访问WPF UserControl子元素属性 [英] Accessing WPF UserControl child element property
问题描述
假设我有一个带有几个子控件的UserControl
Let's say I have a UserControl with several child controls
<UserControl x:Class="Any.AnyControl"
<Grid>
<Label Name="label1" Background="Black" />
... more controls here
</Grid>
</UserControl>
我在MainWindow中像这样使用它:
and I use it in MainWindow like so:
<Window>
<Grid>
<local:AnyControl/>
// I want to access AnyControl label1 Background property here
</Grid>
</Window>
我知道如何在代码隐藏中访问AnyControl label1 Background属性,但是有什么方法可以在父XAML中访问它?
I know how I can access AnyControl label1 Background property in code-behind, but is there any way I can access it in parent XAML?
我的代码:在父级XAML中
my code now: in parent XAML
<local:AlertControl LabelBackground="Blue">
在用户控件中
<Label Background="{Binding LabelBackground, RelativeSource={RelativeSource AncestorType=UserControl}}" />
也尝试一下
<Label Background="{Binding LabelBackground, RelativeSource={RelativeSource AncestorType=local:AlertControl}}" />
推荐答案
尝试这样(尽管在其父控件中设置控件样式不是最佳做法):
Try like this (although it's not the best practice to style controls in their parent control):
<local:AnyControl>
<local:AnyControl.Resources>
<Style TargetType="{x:Type Label}">
<Setter Property="Background" Value="Red" />
</Style>
</local:AnyControl.Resources>
</local:AnyControl>
它为UserControl中给定类型的所有控件设置background属性.如果要为通过名称选择的控件进行更改,可以执行类似的操作(将 Value ="Test"
更改为控件的名称):
It sets the background property for all controls of a given type inside your UserControl. If you want to change it for a control selected by a name, you can do something like that (change Value="Test"
to your control's name):
<local:AnyControl>
<local:AnyControl.Resources>
<Style TargetType="{x:Type Label}">
<Style.Triggers>
<Trigger Property="Name" Value="Test">
<Setter Property="Background" Value="Red" />
</Trigger>
</Style.Triggers>
</Style>
</local:AnyControl.Resources>
</local:AnyControl>
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