blocks|key|2530401|text|嵌套堆栈板将导致文本框正确换行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2530402|<Viewbox+Margin="120,0,120,0">
++++<StackPanel+Orientation="Vertical"+Width="400">
++++++++<TextBlock+x:Name="subHeaderText"+
+++++++++++++++++++FontSize="20"+
+++++++++++++++++++TextWrapping="Wrap"+
+++++++++++++++++++Foreground="Black"
+++++++++++++++++++Text="Lorem+ipsum+dolor,+lorem+isum+dolor,Lorem+ipsum+dolor+sit+amet,+lorem+ipsum+dolor+sit+amet+"+/>
++++</StackPanel>
</Viewbox>|code-block|syntax|javascript|2530403|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Nesting a stackpanel will cause the textbox to wrap properly:

<pre><code>&lt;Viewbox Margin="120,0,120,0"&gt;
 &lt;StackPanel Orientation="Vertical" Width="400"&gt;
 &lt;TextBlock x:Name="subHeaderText" 
 FontSize="20" 
 TextWrapping="Wrap" 
 Foreground="Black"
 Text="Lorem ipsum dolor, lorem isum dolor,Lorem ipsum dolor sit amet, lorem ipsum dolor sit amet " /&gt;
 &lt;/StackPanel&gt;
&lt;/Viewbox&gt;
</code></pre>

blocks|key|49426|text|这在一定程度上解决了这个问题。没有ActualFontSize属性，但有一个与FontSize相关的ActualHeight。现在，这只是原始渲染的大小。我不知道如何将Converter注册为resize事件。实际上可能需要将FontSize注册为resize事件。请不要因为我的回答不完整而贬低我。我不能将代码样本放在注释中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|49427|++++<Window.Resources>
++++++++<local:WidthConverter+x:Key="widthConverter"/>
++++</Window.Resources>
++++<Grid>
++++++++<Grid>
++++++++++++<StackPanel+VerticalAlignment="Center"+Orientation="Vertical"+>
++++++++++++++++<Viewbox+Margin="100,0,100,0">
++++++++++++++++++++<TextBlock+x:Name="headerText"+Text="Lorem+ipsum+dolor"+Foreground="Black"/>
++++++++++++++++</Viewbox>
++++++++++++++++<TextBlock+Margin="150,0,150,0"+FontSize="{Binding+ElementName=headerText,+Path=ActualHeight,+Converter={StaticResource+widthConverter}}"+x:Name="subHeaderText"+Text="Lorem+ipsum+dolor,+Lorem+ipsum+dolor,+lorem+isum+dolor,+Lorem+ipsum+dolor,+Lorem+ipsum+dolor,+lorem+isum+dolor,+"+TextWrapping="Wrap"+Foreground="Gray"+/>
++++++++++++</StackPanel>
++++++++</Grid>
++++</Grid>++++++++|code-block|syntax|javascript|49428|转换器|offset|length|style|BOLD|49429|++++[ValueConversion(typeof(double),+typeof(double))]
++++public+class+WidthConverter+:+IValueConverter
++++{
++++++++public+object+Convert(object+value,+Type+targetType,+object+parameter,+CultureInfo+culture)
++++++++{
++++++++++++double+width+=+(double)value*.7;
++++++++++++return+width;+//+columnsCount;
++++++++}

++++++++public+object+ConvertBack(object+value,+Type+targetType,+object+parameter,+CultureInfo+culture)
++++++++{
++++++++++++throw+new+NotImplementedException();
++++++++}
++++}+|49430|entityMap^0|0|0|0|3|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

This gets part way there. There is no ActualFontSize property but there is an ActualHeight and that would relate to the FontSize. Right now this only sizes for the original render. I could not figure out how to register the Converter as resize event. Actually maybe need to register the FontSize as a resize event. Please don't mark me down for an incomplete answer. I could not put code sample in a comment. 

<pre><code> &lt;Window.Resources&gt;
 &lt;local:WidthConverter x:Key="widthConverter"/&gt;
 &lt;/Window.Resources&gt;
 &lt;Grid&gt;
 &lt;Grid&gt;
 &lt;StackPanel VerticalAlignment="Center" Orientation="Vertical" &gt;
 &lt;Viewbox Margin="100,0,100,0"&gt;
 &lt;TextBlock x:Name="headerText" Text="Lorem ipsum dolor" Foreground="Black"/&gt;
 &lt;/Viewbox&gt;
 &lt;TextBlock Margin="150,0,150,0" FontSize="{Binding ElementName=headerText, Path=ActualHeight, Converter={StaticResource widthConverter}}" x:Name="subHeaderText" Text="Lorem ipsum dolor, Lorem ipsum dolor, lorem isum dolor, Lorem ipsum dolor, Lorem ipsum dolor, lorem isum dolor, " TextWrapping="Wrap" Foreground="Gray" /&gt;
 &lt;/StackPanel&gt;
 &lt;/Grid&gt;
 &lt;/Grid&gt; 
</code></pre>

Converter

<pre><code> [ValueConversion(typeof(double), typeof(double))]
 public class WidthConverter : IValueConverter
 {
 public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
 {
 double width = (double)value*.7;
 return width; // columnsCount;
 }

 public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
 {
 throw new NotImplementedException();
 }
 } 
</code></pre>

blocks|key|50324|text|如果你只是想让你的页眉字体比其他字体稍大一点，你可以使用ScaleTransform。所以你不需要依赖真正的字体大小。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|50325|+<TextBlock+x:Name="headerText"+Text="Lorem+ipsum+dolor">
++++++++++++++++<TextBlock.LayoutTransform>
++++++++++++++++++++<ScaleTransform+ScaleX="1.1"+ScaleY="1.1"+/>
++++++++++++++++</TextBlock.LayoutTransform>
++</TextBlock>|code-block|syntax|javascript|50326|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you just want to have your header font a little bit bigger then the rest, you can use ScaleTransform. so you do not depend on the real fontsize.

<pre><code> &lt;TextBlock x:Name="headerText" Text="Lorem ipsum dolor"&gt;
 &lt;TextBlock.LayoutTransform&gt;
 &lt;ScaleTransform ScaleX="1.1" ScaleY="1.1" /&gt;
 &lt;/TextBlock.LayoutTransform&gt;
 &lt;/TextBlock&gt;
</code></pre>

blocks|key|2740238|text|使用TextBlock元素的属性TextWrapping：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2740239|<TextBlock+Text="StackOverflow+Forum"
+++++++++++Width="100"
+++++++++++TextWrapping="WrapWithOverflow"/>|code-block|syntax|javascript|2740240|entityMap^0|2|9|G|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

Use the property <code>TextWrapping</code> of the <code>TextBlock</code> element:

<pre><code>&lt;TextBlock Text="StackOverflow Forum"
 Width="100"
 TextWrapping="WrapWithOverflow"/&gt;
</code></pre>

blocks|key|2530563|text|使用换行符：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2530564|<TextBlock>
++++++++<Run+Text="Line1"/>
++++++++<LineBreak/>
++++++++<Run+Text="Line2"+FontStyle="Italic"+FontSize="9"/>
++++++++<LineBreak/>
++++++++<Run+Text="Line3"/>
++++</TextBlock>|code-block|syntax|javascript|2530565|参考：https://social.msdn.microsoft.com/Forums/vstudio/en-US/51a3ffe4-ec82-404a-9a99-6672f2a6842b/how-to-give-multiline-in-textblock?forum=wpf|offset|length|2530566|谢谢,|2530567|RDV|2530568|entityMap|0|LINK|mutability|MUTABLE|url|https://social.msdn.microsoft.com/Forums/vstudio/en-US/51a3ffe4-ec82-404a-9a99-6672f2a6842b/how-to-give-multiline-in-textblock?forum=wpf^0|0|0|3|3S|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

Use Linebreak:

<pre><code>&lt;TextBlock&gt;
 &lt;Run Text="Line1"/&gt;
 &lt;LineBreak/&gt;
 &lt;Run Text="Line2" FontStyle="Italic" FontSize="9"/&gt;
 &lt;LineBreak/&gt;
 &lt;Run Text="Line3"/&gt;
 &lt;/TextBlock&gt;
</code></pre>

Refer this: <a href="https://social.msdn.microsoft.com/Forums/vstudio/en-US/51a3ffe4-ec82-404a-9a99-6672f2a6842b/how-to-give-multiline-in-textblock?forum=wpf" rel="noreferrer">https://social.msdn.microsoft.com/Forums/vstudio/en-US/51a3ffe4-ec82-404a-9a99-6672f2a6842b/how-to-give-multiline-in-textblock?forum=wpf</a>

Thanks,

RDV

i have a wpf window where i have a stackpanel with two viewports in it - each Viewport with a textblock in it.

<pre><code>&lt;Grid&gt;
 &lt;StackPanel VerticalAlignment="Center" Orientation="Vertical" &gt;
 &lt;Viewbox Margin="100,0,100,0"&gt;
 &lt;TextBlock x:Name="headerText" Text="Lorem ipsum dolor" Foreground="Black"/&gt;
 &lt;/Viewbox&gt;
 &lt;Viewbox Margin="150,0,150,0"&gt;
 &lt;TextBlock x:Name="subHeaderText" Text="Lorem ipsum dolor, Lorem ipsum dolor, lorem isum dolor, Lorem ipsum dolor, Lorem ipsum dolor, lorem isum dolor, " TextWrapping="Wrap" Foreground="Gray" /&gt;
 &lt;/Viewbox&gt;
 &lt;/StackPanel&gt;
&lt;/Grid&gt;
</code></pre>

What i would like to achieve is that the top textblock is the heading with a bigger text. The second textblock is the sub heading with a smaller text. No matter how much text there is for either the heading or the subheading the font should dynamic become smaller/bigger. My problem is that i would like the subheading to be fixed width. This means that, the font should be a percentage (70%) of the heading and wrap to multiple lines, depending on how much text i have. I enclosed the code I have thus far... im missing something with that subheading, cant figure out what. Cheers

Edit
Basically what i want achieve is that the sub header wraps the text so it can expand it downwards with the font being a 70% of the heading - no matter how big that font is.

How do I make a WPF TextBlock show my text on multiple lines?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个wpf窗口，其中有一个堆栈面板，其中有两个视口-每个视口中都有一个文本块。<Grid> <StackPanel VerticalAlignment="Center" Orientation="Vertical" > <Viewbox Margin="100,0,100,0"> ...

问如何使WPF TextBlock在多行上显示我的文本？
EN

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问如何使WPF TextBlock在多行上显示我的文本？EN