[Solved] radSplitter

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Curtis
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Curtis asked on 13 Mar 2026, 07:08 PM

I may have missed someone already talking about this - but for those of us who like to give our users the ability to select their own "Theme" one ugly issue I'm constantly having to deal with is:  When the user changes their theme, I have to manually change the "look" for every Splitter in my application (400+ WinForm classes, there are probably a few thousand "Splitters")

Is there some technical reason there's no "RadSplitter" in the Telerik WinForms library and if there is not, I'd like to suggest that this be added.  It's a super-commonly used WinForm control, I'm a little shocked it's not already present in this spectacular WInForms UI Library!

p.s. using a SplitContainer is often not possible because of downward compatibility with the older app suits but does make a nice alternative for newer forms.

Kindest regards,

LK

 

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Nadya | Tech Support Engineer
Telerik team
answered on 18 Mar 2026, 01:15 PM

Hello, Curtis,

Currently, there is no dedicated RadSplitter control available in the Telerik UI for WinForms suite. The main reason is that we offer RadSplitContainer which provides equivalent and extended functionality. It includes a SplitterElement, which enables resizing between different split panels. Please note that the default resizing behavior is based on the resizable panels rather than the splitter element itself. The standart .NET Splitter also requires split contaners and achieve the same functionality is resizing.

The RadSplitContainer is designed to deliver advanced splitting capabilities along with enhanced theming support, effectively replacing standard container controls with a more flexible and feature-rich solution. For this reason, when a splitter-like functionality is required by our customers, we generally recommend using the RadSplitContainer.

I understand that migrating existing forms from an older application may require additional effort on your side, and I appreciate your understanding in this regard.

    Regards,
    Nadya | Tech Support Engineer
    Progress Telerik

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    Curtis
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    commented on 18 Mar 2026, 06:21 PM

    Thank you Nadya.  It's a lovely alternative.  My challenge is that this application is, well, its large.  Roughly 500k lines of code and all driving the gorgeous Telerik UI :)  I was hoping to make a "control swap" for as many WinForms controls I could and there are a lot of Splitters being used hence my question!

    All of my future forms will be designed with the SplitContainer in mind.

    Cheers!

    -c

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