Wpf 资源的动态变化，Windows Phone

我正在运行时对资源进行一些更改，以便为不同（物理）屏幕大小的应用程序做好准备：

var info = DisplayInformation.GetForCurrentView();
Size screenSize = new Size(Math.Round(Window.Current.Bounds.Width * info.RawPixelsPerViewPixel),
    Math.Round(Window.Current.Bounds.Height * info.RawPixelsPerViewPixel));

Application.Current.Resources["SmallerText"] = (1.0 / 15.0) * screenSize.Height / info.RawDpiY * 72;
Application.Current.Resources["SmallText"] = (1.0 / 12.0) * screenSize.Height / info.RawDpiY * 72;
Application.Current.Resources["MediumText"] = (1.0 / 10.0) * screenSize.Height / info.RawDpiY * 72;
Application.Current.Resources["LargeText"] = (1.0 / 5.0) * screenSize.Height / info.RawDpiY * 72;
var displayMargin = (1.0 / 320.0) * screenSize.Height;
Application.Current.Resources["DisplayMargin"] = new Thickness(displayMargin);

现在，当我尝试使用修改过的字体大小时，它可以工作：

但当我尝试使用修改后的厚度时，应用程序崩溃：

错误消息相当神秘：

An exception of type 'Windows.UI.Xaml.Markup.XamlParseException' occurred in MyApp.exe but was not handled in user code

WinRT information: Failed to assign to property '%0'. [Line: 17 Position: 50]

Additional information: The text associated with this error code could not be found.



Failed to assign to property '%0'. [Line: 17 Position: 50]

If there is a handler for this exception, the program may be safely continued.

为什么我不能使用修改后的厚度？如果我不从代码后面修改它，一切都正常工作

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编辑：变通方法

解决办法#1：

解决办法#2：

你在哪里调用此代码？@ChubosaurusSoftware App.xaml.csI我已经尝试了你的代码，它在我的手机上似乎工作正常--你能检查一下吗？

var displayMargin = (1.0 / 320.0) * screenSize.Height;
Application.Current.Resources.Remove("DisplayMargin");
Application.Current.Resources.Add("DisplayMargin", new Thickness(displayMargin));

<Grid Grid.Row="0" Margin="{ThemeResource DisplayMargin}">