Hello Hadrien,
By default the
RadTabControl keeps the state of the currently selected
RadTabItem, only. After changing the selection the content of the last active tab is unloaded in order to load the content of the newly selected tab. However, in your case you can try setting the
IsContentPreserved property of the
RadTabControl to
True. By doing this you will force the
RadTabControl to keep the content of its items even when they are not selected. For more information you can read
this article.
Please give this approach a try and let us know if you have any other questions.
All the best,
Pavel R. Pavlov
the Telerik team