Hello,
I have a strange behavior during grouping.
When I drag a column to the header and the grouping is performed then you redraw the RadGridView layout.
Sometimes I see the first group at the middle of the grid instead of the top (there is an empty space in half of the grid). If I scroll a little bit then the layout is fixed and the grid looks as expected.
I tried to InvalidateVisual on the Grouped event but it looks the same. How do I solve it ?
Hi Martin,
It is not working. I am using VisualStudio2013Theme (Dark Pallete).
I can see that the problem is not happening while setting style={x:Type Null}
Do you have any idea what can cause this issue?
I will try to reproduce. My code is very complex and I am not allowed to post the code here. I will try to make some time to create a sample application. In the mindtime can you check please if you face any problem with VisualStudio2013Theme?
Just group a column by property, for example "name".
Let's say that without grouping you have 1,000 rows with vertical scrollbar AUTO and after grouping you have two groups, so the groups are collpased and the scrollbar should dissapear because with two groups you will have two rows of 50 items per group (both groups collased).
You can initialze a collection with half of the items with Name="aaa" and the other half Name="bbb"
Hi martin, I want to apologyze.
I checked again and it seems that the GroupRenderMode=Flat is the problem.
Everything works as expected with GroupRenderMode=Nested.
The problems is that the performance is extremelly bad with only 500 items with refresh rate of 1 second (of course the UI thread is doing other work in parallel).
The RadGridView has 30 columns, only 7 are visible in the window, virtualization is enabled for rows and columns.
Can you fix the issue with GroupRenderMode.Flat?
Thank you for the additional information. I couldn't find anything similar that is reported or can be reproduced, so I will guess that there is a specific combination of setting that should be applied. Also note that, there were some similar issues in the past which were resolved. This said, I recommend you to test with the latest version of Telerik UI for WPF and see if the issue still occurs.
If that doesn't help, I will stick to the Stenly's query about providing a sample project. This will allow us to test it and see what exactly happens. In order to avoid any privacy issues about your code, you can extract only the RadGridView setup along with some dummy models and data in an isolated project.