我尝试使用MenuItem.Icon设置主窗口的背景[通过MenuItem控件]。问题是MenuItem.Icon是对象,而Mainwindow.Background是 Brush (或Brush Control)类型。 有没有办法在这两者之间进行转换?我已经尝试过BrushConverter.ConvertFrom,但它无法转换Image对象(即显示的Exception消息)。谢谢!这是一些XAML代码:
<MenuItem Header="Waterfall" Click="BackgroundMenuItem_Click">
<MenuItem.Icon>
<Image Source="images/backgrounds/Waterfall.jpg"/>
</MenuItem.Icon>
</MenuItem>
以及后面的代码:
//switch background:
//event
private void BackgroundMenuItem_Click(object sender, RoutedEventArgs e)
{
try
{
BackgroundMenuItem_Switch((MenuItem)sender, e);
}
catch(Exception exc)
{ MessageBox.Show(exc.Message); }
}
//switch func
private void BackgroundMenuItem_Switch(MenuItem sender, RoutedEventArgs e)
{
var converter = new BrushConverter();
var brush = converter.ConvertFrom(sender.Icon);
this.Background = (Brush)brush;
}
答案 0 :(得分:2)
您可以从图片中创建ImageBrush。
private void BackgroundMenuItem_Switch(MenuItem sender, RoutedEventArgs e)
{
this.Background = new ImageBrush(((Image)(sender.Icon)).Source);
}
答案 1 :(得分:1)
您可以使用ImageBrush:
<Window ...>
<Window.Background>
<ImageBrush ImageSource="img/0.png" />
</Window.Background>
...
</Window>
Background = new ImageBrush() { ImageSource = new BitmapImage(new Uri("img/1.png", UriKind.RelativeOrAbsolute)) };
或者,如果您使用的是图像资源,请使用包URI:
Background = new ImageBrush() { ImageSource = new BitmapImage(new Uri("pack://application:,,,/img/x.png", UriKind.RelativeOrAbsolute)) };