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Expander button not working when creating groups

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Martin
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Martin asked on 25 Nov 2019, 03:52 PM

I use a RadGridView for displaying data from a database. I'm on .NET Core 3.0 and use Telerik UI for WPF 2019_3_1023 NuGet NoXaml Version oft the controls. 

I have encountered a strange behaviour when i do grouping for some columns. The group header row is displayed correctly with the expander button on the left side, followed by the grouping information. The strange thing is, that clicking on the expander icon (arrow down) doesn't expand the grouped rows. Only clicking the text representing the items the grid is grouped after expands the row to show the grouped rows. I have some implicit styling applied (mainly colors, font and row height of the grid) and use the material design. Even after removing the implicit stylings, the grid behaves strange. Can't geht the expander button to work, which is annoying for customers, as they expect that the icon responds to clicking (as seen in the Telerik Demo app for example). Is it possible that the styling could affect the expander button behaviour?

 

Thanks,

Martin

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Martin Ivanov
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answered on 28 Nov 2019, 10:05 AM

Hello Martin,

Thank you for the provided information. 

Yes, in some cases custom styling can lead to different issues if a setter or a base style is missing for example. However, to tell exactly what happens, some example code will be needed. I've used your description to create a sample project, but I wasn't able to replicate the issue. Can you please check it out and let me know if I am missing anything?

Regards,
Martin Ivanov
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Martin
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answered on 02 Dec 2019, 07:21 AM

Thank you, Martin, for the sample project!

Used it to apply all the styles and themes I use and that i have modified in some way, but unfortunately your sample "still" works as expected. ;-) I was not able to break it the way i broke the grid in my application. Will have to take a deeper look into it and will report back.

Regards, Martin

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