您可以使用Caliburn.Micro（WinRT）绑定到ImageBrush的ImageSource属性吗？

问题描述

我希望在Caliburn.Micro中使用动态背景图像。这是我没有成功的尝试。

I was hoping to use dynamic background images with Caliburn.Micro. This is what I have tried without success.

<Grid>
 <Grid.Background>
   <ImageBrush x:Name="MyPhoto" />
 </Grid.Background>
</Grid>

//some view model
public class ImageViewModel
{
   public ImageSource MyPhoto {get;set;}
}

//Add Convention
//App.XAML.cs
...
public override void Configure()
{
  ...

        ConventionManager.AddElementConvention<ImageBrush>(ImageBrush.ImageSourceProperty, "ImageSource", "Loaded");
  ...
}

是否可以将ImageBrush的ImageSource与Caliburn.Micro还是有更好的方法呢？

Is it possible to bind and ImageBrush's ImageSource with Caliburn.Micro or is there a better way to do this?

推荐答案

不确定，但我认为 AddElementConvention 仅适用于 UIElement 不是 DependencyObject s。但这应该可行：

Not sure but I think AddElementConvention works only for UIElements not DependencyObjects. This should work, though:

MainPage.xaml ：

<Grid x:Name="MyBrush">
</Grid>

MainPageViewModel.cs ：

public class MainPageViewModel : Screen
{
    public MainPageViewModel()
    {
        MyPhoto = new BitmapImage(new Uri("ms-appx:///Assets/SplashScreen.png"));
    }

    public ImageSource MyPhoto { get; set; }

    public ImageBrush MyBrush
    {
        get
        {
            ImageBrush brush = new ImageBrush();
            brush.ImageSource = MyPhoto;
            return brush;
        }
    }
}

App.xaml.cs ：

protected override void Configure()
{
    container = new WinRTContainer();
    container.RegisterWinRTServices();

    ConventionManager.AddElementConvention<Grid>(Grid.BackgroundProperty, "Background", "Loaded");
}

或者，您也可以在XAML中手动进行绑定：

Alternatively you could do the binding by hand in XAML:

<Grid>
    <Grid.Background>
        <ImageBrush ImageSource="{Binding MyPhoto}" />
    </Grid.Background>
</Grid>

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