wpf 如何在 XAML 中定义和使用变量来定义颜色？
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How can I define and use a variable in XAML to define a color?
提问by Edward Tanguay
I have a number of elements in my XAML which define Foreground="#555"to be the color of faded text in a readonly textbox.
我的 XAML 中有许多元素将Foreground="#555"定义为只读文本框中褪色文本的颜色。
<TextBlock Text="{Binding SingularModelClassFileTitle}" Margin="0 10 0 0"/>
<TextBox Text="{Binding SingularModelClassFileName}"
HorizontalAlignment="Left"
IsReadOnly="True"
Foreground="#555"
Width="500"/>
<TextBox
VerticalScrollBarVisibility="Visible"
AcceptsReturn="True"
Width="500"
Height="100"
IsReadOnly="True"
Foreground="#555"
Text="{Binding SingularModelClassContent}"
HorizontalAlignment="Left"
Margin="0 0 0 20"/>
How can I put this value in a XAML variableand reference in each attribute it so that I only have to change it in one place?
如何将此值放入 XAML 变量并引用它的每个属性，以便我只需在一个地方更改它？
I'm thinking you can do something like this:
我想你可以做这样的事情：
<sys:String x:Key="ReadOnlyTextColor">#555</sys:String>
...
<TextBox Foreground="{StaticResource ReadOnlyTextColor}"/>
And what would be the property xmlns:sys=...reference for this?
对此的属性xmlns:sys=...参考是什么？
回答by Matt Hamilton
Try defining your color as a SolidColorBrush:
尝试将您的颜色定义为SolidColorBrush：
<SolidColorBrush x:Key="ReadOnlyTextBrush" Color="#555555" />
...
...
<TextBox Foreground="{StaticResource ReadOnlyTextColor}" />
回答by AlexDrenea
Sometimes you may need to define colors rather than brushes : (one case you would want this is to be able to define Gradients with color parameters) In that case you could just define them like this:
有时您可能需要定义颜色而不是画笔：（一种情况是您希望能够使用颜色参数定义渐变）在这种情况下，您可以像这样定义它们：
<Color x:Key="ButtonColor1">Blue</Color>
<Color x:Key="ButtonColor1">#AABBCC</Color>
<Color x:Key="ButtonColor1" A="0" R="124" G="111" B="44"/>
