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Editorial Team
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Asked: 2026-05-12T13:45:57+00:00

I have an MVC view page that uses a master page. The master page

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I have an MVC view page that uses a master page. The master page is not specified at the top of the view, but is specified in the Controller using the following method on the Controller class:

ViewResult View(string viewName, string masterName, object model)

This runs fine, but Visual Studio 2008 gives a warning in the aspx page: “Unrecognized tag prefix or device filter ‘asp'”.

If I add the MasterPageFile property to the view then the warning goes away. I can’t leave the master page specified here as it can be changed dynamically.

Not a big issue, just slightly annoying.

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1 Answer

  1. Editorial Team

    Perhaps it is complaining about the <asp:Content> element in your view. Without a statically defined master page, this element is orphaned as far as Visual Studio is able to tell.

    I don’t think there is any harm to defining the master page within your view and then redefining it programmatically as you have in your action method.

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