因为您必须在 Windows 8 Metro Apps 中支持多种屏幕分辨率，所以我想拆分我的 RichTextBlock 以显示将在 RichTextBlockOverflow 控件（或多个控件，取决于我必须显示多少文本）中被截断的文本。为了确定我是否必须显示额外的 RichTextBlockOverflow-Control，我检查了我的 RichTextBlocks 的 HasOverflowContent-Property。但它总是返回 false。
它非常容易重现：
- 创建一个新的“Windows 应用商店 -> 空白应用程序”
将 MainPage.xaml 的 xaml 替换为以下代码：
<StackPanel Orientation="Horizontal" Background="{StaticResource ApplicationPageBackgroundThemeBrush}"> <RichTextBlock x:Name="test1" Width="100" Height="300" OverflowContentTarget="{Binding ElementName=test}"> <Paragraph> lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s lkj halks dflkjha skld fkla hsdkl hfakl dsflk hasdkl fakl hsdklf halks dflka jhsdhfklaj hsdklf jhakls dflkaj hsdlkfjh alks dflkajh s </Paragraph> </RichTextBlock> <RichTextBlockOverflow x:Name="test" Width="100" Height="300" /> </StackPanel>
然后转到文件后面的代码 (MainPage.xaml.cs) 并用该代码替换构造函数：
public MainPage()
{
this.InitializeComponent();
if (test.HasOverflowContent)
{
// Will never be entered
}
if (test1.HasOverflowContent)
{
// Will never be entered
}
}
在 this.InitializeComponent() 中设置断点，看看 HasOverflowContent 永远不会为真。
我究竟做错了什么？或者它是.NET 中的一个错误？
任何帮助将不胜感激；）
和我