Question

Here is a simple code that exposes my problem :

<Grid>
    <TreeView Name="myTreeViewEvent" >
        <TreeViewItem Header="Employee1"/>
    </TreeView>
    <TreeView Name="myTreeViewEvent2" >
        <TreeViewItem Header="Employee2"/>
    </TreeView>
</Grid>

The thing is that my 2nd Treeview “overwrites” the 1st one…
Is there a way to change the behaviour so that the 2nd Treeview is “added” to the 1st one ?

(nb : no, I can’t put them in the same Treeview cause in my “real” code, I got 2 different Treeviews that I CAN’T merge… and I gotta display them in the same grid !)

Answer 1

Try this

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition />
    </Grid.RowDefinitions>
    <TreeView Name="myTreeViewEvent" >
        <TreeViewItem Header="Employee1"/>
    </TreeView>
    <TreeView Grid.Row="1" Name="myTreeViewEvent2" >
        <TreeViewItem Header="Employee2"/>
    </TreeView>
</Grid>

EDIT
Then what prevents you from using this approach?

<Grid>
        <StackPanel>    
            <TreeView Name="myTreeViewEvent">
                <TreeViewItem Header="Employee1"/>
            </TreeView>
            <TreeView Name="myTreeViewEvent2">
                <TreeViewItem Header="Employee2"/>
            </TreeView>
        </StackPanel>
</Grid>

In this case there is no strict division. The items will strech up.