Creating Style Trigger in code behind, only one of 2 setters is working

Question

The BorderThicknessProperty is being applied correctly, but the ForeGroundProperty is not. I have tried swapping positions of the setters, thinking maybe only the first was being applied. I have tried a couple of other properties and none have work except BorderThickness. I am guessing I need to get to the Textblock of the Content, but I don't know how I would do that.

var foregroundSetter = new Setter()
{
 Property = Button.ForegroundProperty,
 Value = Brushes.LightGray
};

var borderThicknessSetter = new Setter()
{
 Property = Button.BorderThicknessProperty,
 Value = new Thickness(0)
};

var isEnabledTrigger = new Trigger()
{
 Property = Button.IsEnabledProperty,
 Value = false
 //Setters = { foregroundSetter, borderThicknessSetter }
};
isEnabledTrigger.Setters.Add(foregroundSetter);
isEnabledTrigger.Setters.Add(borderThicknessSetter);

var style = new Style();
style.Triggers.Add(isEnabledTrigger);

var pdfButton = new Button()
{
 Padding = new Thickness(0, 0, 0, 0),
 Margin = new Thickness(0, 0, 5, 0),
 Height = 18,
 Width = 20,
 Content = "PDF",
 FontSize = 9,
 FontWeight = FontWeights.SemiBold,
 Foreground = Brushes.Red,
 BorderBrush = Brushes.Transparent,
 Background = Brushes.Transparent,
 ToolTip = new ToolTip() { Content = "Create PDF of training day." },
 Command = CreatePdfCommand,
 CommandParameter = newTab,
 Style = style
};

Answer 1

you assigned local value for Foreground property (Foreground = Brushes.Red). After that style trigger may be triggered but a Foreground setter from trigger will be ignored because local value has more weight (it is called Dependency Property value precedence)

to fix that behavior set normal Foreground value via style setter:

var foregroundNormalSetter = new Setter()
{
 Property = Button.ForegroundProperty,
 Value = Brushes.Red
};

var foregroundSetter = new Setter()
{
 Property = Button.ForegroundProperty,
 Value = Brushes.LightGray
};

var borderThicknessSetter = new Setter()
{
 Property = Button.BorderThicknessProperty,
 Value = new Thickness(0)
};

var isEnabledTrigger = new Trigger()
{
 Property = Button.IsEnabledProperty,
 Value = false
 //Setters = { foregroundSetter, borderThicknessSetter }
};
isEnabledTrigger.Setters.Add(foregroundSetter);
isEnabledTrigger.Setters.Add(borderThicknessSetter);

var style = new Style();
style.Setters.Add(foregroundNormalSetter);
style.Triggers.Add(isEnabledTrigger);

var pdfButton = new Button()
{
 Padding = new Thickness(0, 0, 0, 0),
 Margin = new Thickness(0, 0, 5, 0),
 Height = 18,
 Width = 20,
 Content = "PDF",
 FontSize = 9,
 FontWeight = FontWeights.SemiBold,
 //Foreground = Brushes.Red,
 BorderBrush = Brushes.Transparent,
 Background = Brushes.Transparent,
 ToolTip = new ToolTip() { Content = "Create PDF of training day." },
 Command = CreatePdfCommand,
 CommandParameter = newTab,
 Style = style
};