自定义控件依赖项属性绑定
自定义控件依赖项属性绑定
提问于 2012-08-10 14:37:16
即使是最基本的例子，我也想让它正常工作，这简直要疯了。我无论如何也不能让绑定起作用。这里有一个超级简单的例子，它对我来说不起作用。我一定是做错了什么。
我的控件库程序集中的自定义控件：
public class TestControl : Control
{
public static readonly DependencyProperty TestPropProperty =
DependencyProperty.Register("TestProp", typeof(string), typeof(TestControl), new UIPropertyMetadata(null));
public string TestProp
{
get { return (string)GetValue(TestPropProperty); }
set { SetValue(TestPropProperty, value); }
}
static TestControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(TestControl), new FrameworkPropertyMetadata(typeof(TestControl)));
}
}及其XAML模板：
<Style TargetType="{x:Type local:TestControl}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:TestControl}">
<Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
<StackPanel>
<TextBlock Text="Testing..." />
<Label Content="{Binding TestProp}" Padding="10" />
</StackPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>下面是在wpf窗口中使用控件的XAML，它引用了我的控件库：
<Grid>
<ItemsControl Name="mylist">
<ItemsControl.ItemTemplate>
<DataTemplate>
<my:TestControl TestProp="{Binding Path=Name}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>下面是后面的代码：
public partial class Test2 : Window
{
public class TestObject : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string PropertyName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(PropertyName));
}
private int _id;
public int id
{
get { return _id; }
set { _id = value; OnPropertyChanged("id"); }
}
private string _Name;
public string Name
{
get { return _Name; }
set { _Name = value; OnPropertyChanged("Name"); }
}
}
public Test2()
{
InitializeComponent();
mylist.ItemsSource = new TestObject[]
{
new TestObject(){ id = 1, Name = "Tedd" },
new TestObject(){ id = 2, Name = "Fred" },
new TestObject(){ id = 3, Name = "Jim" },
new TestObject(){ id = 4, Name = "Jack" },
};
}
}运行此示例将给出该控件的四个实例，但我只看到"Testing...“每个都有TextBlock。我的标签永远不会被绑定。我误解和做错了什么？
回答 1
Stack Overflow用户
回答已采纳
发布于 2012-08-10 14:45:57
您尚未设置正确的绑定源。您要么必须设置RelativeSource
<Label Content="{Binding TestProp, RelativeSource={RelativeSource Mode=TemplatedParent}}" />或者使用TemplateBinding
<Label Content="{TemplateBinding TestProp}"/>页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/11896619
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