c# - 以编程方式在按钮上设置图像

Question

我在按钮上以编程方式设置图像时遇到问题。我有下一个 WPF 按钮:

<Button Name="MyBtn" x:FieldModifier="public" HorizontalAlignment="Center" VerticalAlignment="Center" Click="FlashOnOf_Click" Height="256" Width="256" BorderBrush="{x:Null}"/>

并尝试在下一个案例中设置图像:

        var brush = new ImageBrush();
        brush.ImageSource = new BitmapImage(new Uri("ms-appx://Assets/light_bulb_off.png"));
        brush.Stretch = Stretch.Fill;

        MyBtn.Background = brush;

还有一个案例:

        MyBtn.Content = new Image
        {
            Source = new BitmapImage(new Uri("ms-appx://Assets/light_bulb_off.png")),
            VerticalAlignment = VerticalAlignment.Center,
            Stretch = Stretch.Fill,
            Height = 256,
            Width = 256
        };

同样没有运气。我有什么错误的想法吗？

Answer 1

你应该像这样设置图像:

private void btn_Click(object sender, RoutedEventArgs e)
{
    btn.Content = new Image
    {              
        Source = new BitmapImage(new Uri("/WpfApplication1;component/image/add.jpg", UriKind.Relative)),
        VerticalAlignment = VerticalAlignment.Center,
        Stretch = Stretch.Fill,
        Height = 256,
        Width = 256
    };
}

其中 Uri("/WpfApplication1;component/image/add.jpg" 是图像的地址，WpfApplication 是您的 WPF 应用程序的名称，image 为文件夹，add.jpg 为图片名称。

基本方法如下所示:

Button myButton = new Button
{
    Width = 50,
    Height = 50,
    Content = new Image
    {
        Source = new BitmapImage(new Uri("image source")),
        VerticalAlignment = VerticalAlignment.Center
    }
};