WPF Window Maximized with Border Brush - Fill entire page

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Hello fellow coders,
I have a WPF page and I'm stuck. I want to have a border around a tree view with corner radius running along the left side of window on load. The page loads 600 x 750, but allows full screen. When the user maximizes the screen, I want the border to stay top 10 (which is does), left 7 (which is does), bottom 10 - WHICH IS DOES NOT (aka: code below wrapped in <Canvas></Canvas>). As you can see, I tried that, but it doesnt work. What I think I'm trying to ask for is Height = Auto or 100% or * or something that fills the screen 10 from the top and bottom (Canvas.Top="10" Canvas.Bottom="10" Canvas.Left="7") and scales properly on resize. Thoughts?

C#

<Grid Height="254" Width="140" Canvas.Top="5" Canvas.Left="5" />
        <Border BorderBrush="#FF252A30" CornerRadius="5,5,5,5" BorderThickness="2,2,2,2"
                Height="545" Canvas.Left="7" Canvas.Top="10" Canvas.Bottom="10" Width="204">
            <TreeView x:Name="TreeView1" HorizontalAlignment="Left"
                      VerticalAlignment="Top" Width="184" Height="525" Margin="8,8,0,0">
                <TreeViewItem Header="Header" IsExpanded="False">
                    <TreeViewItem Header="Smaller Header" IsExpanded="False">
                        <TreeViewItem Header="New" />
                        <TreeViewItem Header="Search" />
                        <TreeViewItem Header="Transfer" />
                    </TreeViewItem>
                    <TreeViewItem Header="Smaller Header 2" IsExpanded="False">
                        <TreeViewItem Header="1" />
                        <TreeViewItem Header="2" />
                        <TreeViewItem Header="3" />
                        <TreeViewItem Header="4" />
                    </TreeViewItem>
                </TreeViewItem>
// whole bunch more tree views...
            </TreeView>
        </Border>

Posted 17-Dec-14 9:57am

Derek Kennard

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Derek Kennard · Answer 1 · 2014-12-17T11:08:00

XML

<grid>
            <grid.columndefinitions>
                <columndefinition width="475" />
                <columndefinition width="*" />
            </grid.columndefinitions>
            <grid.rowdefinitions>
                <rowdefinition height="*" />
                <rowdefinition height="200" />
            </grid.rowdefinitions>
//CODE stuff here
// like <dockpanel grid.column="0" grid.row="0" mode="hold" /></grid>

Now, when I expand the treeview, the border grows with it. I'd still like to find a way to maximize the border on full screen, but this will work.