FlowDocumentScrollViewer.SelectionOpacity 屬性

定義

命名空間:

System.Windows.Controls

組件:

PresentationFramework.dll

取得或設定 SelectionBrush 的不透明度。

public:
 property double SelectionOpacity { double get(); void set(double value); };

public double SelectionOpacity { get; set; }

member this.SelectionOpacity : double with get, set

Public Property SelectionOpacity As Double

屬性值

Double

SelectionBrush 的不透明度。 預設值是 0.4。

範例

下列範例會 FlowDocumentScrollViewer 建立 、將 SelectionBrush 屬性設定為粉紅色，並將 屬性設定 SelectionOpacity 為 0.7。

<FlowDocumentScrollViewer SelectionBrush="Pink" SelectionOpacity="0.7">
    <FlowDocument>
        <Paragraph>
            <Bold>Neptune</Bold> (planet), major planet in the solar system, eighth planet
from the Sun and fourth largest in diameter.  Neptune maintains an almost constant
distance, about 4,490 million km (about 2,790 million mi), from the Sun.  Neptune
revolves outside the orbit of Uranus and for most of its orbit moves inside the
elliptical path of the outermost planet Pluto (see Solar System). Every 248 years,
Pluto’s elliptical orbit brings the planet inside Neptune’s nearly circular orbit
for about 20 years, temporarily making Neptune the farthest planet from the Sun.
The last time Pluto’s orbit brought it inside Neptune’s orbit was in 1979. In
1999 Pluto’s orbit carried it back outside Neptune’s orbit.
        </Paragraph>
    </FlowDocument>
</FlowDocumentScrollViewer>

備註

如果您將 設定 SelectionOpacity 為 0，則 SelectionBrush 為透明且不可見。 如果您將 設定 SelectionOpacity 為 1.0，則 SelectionBrush 為不透明，且無法顯示選取的文字。