How do I make a WPF layout Grid fill all available vertical space?

Question

I have a form with two Grid elements in a vertical StackPanel. I would have imagined the bottom Grid would automatically fill all available space, as I wish it to, but I have set heights on the Grid rows:

<RowDefinition Height="20" />
<RowDefinition Height="*" />
<RowDefinition Height="25" />

The short rows at the top and bottom are for labels and buttons, respectively. I have tried setting the grid's VerticallAllignment to Stretch, to no avail.

How do I anchor the bottom of the bottom grid to the bottom of the form, regardless of the form's height?

A vertical StackPanel never resizes its children vertically. Use an outer Grid with two rows or a DockPanel instead. — Clemens, Nov 11 '16 at 08:32

score 2 · Accepted Answer · edited Nov 11 '16 at 08:57

2

Essentially you can't use StackPanel to fill all available vertical space.

But you may use a DockPanel:

<DockPanel LastChildFill="True">
    <Grid DockPanel.Dock="Top"/>
    <Grid />
</DockPanel>

You may also use a Grid:

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>

    <Grid Grid.Row="0"/>
    <Grid Grid.Row="1"/>
</Grid>

edited Nov 11 '16 at 08:57

Clemens

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answered Nov 11 '16 at 08:43

A.N.

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`LastChildFill="True"` is the default, so it isn't necessary to set it explicitly. – Clemens Nov 11 '16 at 09:15
That combination of `"Auto"` and `"*"` was the answer I was looking for. Thanks! – nrod Jan 03 '20 at 17:14

How do I make a WPF layout Grid fill all available vertical space?

1 Answers1