由于某种原因，只有几个附加在媒体元素上的声音正在播放。代码运行并正确地击中所有内容但不会播放所有声音。所有媒体元素都在XAML中，并设置为内容，如果更新则复制。
XAML：
<Grid x:Name="LayoutRoot" Background="White" Margin="0,-1,0,0">
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="0">
<Grid.RowDefinitions>
<RowDefinition Height="85"/>
<RowDefinition Height="615*"/>
</Grid.RowDefinitions>
<TextBlock x:Name="Head" HorizontalAlignment="Left" Margin="10,0,0,0" TextWrapping="Wrap" Text="Electronic" VerticalAlignment="Bottom" FontFamily="Segoe WP Light" FontSize="60" RenderTransformOrigin="0.567,0.259" Height="85" Width="283" Foreground="#FF1BA1E2"/>
<Grid Grid.Row="1" Background="#FFE9E9E9">
<telerikPrimitives:RadUniformGrid NumberOfColumns="1" NumberOfRows="8">
<StackPanel Orientation="Horizontal">
<Button x:Name="Aftershock" BorderBrush="{x:Null}" Tap="Button_Tap_1">
<Rectangle Fill="#FF1BA1E2" Stroke="#FF1BA1E2" Width="75" Height="75" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle.OpacityMask>
<ImageBrush ImageSource="Assets/AppBar/Transport.Play.png"/>
</Rectangle.OpacityMask>
</Rectangle>
</Button>
<TextBlock Text="Aftershock" VerticalAlignment="Center" Margin="20,0,0,0" FontSize="35" Foreground="#DE000000" FontFamily="Segoe WP"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button x:Name="Conga" BorderBrush="{x:Null}" Tap="Button_Tap_1">
<Rectangle Fill="#FF1BA1E2" Stroke="#FF1BA1E2" Width="75" Height="75" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle.OpacityMask>
<ImageBrush ImageSource="Assets/AppBar/Transport.Play.png"/>
</Rectangle.OpacityMask>
</Rectangle>
</Button>
<TextBlock Text="Conga" VerticalAlignment="Center" Margin="20,0,0,0" FontSize="35" Foreground="#DE000000" FontFamily="Segoe WP"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button x:Name="Fever" BorderBrush="{x:Null}" Tap="Button_Tap_1">
<Rectangle Fill="#FF1BA1E2" Stroke="#FF1BA1E2" Width="75" Height="75" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle.OpacityMask>
<ImageBrush ImageSource="Assets/AppBar/Transport.Play.png"/>
</Rectangle.OpacityMask>
</Rectangle>
</Button>
<TextBlock Text="Fever" VerticalAlignment="Center" Margin="20,0,0,0" FontSize="35" Foreground="#DE000000" FontFamily="Segoe WP"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button x:Name="Lightspeed" BorderBrush="{x:Null}" Tap="Button_Tap_1">
<Rectangle Fill="#FF1BA1E2" Stroke="#FF1BA1E2" Width="75" Height="75" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle.OpacityMask>
<ImageBrush ImageSource="Assets/AppBar/Transport.Play.png"/>
</Rectangle.OpacityMask>
</Rectangle>
</Button>
<TextBlock Text="Lightspeed" VerticalAlignment="Center" Margin="20,0,0,0" FontSize="35" Foreground="#DE000000" FontFamily="Segoe WP"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button x:Name="Remember" BorderBrush="{x:Null}" Tap="Button_Tap_1">
<Rectangle Fill="#FF1BA1E2" Stroke="#FF1BA1E2" Width="75" Height="75" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle.OpacityMask>
<ImageBrush ImageSource="Assets/AppBar/Transport.Play.png"/>
</Rectangle.OpacityMask>
</Rectangle>
</Button>
<TextBlock Text="Remember" VerticalAlignment="Center" Margin="20,0,0,0" FontSize="35" Foreground="#DE000000" FontFamily="Segoe WP"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button x:Name="Synth" BorderBrush="{x:Null}" Tap="Button_Tap_1">
<Rectangle Fill="#FF1BA1E2" Stroke="#FF1BA1E2" Width="75" Height="75" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle.OpacityMask>
<ImageBrush ImageSource="Assets/AppBar/Transport.Play.png"/>
</Rectangle.OpacityMask>
</Rectangle>
</Button>
<TextBlock Text="Synth" VerticalAlignment="Center" Margin="20,0,0,0" FontSize="35" Foreground="#DE000000" FontFamily="Segoe WP"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button x:Name="Viper" BorderBrush="{x:Null}" Tap="Button_Tap_1">
<Rectangle Fill="#FF1BA1E2" Stroke="#FF1BA1E2" Width="75" Height="75" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle.OpacityMask>
<ImageBrush ImageSource="Assets/AppBar/Transport.Play.png"/>
</Rectangle.OpacityMask>
</Rectangle>
</Button>
<TextBlock Text="Viper" VerticalAlignment="Center" Margin="20,0,0,0" FontSize="35" Foreground="#DE000000" FontFamily="Segoe WP"/>
</StackPanel>
</telerikPrimitives:RadUniformGrid>
</Grid>
</Grid>
<MediaElement x:Name="AftershockSound" AutoPlay="False" Source="/Assets/Sounds/Electronic/Aftershock.mp3"/>
<MediaElement x:Name="CongaSound" AutoPlay="False" Source="/Assets/Sounds/Electronic/Conga.mp3"/>
<MediaElement x:Name="FeverSound" AutoPlay="False" Source="/Assets/Sounds/Electronic/Fever.mp3"/>
<MediaElement x:Name="LightspeedSound" AutoPlay="False" Source="/Assets/Sounds/Electronic/Lightspeed.mp3"/>
<MediaElement x:Name="RememberSound" AutoPlay="False" Source="/Assets/Sounds/Electronic/Remember.mp3"/>
<MediaElement x:Name="SynthSound" AutoPlay="False" Source="/Assets/Sounds/Electronic/Synth.mp3"/>
<MediaElement x:Name="ViperSound" AutoPlay="False" Source="/Assets/Sounds/Electronic/Viper.mp3"/>
</Grid>
C＃
private void Button_Tap_1(object sender, System.Windows.Input.GestureEventArgs e)
{
e.Handled = true;
var button = sender as Button;
string alarmName = button.Name;
switch (alarmName)
{
case "Aftershock":
AftershockSound.Stop();
AftershockSound.Play();
break;
case "Conga":
CongaSound.Stop();
CongaSound.Play();
break;
case "Fever":
FeverSound.Stop();
FeverSound.Play();
break;
case "Lightspeed":
LightspeedSound.Stop();
LightspeedSound.Play();
break;
case "RememberSound":
RememberSound.Stop();
RememberSound.Play();
break;
case "SynthSound":
SynthSound.Stop();
SynthSound.Play();
break;
case "Viper":
ViperSound.Stop();
ViperSound.Play();
break;
}
}
答案 0 :(得分：1)
处理所有音频文件的MediaOpened事件，并确保在引发MediaOpened事件后调用停止/播放方法。