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Hello Yana,
When setting the ContentURL of the PageView, that means it will display the child page inside an iframe, so it is not possible on the server to access controls from the child page.
If the server-side is a must, then they should use UserControls instead of separate pages and ContentUrl.
Another option, depending on the project's requirements, is to register a script from the server, that would access the child page once it is loaded on the client-side:
Furthermore, you can use such a script that would access the child page and then trigger an AJAX request to the server with the values obtained from the child page.
Regards,
Peter Milchev
Progress Telerik
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Yana
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answered on 10 Jun 2020, 08:35 PM
:(
Thank you though