在样式设置器中设置自定义附加属性 [英] Set custom attached property in style setter
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问题描述
我试图在样式中设置附加属性,我想用它们来附加行为.但是我无法让它工作.代码如下:
Im trying to set attached property inside a style, i want to use them to attach behaviour. However I cant get it to work. Heres code:
附加属性
public class TestBehaviour
{
public static bool GetTest(Grid grid)
{
return (bool)grid.GetValue(TestProperty);
}
public static void SetTest(Grid grid, bool value)
{
grid.SetValue(TestProperty, value);
}
public static readonly DependencyProperty TestProperty = DependencyProperty.RegisterAttached("Test", typeof(bool), typeof(Grid));
}
XML
<Window x:Class="AttachedPropertyTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:test="clr-namespace:AttachedPropertyTest"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.Style>
<Style TargetType="Grid">
<Setter Property="test:TestBehaviour.Test" Value="true"></Setter>
</Style>
</Grid.Style>
</Grid>
推荐答案
附加属性的所有者类型必须是声明它所在的类,这里是TestBehaviour
,而不是Grid代码>.将声明更改为:
The owner type of the attached property must be the class where it is declared, which is TestBehaviour
here, not Grid
. Change the declaration to:
public static readonly DependencyProperty TestProperty =
DependencyProperty.RegisterAttached("Test", typeof(bool), typeof(TestBehaviour));
有关 RegisterAttached,请参阅 MSDN 文档:
See the MSDN documentation for RegisterAttached:
ownerType - 注册依赖属性的所有者类型
ownerType - The owner type that is registering the dependency property
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