Windows Presentation Foundation (WPF) Question: Download Questions PDF
How can I create Custom Read-Only Dependency Properties?
Answer:
The typical reason for specifying a read-only dependency property is that these are the properties that is used to determine the state, but where the state is defined in a multitude of factors. A typical example for a read-only property is IsMouseHover
This example shows how to 'register' an attached property as read-only. You can use dependency properties on any 'DependencyObject' types.
[C#]
public static readonly DependencyProperty IsBubbleSourceProperty = DependencyProperty.RegisterReadOnly(
"IsBubbleSource",
typeof(Boolean),
typeof(AquariumObject),
new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.AffectsRender)
);
This example shows how to 'register' an attached property as read-only. You can use dependency properties on any 'DependencyObject' types.
[C#]
public static readonly DependencyProperty IsBubbleSourceProperty = DependencyProperty.RegisterReadOnly(
"IsBubbleSource",
typeof(Boolean),
typeof(AquariumObject),
new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.AffectsRender)
);
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