RichTextBlockOverflow.HasOverflowContent在Windows 8 Metro應用程序中始終爲false

Question

因爲您必須在Windows 8 Metro應用程序中支持多種屏幕分辨率我想分割我的RichTextBlock以顯示將在RichTextBlockOverflow控件（或多個控件，取決於我必須展示多少文本）。 爲了確定是否需要顯示額外的RichTextBlockOverflow-Control，我檢查了我的RichTextBlocks的HasOverflowContent-Property的 。但它總是返回false。

這是超級容易重現：

• 創建一個新的 「Windows應用商店 - >空白應用程序」

• 與下面的代碼替換MainPage.xaml中的XAML：

  <StackPanel Orientation="Horizontal" Background="{StaticResource ApplicationPageBackgroundThemeBrush}"> 
      <RichTextBlock x:Name="test1" Width="100" Height="300" OverflowContentTarget="{Binding ElementName=test}"> 
       <Paragraph> 
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        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 
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        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> 
  

然後去隱藏文件（MainPage.xaml.cs中）的代碼，該代碼替換構造：

public MainPage() 
{ 
    this.InitializeComponent(); 
    if (test.HasOverflowContent) 
    { 
     // Will never be entered 
    } 
    if (test1.HasOverflowContent) 
    { 
     // Will never be entered 
    } 
} 

中設置斷點上this.InitializeComponent（），看看如何HasOverflowContent永遠是真實的。

我在做什麼錯？或者它是.NET中的錯誤？

任何幫助將是非常讚賞;）

安迪

Answer 1

嘗試使用不同的事件，把你的代碼在Page_Loaded事件中，我能得到HasOverflowContent工作。