Binding the value of a Setter Property in WPF

Question

I have spent all day looking for a way to display a default string of text on a ComboBox and the closest I managed to find that worked was an example that uses

Answer 1

Based on your posted code I'm assuming your using the Behavior from Here

Now if you download the sample zip in the above Link, you got 5 files that give you this set of Behavior's(found in the Behavior folder).

Edit TextBlockAdorner.cs

In the constructor just after the line

m_TextBlock = new TextBlock { Style = labelStyle, Text = label };

add

m_TextBlock.DataContext = adornedElement;

Now in your Style setter switch your Binding to

<Setter Property="TextBlock.Visibility"
        Value="{Binding DataContext.Visible}" />

and you should be done.

Side-Notes:

• Do not hold System.Windows.Visibility in your VM. Keep Visibility property in the VM as a bool and when your Binding it in xaml use a BooleanToVisibilityConverter(available directly in xaml. You do not have to create one)
• When your defining Style's get into the habit of specifying a Type="...". It not only helps identify at a glance which Style's relate to what but also saves some redundant type qualification for each of your setter properties.

so something like

<Setter Property="FrameworkElement.Opacity"
        Value="0.8" />

will be

<Style x:Key="watermarkLabelStyle"
        TargetType="{x:Type TextBlock}">
  ...
  <Setter Property="Opacity"
          Value="0.8" />

• Finally hopefully this is just a typo in your code but if not try to follow some naming convention with your Properties. In your VM, your property is called Visible while it's private back-end is _visibile.