Combobox selectedValue in datagrid is changed when scrolling datagrid

[yaobiao131]

Describe the bug

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To Reproduce

Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

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Screenshots

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Environment

• OS: Mac,Windows
• Avalonia-Version: avalonia.11.1.999-cibuild0042398-beta

Additional context

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[yaobiao131]

and If I modify the selected value of the combobox and then scroll it, the selected value will go to other rows.

[jpgarza93]

I am having the same issue

[jpgarza93]

My current work around (i am using MVVM) is to check if selected index is -1. If so (for me) it means it was changed by the datagrid and not the user

set
 {
     if (value != -1)
     {
         _selectedIndex = value;
         OnPropertyChanged(nameof(SelectedIndex));
    }
 }

[yaobiao131]

My current work around (i am using MVVM) is to check if selected index is -1. If so (for me) it means it was changed by the datagrid and not the user

set
 {
     if (value != -1)
     {
         _selectedIndex = value;
         OnPropertyChanged(nameof(SelectedIndex));
    }
 }

it work well, thanks

[timunie]

Can you attach a minimum sample please? We recently had a similar issue which was solved as a binding was simply wrong

[blueperspective]

Same problem here, I tried to do a minimal repo sample DataGridTest. You need to click "enrich" button to set the combobox values (did this because it mimics what I have on a bigger app) ;

What I get :

• on first scroll, the 2 lines immediately after (and which were "hidden") have empty combobox selected value
• after some scrolling, the first line loses its combobox value
• some random lines loses combobox value while scrolling up and down several times
• if I maximize the window, I lose combobox selected value on ~6 lines

I could not reproduce what I have on my bigger, which is the last 2-3 lines which changes SelectedValue every time I scroll them out and then in.

[timunie]

@blueperspective great sample 👍 Added it to our roll-up list. @grokys