Treeview

[John]

We upgraded from 2.30 to 3.0 and immediately noticed our app stopped working. Properties of some controls seemed to have been removed. Could work with that. My main issue so far is the treeview expanded/unexpanded display has changed. Top level tree doesn't show any icon. Took the hierarchical treeview sample code and this is what I see

Is there some class styling conflict or something?

[Dimo]

Hi John,

• If you are using a custom theme, then please re-create it. (Actually, this is required after each product upgrade, not just with breaking changes).
• If you are using a CDN theme, then update the URL.
• If none of the above is true, try clearing the browser cache and send us a live URL or a runnable test project for inspection. I assume you are using this Load on Demand example, and it works as expected on my side.

[John]

I was using the Telerik theme when the project was created. Is there an easy way to update bootstrap-main.css? I'm not sure if we want to use CDN theme as we might want more control over accepting changes.

[Dimo]

@John - "bootstrap-main.css" implies that you are using one of the following:

• custom theme
• CDN theme or swatch (a swatch is a theme with a predefined color scheme)
• CDN theme or swatch that you have downloaded locally

For cases 2 and 3, update the CDN URL or download the correct version locally again.

For case 1, recreate the custom theme with our ThemeBuilder via import or from scratch.

It is vital to update custom themes, CDN URLs or downloaded theme swatches with every update of UI for Blazor. Otherwise you end up with styling issues like the current one.

[John]

Thanks, the download link is what I was looking for

[Semen]

Yes, they changed some styles and properties. Also they changed inner structure of some components.

https://www.telerik.com/forums/css-problems#5430602