零基础学通Silverlight4（9）：多媒体
时间：2010-10-13 来源：wanxl
Silverlight等软件，由于Silverlight软件，这是最基本的必要条件。
）继承自UIElent：获取或设置是否自动播放Source：获取或设置左右音量平衡比例，属性值为－1值，默认为0。
◎ BufferingProgress：获取或设置媒体的伸展模式。
◎ Volume音频：
<MediaElement x:Name="MyAudio" AutoPlay="True" Volume="1" Source="tt.mp3" Canvas.Left="59" Canvas.Top="102"/>
图9-1图9-1
图9-1图9-1
◎ 图9-2
◎ 图9-3
◎标记如下：
<Grid x:Name="LayoutRoot" Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="189*" />
<RowDefinition Height="36*" />
<RowDefinition Height="75*" />
</Grid.RowDefinitions>
<Border x:Name="bordVider" Margin="3" CornerRadius="3" Width="400" BorderBrush="Gray" HorizontalAlignment="Left" BorderThickness="1" >
<Border.Background>
<VideoBrush x:Name="brshMyVideo"/>
</Border.Background>
</Border>
<Button Name="btStart" HorizontalAlignment="Left" VerticalAlignment="Top" Grid.Row="1"
Width="78" Height="33"
Content="截屏" Height="33" HorizontalAlignment="Left" Margin="196,0,0,0" Name="btPing" VerticalAlignment="Top" Width="78" Grid.Row="1" FontSize="14" Click="btPing_Click" />
<Image Grid.Row="2" Height="70" HorizontalAlignment="Left" Margin="20,5,0,0" Name="imgMy" Stretch="UniformToFill" VerticalAlignment="Top" Width="99" />
</Grid>
</UserControl>
◎ 创建视频捕获源
capSource = new CaptureSource();
if (CaptureDeviceConfiguration.RequestDeviceAccess())
{
//关闭摄像头
capSource.Stop();
}
private void btPing_Click(object sender, RoutedEventArgs e)
{
if (capSource.State == CaptureState.Started)
{
WriteableBitmap wBitmap = new WriteableBitmap(bordVider, new MatrixTransform());
imgMy.Source = wBitmap;
}
}
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◎ 图9-3
◎标记如下：
<Grid x:Name="LayoutRoot" Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="189*" />
<RowDefinition Height="36*" />
<RowDefinition Height="75*" />
</Grid.RowDefinitions>
<Border x:Name="bordVider" Margin="3" CornerRadius="3" Width="400" BorderBrush="Gray" HorizontalAlignment="Left" BorderThickness="1" >
<Border.Background>
<VideoBrush x:Name="brshMyVideo"/>
</Border.Background>
</Border>
<Button Name="btStart" HorizontalAlignment="Left" VerticalAlignment="Top" Grid.Row="1"
Width="78" Height="33"
Content="截屏" Height="33" HorizontalAlignment="Left" Margin="196,0,0,0" Name="btPing" VerticalAlignment="Top" Width="78" Grid.Row="1" FontSize="14" Click="btPing_Click" />
<Image Grid.Row="2" Height="70" HorizontalAlignment="Left" Margin="20,5,0,0" Name="imgMy" Stretch="UniformToFill" VerticalAlignment="Top" Width="99" />
</Grid>
</UserControl>
◎ 创建视频捕获源
capSource = new CaptureSource();
if (CaptureDeviceConfiguration.RequestDeviceAccess())
{
//关闭摄像头
capSource.Stop();
}
private void btPing_Click(object sender, RoutedEventArgs e)
{
if (capSource.State == CaptureState.Started)
{
WriteableBitmap wBitmap = new WriteableBitmap(bordVider, new MatrixTransform());
imgMy.Source = wBitmap;
}
}
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