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As dicsused in the subsection of Default (theme) style from the topic of Dependency Property Value Precedence we know that the theme style use the type as the key for controls; But when theme is applied to a given Element instanfe, themes lookup for the particule type is performed by checking the DefaultStyleKey;
from DefaultStyleKey, we know that it is a protected internal property, out of curious we want to find out what is the value of the DefaultStyleKey;
Below is the code that I used for the look up .
To reflection get a property
public static object ReflectionGetProperty(object obj, Type type , string propertyName, BindingFlags[] bindingFlags) { if (string.IsNullOrEmpty(propertyName)) throw new ArgumentException("propertyName"); if (bindingFlags == null) throw new ArgumentNullException("bindingFlags"); if (type == null) throw new ArgumentNullException("type"); if (bindingFlags.Length == 0) throw new ArgumentException("bindingFlags"); var binding = bindingFlags[0]; for (int i = 0; i < bindingFlags.Length; i++) { binding |= bindingFlags[i]; } var prop = type.GetProperty(propertyName, binding); if (prop != null) { return prop.GetValue(obj, null); } return null; }
To use the ReflectionGetProperty method to get the Value of "DefaultStyleKey"
public static object ReflectionGetDefaultStyle(FrameworkElement frameworkElement) { if (frameworkElement == null) throw new ArgumentNullException("frameworkElement"); object defaultStyleKey = ReflectionGetProperty(frameworkElement, typeof(FrameworkElement), "DefaultStyleKey", new BindingFlags[] { BindingFlags.NonPublic | BindingFlags.Instance }); if (defaultStyleKey != null) { var style = frameworkElement.TryFindResource(defaultStyleKey); return style; } return null; }
and suppose visual is an FrameworkElement, this is how you get Default Style.
FrameworkElement visual = ... var style = ReflectionGetDefaultStyle(visual);
If you inspect the value of DefaultStyleKey in the method, you will see that the value of the DefautlstyleKey as in the method ReflectionGetDefaultKey is
? defaultStyleKey {Name = "TextBlock" FullName = "System.Windows.Controls.TextBlock"} base {System.Type}: {Name = "TextBlock" FullName = "System.Windows.Controls.TextBlock"} Assembly: {PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35} ...
As you can see that it is just the Type of textBlock (our Visual is a TextBlock);
It does not have some pratical siginificance, but some explore that is interesting.
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