我试图添加一个Image作为UserControl的背景。根据我需要更改背景的变量值,但无论我使用的路径或Uri格式如何,背景都不会改变。
我在stackoverflow中看到了很多问题,但没有一个能解决我的问题。 我让下面的代码:
if (callback.liveUvis.ContainsUVI(uvi))
{
this.Status.Text = "LIVE";
ImageBrush imgB = new ImageBrush();
BitmapImage btpImg = new BitmapImage();
btpImg.UriSource = new Uri(@"///IMG///Live///bck_frame_info_video_live.png", UriKind.Relative);
//imgB.ImageSource = new BitmapImage(new Uri("~/IMG/Live/bck_frame_info_video_live.png", UriKind.RelativeOrAbsolute));
//imgB.ImageSource = new BitmapImage(new Uri("ms-appx:///IMG/Live/bck_frame_info_video_live.png"));
imgB.ImageSource = btpImg;
this.Background = imgB;
}
我在尝试附加图片时遇到同样的问题...我猜它也适用于Uri格式,但我也让代码过以防万一:)
private void setIcon_Desc(string dd)
{
try
{
Image img = new Image();
img.Source = new BitmapImage(new Uri(this.BaseUri, "IMG/pictos_small/white/160dpi/" + dd + ".png"));
img.Stretch = Stretch.None;
this.Icon = img;
this.Sport.Text = callback.disc.getDescription(dd).ToUpper();
}
catch(Exception ex)
{
callback.exception.writeExceptions(ex);
}
}
提前致谢!
答案 0 :(得分:5)
我可以在更改用户控件的背景时重现您的问题。
我使用的当前解决方法是更改控件中根UIElement的背景。
<Grid x:Name="container">
<Grid.Background>
<ImageBrush Stretch="Fill" ImageSource="Images/bg-blue.png"/>
</Grid.Background>
<StackPanel>
<TextBlock>Hello World</TextBlock>
<Button Click="Button_Click">Change Background</Button>
<Image x:Name="display"></Image>
</StackPanel>
</Grid>
public sealed partial class MyUserControl : UserControl
{
public MyUserControl()
{
this.InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
ImageBrush imgB = new ImageBrush();
BitmapImage btpImg = new BitmapImage();
btpImg.UriSource = new Uri(@"ms-appx:///images/bg-light-blue.png");
imgB.ImageSource = btpImg;
container.Background = imgB;
}
}