以编程方式创建带有图像的按钮

Question

在XAML中，定义带有图像的按钮很容易：

<Button x:Name="btnSound"
        Click="SoundButton"
        Height="40"
        HorizontalAlignment="Left" 
        VerticalAlignment="Bottom" Margin="20,0">
    <Image x:Name="speakerImg" Source="/png/btn_speak_i.png" />
</Button>

我想在c#做到这一点：

// Prepare two BitmapImages
BitmapImage SoundDisable = new BitmapImage(new Uri("ms-appx:///png/btn_speak_i.png", 
    UriKind.RelativeOrAbsolute));
BitmapImage SoundEnable = new BitmapImage(new Uri("ms-appx:///png/btn_speak.png", 
    UriKind.RelativeOrAbsolute));

// Define and Load Button
btnSound = new Button();
btnSound.HorizontalAlignment = HorizontalAlignment.Left;
btnSound.VerticalAlignment = VerticalAlignment.Bottom;
Thickness margin = new Thickness(0,00,20,0);
btnSound.Margin = margin;
btnSound.Click += new RoutedEventHandler(btnSound_Click);
btnSound.IsEnabled = false;
topBar.Children.Add(btnSound);

我找不到将图像添加到按钮的方法。 就像是

btnSound.Content = SoundDisable; 

不管用。 它仅显示按钮内图像类型的文本。 在XAML版本中，我使用

speakerImg.Source = SoundDisable;

因为图像是使用x:Name定义的。

如何以编程方式向按钮添加命名图像？

Answer 1

简单：添加一个Image ，然后将Image Source设置为BitmapImage 。

// Prepare two BitmapImages
BitmapImage SoundDisable = new BitmapImage(new Uri("ms-appx:///png/btn_speak_i.png", 
    UriKind.RelativeOrAbsolute));
BitmapImage SoundEnable = new BitmapImage(new Uri("ms-appx:///png/btn_speak.png", 
    UriKind.RelativeOrAbsolute));

// Define and Load Button
btnSound = new Button();
btnSound.HorizontalAlignment = HorizontalAlignment.Left;
btnSound.VerticalAlignment = VerticalAlignment.Bottom;
Thickness margin = new Thickness(0,00,20,0);
btnSound.Margin = margin;
btnSound.Click += new RoutedEventHandler(btnSound_Click);
btnSound.IsEnabled = false;

var image = new Image(); image.Source = SoundDisable; btnSound.Content = image;

topBar.Children.Add(btnSound);

更改图像：

((Image)btnSound.Content).Source = SoundEnable;