CODEWITHSUNDEEP
c#wpfdependency-properties
Sinatr
Sinatr

Reputation: 21998

Dependency property - metadata options without specifying default value

public double FontSize
{
    get { return (double)GetValue(FontSizeProperty); }
    set { SetValue(FontSizeProperty, value); }
}
public static readonly DependencyProperty FontSizeProperty =
    TextElement.FontSizeProperty.AddOwner(typeof(OutlineTextBlock),
    new FrameworkPropertyMetadata(XXX, FrameworkPropertyMetadataOptions.AffectsRender));

I don't want to specify XXX and there is no override to specify only AffectsRender.

If I do like this

    new FrameworkPropertyMetadata()

then property will take default value from somewhere.

How to specify AffectsRender without default value?

Upvotes: 1

Views: 490

Answers (1)

Lukazoid
Lukazoid

Reputation: 19426

Try the following

new FrameworkPropertyMetadata { AffectsRender = true; }

By not specifying a default value, the base PropertyMetadata does not get flagged as the default value being modified. This ensures when the metadata is merged, the original default value is used but the AffectsRender flag is added.

Upvotes: 3

Related Questions