WebViewBrush 类

定义

public ref class WebViewBrush sealed : TileBrush

/// [Windows.Foundation.Metadata.Activatable(65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class WebViewBrush final : TileBrush

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class WebViewBrush final : TileBrush

[Windows.Foundation.Metadata.Activatable(65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class WebViewBrush : TileBrush

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class WebViewBrush : TileBrush

Public NotInheritable Class WebViewBrush
Inherits TileBrush

<WebViewBrush .../>

继承

Object Platform::Object IInspectable DependencyObject Brush TileBrush WebViewBrush

属性

ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows 要求

示例

以下特定于 Windows 8 的代码示例演示如何使用 WebViewBrush 使基于 XAML 的内容与基于 HTML 的内容重叠。 在此示例中， WebView 控件默认显示，使其保持交互。 但是，当 ComboBox 下拉列表打开时，它将与 WebView 控件重叠。 在这种情况下， WebView 处于隐藏状态，WebViewBrush 在占用相同空间的 矩形 上显示 HTML 内容。

<Grid x:Name="Output" Grid.Row="1">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>
    <ComboBox x:Name="ComboBox1" Height="50" Width="200" HorizontalAlignment="Left" Margin="10,0,0,0">
        <ComboBoxItem>
            <x:String>First Item</x:String>
        </ComboBoxItem>
        <ComboBoxItem>
            <x:String>Second Item</x:String>
        </ComboBoxItem>
        <ComboBoxItem>
            <x:String>Third Item</x:String>
        </ComboBoxItem>
        <ComboBoxItem>
            <x:String>Fourth Item</x:String>
        </ComboBoxItem>
        <ComboBoxItem>
            <x:String>Fifth Item</x:String>
        </ComboBoxItem>
        <ComboBoxItem>
            <x:String>Sixth Item</x:String>
        </ComboBoxItem>
        <ComboBoxItem>
            <x:String>Seventh Item</x:String>
        </ComboBoxItem>
    </ComboBox>
    <Border BorderThickness="1" BorderBrush="#FF707070"  Grid.Row="1" Margin="10,0,0,0">
        <Grid>
            <WebView x:Name="WebView6" />
            <Rectangle x:Name="Rect1"/>
        </Grid>
    </Border>
</Grid>

void SDKSample::WebViewControl::Scenario6::ComboBox1_DropDownOpened(
    Platform::Object^ sender, Platform::Object^ e)
{
    if (Rect1->Visibility == Windows::UI::Xaml::Visibility::Visible)
    {
        WebViewBrush^ b = ref new WebViewBrush();
        b->SourceName = "WebView6";
        b->Redraw();
        Rect1->Fill = b;
        WebView6->Visibility = Windows::UI::Xaml::Visibility::Collapsed;    
    }
}

void SDKSample::WebViewControl::Scenario6::ComboBox1_DropDownClosed(
    Platform::Object^ sender, Platform::Object^ e)
{
    WebView6->Visibility = Windows::UI::Xaml::Visibility::Visible;
    Rect1->Fill = ref new SolidColorBrush(Windows::UI::Colors::Transparent);
}

void ComboBox1_DropDownOpened(object sender, object e)
{
    if (Rect1.Visibility == Windows.UI.Xaml.Visibility.Visible)
    {
        WebViewBrush b = new WebViewBrush();
        b.SourceName = "WebView6";
        b.Redraw();
        Rect1.Fill = b;
        WebView6.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
    }
}

void ComboBox1_DropDownClosed(object sender, object e)
{
    WebView6.Visibility = Windows.UI.Xaml.Visibility.Visible;
    Rect1.Fill = new SolidColorBrush(Windows.UI.Colors.Transparent);
}

Private Sub ComboBox1_DropDownOpened(sender As Object, e As Object)
    If Rect1.Visibility = Windows.UI.Xaml.Visibility.Visible Then
        Dim b As New WebViewBrush()
        b.SourceName = "WebView6"
        b.Redraw()
        Rect1.Fill = b
        WebView6.Visibility = Windows.UI.Xaml.Visibility.Collapsed
    End If
End Sub

Private Sub ComboBox1_DropDownClosed(sender As Object, e As Object)
    WebView6.Visibility = Windows.UI.Xaml.Visibility.Visible
    Rect1.Fill = New SolidColorBrush(Windows.UI.Colors.Transparent)
End Sub

注解

在 Windows 8 中， WebView 控件具有一个特征，即其他 UI 区域（如控件）不能在它之上呈现。 这是因为窗口区域在内部的处理方式，特别是处理输入事件的方式和屏幕绘制方式。 如果要呈现 HTML 内容并将其他 UI 元素放在该 HTML 内容之上，则应使用 WebViewBrush 作为呈现区域。 WebView 仍提供 HTML 源信息，你通过 SourceName 属性 (或通过调用 SetSource 引用该 WebView，方法和属性) 生成相同的结果。 WebViewBrush 没有此覆盖限制，但它不启用交互。

可以将 WebViewBrush 应用于采用 Brush 的任何属性。 例如，可以使用 WebViewBrush 设置 Shape.Fill 或 Control.Background 。

将 WebViewBrush 与 WebView 控件源 关联有两种替代方法：

• 通过设置 SourceName 属性，按其标识符名称引用 源 WebView 。
• 通过引用引用、通过调用 SetSource 方法和传递 WebView 对象来引用源 WebView。

Windows Phone 8.x 不支持此类。 不会捕获 WebView 内容。

构造函数

属性

方法

适用于

另请参阅

• TileBrush
• Brush
• WebView
• 使用画笔
• XAML WebView 控件示例