing as you say and adding the conditional in the view</li> <li>Abstracting the conditional (if it is complex) into your view model so that the lines in the view are still simple (just accessing a preset boolean value on your view model).</li> <li>Doing this conditional at the route or controller level and calling a different overall view (which may share a layout (razor) or master view (webforms mvc))</li> </ul> <p>You don't mention explicitly how you would render the controls in the conditional. I assume you would be doing a RenderPartial. So the lines themselves in the view would be quite 'small'.</p> <pre><code>if(myViewModel.ComplexBoolean) // Boolean set in generation of view model Html.RenderPartial('firstPartial') else Html.RenderPartial('secondPartial') </code></pre> <p><strong>EDIT</strong>: If the item you are setting as 'visible' is simply a single control you may just output the control directly e.g.</p> <pre><code>if(myViewModel.ComplexBoolean) { Html.DropDownListFor(m =&gt; m.Type, Model.Types /* An IEnumerable&lt;SelectListItem&gt;*/, new { @class = "myList" }); } </code></pre> <p>Additionally if you didn't want to set that 'Model.Types' property (to save a db hit for example) then the conditional could be in the location you create your view model (either the controller or some service/view model repo). The view could then just check for the properties existance instead:</p> <pre><code>if(Model.Types != null) { Html.DropDownListFor(m =&gt; m.Type, Model.Types /* An IEnumerable&lt;SelectListItem&gt;*/, new { @class = "myList" }); } </code></pre>
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    1. POWhat's the recommended pattern for handling control display logic in ASP.NET MVC?
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    1. COThis is what I was thinking for chunks of the view that would change conditionally, but I'm thinking more of individual controls in the view. For example, assuming I have a listbox, a checkbox, and a textbox, and the visibility of each was driven by some independent conditional logic. Is there a performance overhead for multiple partial views?
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      1. USShawn Hubbard
    2. COYou wouldn't necessarily do partial views in those cases. I've added some content to the answer with regard to strategies there. I don't know of specific figures/quantifiable data on performance but I would assume, by a leap of logic, that less is better.
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    3. COCool, thanks for the info.
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