Question

I was wondering, what will be the best way to override the Tree View s mouse click? As you know when you double click a tree view parent, then the tree view expands and shows the children. If it doesn t have any children then it doesn t do anything. but if it is already expanded, it will the collapse.

I want to take the tree view, and when you double click the children, it will bind to some sort of command.

So basically, i would like to keep the functionality of the parent, where you double click and it expands or collapses, but when you double click the Child, it will execute a certain command..

I am using XAML and C#.

Answer 1

Remember that events bubble in WPF, so you can have an event handler on double click to do your own thing -- and as long as you don t set RoutedEventArgs.Handled to true it will keep bubbling and should trip off the default behavior as well.

Specifically, just set up a handler for MouseDoubleClick on the treeview:

<TreeView MouseDoubleClick="TreeView1_MouseDoubleClick" Width="194" Height="200">
...
</TreeView>

Do whatever you need to do inside the handler, and the double click to expand/contract functionality of the treeview won t be impacted.

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