I have a Style redefining the ControlTemplate applied on a FrameworkElement. On given events, I want to be able to modify some properties of the content of the ControlTemplate (from code behind, not binding).
I get wanted FrameworkElement with this piece of code that I found here: Access control in style from code
FrameworkElement myTemplatedButton = this.Template.LoadContent() as FrameworkElement;
Ellipse ellipse = myTemplatedButton.FindName("SliderButton_ButtonControl") as Ellipse;
This seems to find the element I'm looking for as I dont get any error and the reference is well set.
However, when I try to update Properties like this
ellipse.Fill = Brushes.Red;
ellipse.Visibility = Visibility.Hidden;
Nothing changes in my application, and if I put a breakpoint in the code before re-triggering the event, I can see that the Property Visibility (for example) has been reset to Visibility.Visible.
It's like if the application was overriding my changes as soon as the function returns, and I have no idea why.
LoadContent() creates new elements based on the template.
If you want to modify an existing element, you should call the FindName method of the template of this one:
Ellipse ellipse = myTemplatedButton.Template
.FindName("SliderButton_ButtonControl", myTemplatedButton) as Ellipse;