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Editorial Team
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Asked: 2026-05-16T22:45:07+00:00

I am trying to change the master page dynamically, and although it’s easy to

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I am trying to change the master page dynamically, and although it’s easy to do from a content page (overriding OnPreInit), there is no such event for a master page. Is it possible to introduce this event somehow?

UPDATE: I got halfway there by going via the PreInit of the pages at the bottom of the ladder, turns out you can do things like base.Master.MasterPageFile = "/master.Master";, but for some reason this doesn’t load the stuff in the header of the top-most master page, namely stylesheets.

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1 Answer

  1. Editorial Team

    Quoting from: Can I change a nested master page's master dynamically?

    Just tested this and it works from the PreInit of the Page that is using the nested MasterPage.
    protected void Page_PreInit(object sender, EventArgs e)
    {
    this.Master.MasterPageFile = “/Site2.Master”;
    }

    Obviously you will need to ensure that the ContentPlaceholderIds are consistent across the pages you are swapping between.

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