wpf 如何为 UIElement.Margin 上的绑定设置 FallbackValue？
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How do I set the FallbackValue for a Binding on UIElement.Margin?
提问by RoelF
Consider the following bit of code:
考虑以下代码：
<UserControl x:Name=root>
....
<TextBlock Text="Hello World" Margin="{Binding ElementName=root, Path=LeftButtonMargin}"/>
....
</UserControl>
Now, what is the syntax for setting the FallBackvalueon the Binding?
I've tried some different options already, but I cannot seem to find the correct syntax:
现在，在 Binding 上设置 的语法是什么FallBackvalue？
我已经尝试了一些不同的选项，但似乎找不到正确的语法：
Margin="{Binding ElementName=root, Path=LeftButtonMargin, FallBackValue={}10,10,0,0}"
Margin="{Binding ElementName=root, Path=LeftButtonMargin, FallBackValue={}{10,10,0,0}}"
Margin="{Binding ElementName=root, Path=LeftButtonMargin, FallBackValue={}"10,10,0,0"}"
Or is this not possible at all? Basically, I need these values at design time...
或者这根本不可能？基本上，我在设计时需要这些值......
采纳答案by Davut Gürbüz
Hopefully works,
希望有效，
<UserControl.Resources>
<Thickness x:Key="MyMargin" Bottom="5" Top="10">
</Thickness>
<UserControl.Resources>
<TextBlock Text="Hello World"
Margin="{Binding ...,FallBackValue={StaticResource MyMargin}}"/>
回答by Sergey
More simple: use single quotes
更简单：使用单引号
Margin="{Binding ElementName=root, Path=LeftButtonMargin, FallBackValue='10,10,0,0'}"
回答by stukselbax
This is works for me:
这对我有用：
<TextBlock Text="Hello World">
<TextBlock.Margin>
<Binding ElementName="root" Path="LeftButtonMargin" FallbackValue="10, 10, 0, 0" />
</TextBlock.Margin>
</TextBlock>
but its rather big...
但它相当大...
