如何将GroupBox，DataGrid和菜单置于位置

Question

Im struggling to position a GroupBox, a DataGrid and a Menu from Top to Bottom. So for the first approach I used the StackPanel (Pseudo XAML Code):

<StackPanel>
    <GroupBox/>
    <DataGrid/>
    <Menu/>
</StackPanel>

The problem is that I want the DataGrid to fill the rest of the space between the Groupbox and Menu and it keeps displaying like that:

I tried using the DockPanel:

<DockPanel>
   <GroupBox DockPanel.Dock = "Top"/>
   <DataGrid/>
   <Menu DockPanel.Dock = "Bottom"/>
</DockPanel>

It stretches the DataGrid well but the Menu is not positioned properly

Also in this case the DataGrid collapses after compilation

How should I do this so the elements display properly ?

Answer 1

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

    <GroupBox Grid.Row="0" />
    <DataGrid Grid.Row="1" />
    <Menu Grid.Row="2" />
</Grid>

Answer 2

This will work - can't really give you a correct answer to why it works like this, but it has something to do with which components get created first whenever you are using docking. So by placing menu above the datagrid, your dockpanel works as you described.

Please someone correct me if i'm mistaking. Still learning about this myself.

<DockPanel>
    <GroupBox Header="Filter" DockPanel.Dock="Top">
        <StackPanel Orientation="Horizontal">
        <Label Content="Label 1" />
        <Label Content="Label 2" />
        </StackPanel>
    </GroupBox>
    <Menu DockPanel.Dock="Bottom">
        <MenuItem Header="Menu 1">

        </MenuItem>
        <MenuItem Header="Menu 2">

        </MenuItem>
    </Menu>
    <DataGrid>
        <DataGrid.Columns>
            <DataGridTextColumn Header="Header1" Width="*" />
            <DataGridTextColumn Header="Header2" Width="*" />
            <DataGridTextColumn Header="Header3" Width="*" />
            <DataGridTextColumn Header="Header4" Width="*" />
        </DataGrid.Columns>
    </DataGrid>
</DockPanel>

Hope this helps.