Question

我在Windows Phone Silverlight 8.1中制作了简单的应用程序。它看起来像带有液晶显示屏的手机键盘 - 看起来像屏幕，显示当前点击按钮的数量并播放该数字的音调。

我一直在寻找一段时间，但我没有找到具体的内容。

我有Play（）的问题;方法，因为它在我正在调试时执行，但在应用程序部署到我的设备后实时发现我没有听到...

我研究了很多主题，我可以说它取决于

mediaElementObject.CurrentState;

有时它处于“关闭”状态，有时处于“打开”状态（然后我会在调试时听到声音）。

C＃

private void KeypadButtonClick(object sender, RoutedEventArgs e)
    {
        Button currentButton = sender as Button;
        MediaElement keySound = null;
        if (currentButton != null)
        {
            string buttonContentValue = currentButton.Content.ToString();

            keySound = new MediaElement();
            ContentPanel.Children.Add(keySound);
            PlayTargetKeypadSound(buttonContentValue, keySound);
            RefreshNumber(buttonContentValue);
        }
        if (keySound != null)
        {
            ContentPanel.Children.Remove(keySound);
        }
    }

    private void PlayTargetKeypadSound(string buttonContentValue, MediaElement keySound)
    {
        String path = "/Assets/Sounds/keyNumber_" + buttonContentValue + ".wav";
        keySound.CurrentStateChanged += KeySoundOnCurrentStateChanged;
        keySound.Source = new Uri(path, UriKind.RelativeOrAbsolute);
        keySound.Volume = 1.0;
        keySound.AutoPlay = false;
    }

    private void KeySoundOnCurrentStateChanged(object sender, RoutedEventArgs routedEventArgs)
    {
        MediaElement sound = sender as MediaElement;
        if (sound != null) sound.Play();
    }

    private void RefreshNumber(string buttonContentValue)
    {
        NumberTextBlock.Text = buttonContentValue;
    }

XAML

<Grid x:Name="ContentPanel" Grid.Row="2" Margin="8,0,8,12">
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <!-- First Row -->
        <Button Click="KeypadButtonClick" Content="1" Style="{StaticResource KeypadButtonStyle}" />
        <Button Click="KeypadButtonClick" Content="2" Style="{StaticResource KeypadButtonStyle}" Grid.Column="1" />
        <Button Click="KeypadButtonClick" Content="3" Style="{StaticResource KeypadButtonStyle}" Grid.Column="2" />

        <!-- Second Row -->
        <Button Click="KeypadButtonClick" Content="4" Style="{StaticResource KeypadButtonStyle}" Grid.Row="1" />
        <Button Click="KeypadButtonClick" Content="5" Style="{StaticResource KeypadButtonStyle}" Grid.Row="1" Grid.Column="1" />
        <Button Click="KeypadButtonClick" Content="6" Style="{StaticResource KeypadButtonStyle}" Grid.Row="1" Grid.Column="2" />

        <!-- Third Row -->
        <Button Click="KeypadButtonClick" Content="7" Style="{StaticResource KeypadButtonStyle}" Grid.Row="2" />
        <Button Click="KeypadButtonClick" Content="8" Style="{StaticResource KeypadButtonStyle}" Grid.Row="2" Grid.Column="1" />
        <Button Click="KeypadButtonClick" Content="9" Style="{StaticResource KeypadButtonStyle}" Grid.Row="2" Grid.Column="2" />

        <!-- Fourth Row -->
        <Button Click="KeypadButtonClick" Content="*" Style="{StaticResource KeypadButtonStyle}" Grid.Row="3" />
        <Button Click="KeypadButtonClick" Content="0" Style="{StaticResource KeypadButtonStyle}" Grid.Row="3" Grid.Column="1" />
        <Button Click="KeypadButtonClick" Content="#" Style="{StaticResource KeypadButtonStyle}" Grid.Row="3" Grid.Column="2" />
    </Grid>

非常感谢帮助

Answer 1

确定。

我解决了......

<强> C＃

private void KeypadButtonClick(object sender, RoutedEventArgs e)
    {
        Button currentButton = sender as Button;
        if (currentButton != null)
        {
            string buttonContentValue = currentButton.Content.ToString();

            PlayTargetKeypadSound(buttonContentValue);
            RefreshNumber(buttonContentValue);
        }
    }

    private void PlayTargetKeypadSound(string buttonContentValue)
    {
        String path = "/Assets/Sounds/keyNumber_" + buttonContentValue + ".wav";
        KeySoundMediaElement.MediaOpened += KeySoundMediaElementOnMediaOpened;
        KeySoundMediaElement.Source = new Uri(path, UriKind.RelativeOrAbsolute);
    }

    private void KeySoundMediaElementOnMediaOpened(object sender, RoutedEventArgs routedEventArgs)
    {
        MediaElement sound = sender as MediaElement;
        if (sound != null) sound.Play();
    }

    private void RefreshNumber(string buttonContentValue)
    {
        NumberTextBlock.Text = buttonContentValue;
    }

<强> XAML

<!-- Fourth Row -->
        <Button Click="KeypadButtonClick" Content="*" Style="{StaticResource KeypadButtonStyle}" Grid.Row="3" />
        <Button Click="KeypadButtonClick" Content="0" Style="{StaticResource KeypadButtonStyle}" Grid.Row="3" Grid.Column="1" />
        <Button Click="KeypadButtonClick" Content="#" Style="{StaticResource KeypadButtonStyle}" Grid.Row="3" Grid.Column="2" />

        <MediaElement
            x:Name="KeySoundMediaElement"
            Volume="1"
            AutoPlay="False"
            />

Silverlight - 通过C＃添加MediaElement - 管理Play（）方法的时间短

1 个答案: