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Hi people.
Follow my previous post in How do I add new row in datagrid in WPF?[^]
I need to know how may I use animation when a row adds or inserts into this DataGrid?
I mean when I add or insert new row, it opens like curtain... or accordion.
Thanks
I should remind that the DataGrid source is ObservableCollection.

What I have tried:

I searched internet, but I could not find any idea.
Posted
Updated 14-Jan-24 8:26am
v2

I searched CodeProject articles...
Animation using Storyboards in WPF[^]
This may help you to write the code for your own needs.
 
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Sh.H. 15-Jan-24 0:50am    
@Jo_vb.net
Thanks.
Actually I read that article some months ago. It is not not helping me about this question.
Further to Jo's answer, yes, the article link he has pointed you to does not give you the exact answer that you want however it does show you how to animate. The same principle applies. You need to take that and write the code or use the answer and do the research.

So, use Google Search and look for pointers, like:
* wpf change size animation[^]
* wpf datagrid add row animation[^]
* and so on ...

UPDATE

As I mentioned above, you need to do your research.

My other answer today[^] that you accepted had a link to the DataGrid default template[^]. If you study it, you will see that all of the items are managed in the ItemsControl template. So I did a quick google search: wpf animate add to items panel[^]

Which found this article: WPF ItemsControl with animation on insert – asimplify – aSimplify[^]

Now, this is not for the DataGrid however the same principle applies. Without trying, I would think that you would just need to change the animation direction and the code should work.
 
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Sh.H. 15-Jan-24 4:56am    
@Graeme_Grant
Thanks for the answer.
What I need is how the approach, not the exact code.
Look, I know about animations. But what I need to know is that, how can I do this when I have an ObservableCollection ? What trigger I should use in this situation? Because when I use the code "Insert", the ObservableCollection updates immediately, And also the DataGrid updates too. So how can I tell the dataGrid that update via animation?
Jo_vb.net 15-Jan-24 10:17am    
Your other question about binding a ControlTemplate indicates that you use MVVM and therefor use a "PropertyChanged" signal.
Why not using PropertyChanged for starting the animation?
Sh.H. 15-Jan-24 10:19am    
@Jo_vb.net
How should I tell the DataGrid (with PropertyChanged) that which row is going to add and animation?
Jo_vb.net 15-Jan-24 11:24am    
The PropertyChanged signal is the trigger to start the animation.

You should not tell the DataGrid something about the new row but ask the DataGrid for details about the new row (DataGrid.AddingNewItem event and / or others).
See https://stackoverflow.com/questions/4617810/wpf-datagrid-event-for-new-rows

Sh.H. 15-Jan-24 12:01pm    
@Jo_vb.net
Then the PropertyChanged signal is the trigger to any kind of changing, even if I type new data in a cell, or erase data from a cell. How can I set this to only add new row?

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