WPF: How to make empty TextBlock not to occupy space?

Question

Let\'s say that I have a simple layout such as this:

Answer 1

You want to set the visibility of the textbox to "Collapsed".

Visibility can be either:
Visible - Self explanatory
Hidden - Invisible but still takes up space
Collapsed - Invisible and takes up no space

Edit: You should probably set up a trigger, like so:

<Trigger Property="Text" Value="{x:Null}">
    <Setter Property="Visibility" Value="Collapsed"/>
</Trigger>

Answer 2

You may want to try this:

<TextBlock.Style>
    <Style TargetType="{x:Type TextBlock}">
        <Style.Triggers>
            <Trigger Property="Text" Value="">
                <Setter Property="Visibility" Value="Collapsed"/>
            </Trigger>
        </Style.Triggers>
    </Style>
</TextBlock.Style>

This should fix the empty space issue based on a Null / Empty Binding.