我有一个的TextBlock 在的ScrollViewer 与舒展它的窗口对齐。我需要的的TextBlock 表现为以下几点：

我怎样才能得到这个功能？

我曾尝试多种方法，包括绑定 ActualWidth的＆放大器; 的ActualHeight ，但不能让它的工作。

这不能那么难，我缺少什么？

下面是一个code样品投入的XamlPad（无时了minWidth尚未设置）：

 ＆LT;窗​​口的xmlns =htt​​p://schemas.microsoft.com/winfx/2006/xaml/$p$psentation的xmlns：X =HTTP：//模式。 microsoft.com/winfx/2006/xaml">
    ＆LT;的ScrollViewer Horizo​​ntalScrollBarVisibility =自动VerticalScrollBarVisibility =自动＆GT;
            ＆LT; TextBlock的TextWrapping =自动换行文本=一些很长的文字，当你调整窗口或许应该换行 /＆GT;
    ＆LT; /的ScrollViewer＆GT;
＆LT; /窗＆GT;
 

解决方案

本作品：

 ＆LT;窗​​口的xmlns =htt​​p://schemas.microsoft.com/winfx/2006/xaml/$p$psentation的xmlns：X =HTTP：//模式。 microsoft.com/winfx/2006/xaml">
    ＆LT;的ScrollViewer Horizo​​ntalScrollBarVisibility =自动VerticalScrollBarVisibility =自动NAME =滚轮＆GT;
            ＆LT; TextBlock中的Horizo​​ntalAlignment =拉伸VerticalAlignment =拉伸了minWidth =100宽度={结合的ElementName =滚轮，路径= ViewportWidth}
            TextWrapping =自动换行文本=一些，当你调整窗口或许应该换行很长的文字。 /＆GT;
    ＆LT; /的ScrollViewer＆GT;
＆LT; /窗＆GT;
 

I have a TextBlock within a ScrollViewer that aligns with stretch to its window. I need the TextBlock to behave as the following:

How can I get this functionality?

I have tried several ways, involving bindings to ActualWidth & ActualHeight, but can't get it to work.

This can't be that difficult, what am I missing?

Here is a code sample to put in XamlPad (no MinWidth is set yet):

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
            <TextBlock TextWrapping="Wrap" Text="Some really long text that should probably wordwrap when you resize the window." />
    </ScrollViewer>
</Window>

This works:

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" Name="Scroller">
            <TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Stretch" MinWidth="100" Width="{Binding ElementName=Scroller, Path=ViewportWidth}"
            TextWrapping="Wrap" Text="Some really long text that should probably wordwrap when you resize the window." />
    </ScrollViewer>
</Window>