How to anchor controls in WPF?

Question

I have a a TreeView that fills the top part of the application, but since the number of items in the TreeView changes, my Apply button changes its

Answer 1

You can either set the HorizontalAlignment and VerticalAlignment on the TreeView or Button (I cannot tell which control you are trying to anchor), or you could place the control inside a DockPanel.

To space the control away from others use the Margin.

Margin="0 0 10 10"

will give you the margin only on the right and bottom

I hope this makes it a bit clearer:

<Window>   
  <DockPanel VerticalAlignment="Stretch">
    <TreeView DockPanel.Dock="Top" />
    <Button DockPanel.Dock="Bottom" Margin="0 0 10 10" />   
  </DockPanel>
</Window>

Answer 2

I think you need this in the XAML of your button:

HorizontalAlignment="Right" VerticalAlignment="Bottom"

Answer 3

To achieve anchoring, Set following properties:

• Width="auto"
• Height="auto"
• VerticalAlignment="Stretch"
• HorizontalAlignment="Stretch"
• Set margins as needed.

Example:

    <TabControl

        Name="tabControl1"

        HorizontalAlignment="Stretch" 

        Margin="40,40,40,40"  

        Width="auto" 

        Height="auto" 

        VerticalAlignment="Stretch">