具有DataContext和DependencyProperty的UserControl [英] UserControl with DataContext and DependencyProperty
本文介绍了具有DataContext和DependencyProperty的UserControl的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想将DependencyProperty和DataContext绑定到我的UserControl。 DataContext工作正常,但是设置DependencyProperty无效。这是我的UserControl:
I want to bind a DependencyProperty and DataContext to my UserControl. DataContext is working, but Setting the DependencyProperty has no effect. This is my UserControl:
<MyProperty:MyPropertyControl DataContext="{Binding SelectedPerson}" IsEnabled="True"/>
这是我的UserControl的代码背后:
And this is the CodeBehind of my UserControl:
public static readonly DependencyProperty IsEnabledProperty =
DependencyProperty.Register(
"IsEnabled",
typeof(Boolean),
typeof(MyProperty:MyPropertyControl),
new FrameworkPropertyMetadata()
{
DefaultValue = false,
BindsTwoWayByDefault = false,
DefaultUpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
});
public MyPropertyControl()
{
InitializeComponent();
}
public Boolean IsEnabled
{
get { return (Boolean)GetValue(IsEnabledProperty); }
set
{
SetValue(IsEnabledProperty, value);
NotifyPropertyChanged("IsEnabled");
}
}
我可以将属性IsEnabled设置为true或false,
I can set the property IsEnabled to true or false, but it has no effect.
用户控制代码:
<Button Content="Test" Width="100" Height="30" IsEnabled="{Binding IsEnabled}" />
推荐答案
您必须设置绑定到UserControl,例如像这样:
You'll have to set the source object of the Binding to the UserControl, e.g. like this:
<Button ... IsEnabled="{Binding IsEnabled,
RelativeSource={RelativeSource AncestorType=UserControl}}" />
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