TreeView Expand

Question

I'm new in WPF. Let me explain you what is my case. So I have 3 TreeViews with the same source, my point is, is it possible when I expand one of the the item in the first tree automatically to expand the same element in the other trees? And I have another question how to make every line in the TreeView to be different color?

For example 1, 3, 5, 7 line to be gray, and 2,4,6,8 to be white.

<Grid> 
    <TreeView x:Name="TreeView1" Margin="10,20,10,10" ItemsSource="{Binding Groups}" ItemTemplate="{StaticResource GroupsTemplate}" Grid.Column="0" IsDragDropEnabled="True"/> 
    <TreeView x:Name="TreeView2" Margin="10,20,10,10" ItemsSource="{Binding Groups}" ItemTemplate="{StaticResource GroupsTemplate}" Grid.Column="1" IsDragDropEnabled="True"/> 
    <TreeView x:Name="TreeView3" Margin="10,20,10,10" ItemsSource="{Binding Groups}" ItemTemplate="{StaticResource GroupsTemplate}" Grid.Column="2" IsDragDropEnabled="True"/> 
</Grid>

hi, welcome to stack overflow. when asking a question include any code you have created so far. You should at least have a go and the post specific issues you are having. There are many ways to do what you are doing. Eg are you using the MVVM approach? — Tim Rutter, Mar 29 '16 at 10:19
This may help: http://stackoverflow.com/questions/18403929/setting-isexpanded-on-a-wpf-treeviewitem-from-a-datatrigger — Tim Rutter, Mar 29 '16 at 10:31
I'd do some reading about binding TreeView - using HeirarchicalDataTemplate. You basically need to bind IsExpanded to a value in your view model. Once you've done that for all three treeviews you'll get the behaviour you need. — Tim Rutter, Mar 29 '16 at 10:34

score 0 · Accepted Answer · edited May 23 '17 at 12:07

I strongly recommend for you as a newbie to study/try to code in MVVM design pattern. In MVVM you can use this great answer for your requirements.

Anyway,for your current problem:

Create a callback for 'selectionChange' event, in this event use the name of the other treeViews to get to the controles and manipulate them.
You can use HierarchicalDataTemplate,styles and resurces to style the treeView as you wish.

TreeView Expand

1 Answers1