我想绑定从Window派生的类(MainWindow)的属性(MyTitle)的值。我创建了一个名为MyTitleProperty的依赖项属性,实现了INotifyPropertyChanged接口并修改了MyTitle的set方法来调用PropertyChanged事件,并将“MyTitle”作为属性名称参数传递。我在构造函数中将MyTitle设置为“Title”,但当窗口打开时标题为空。如果我在Loaded事件上放置了一个断点,那么MyTitle =“Title”,但this.Title =“”。这肯定是我没有注意到的令人难以置信的显而易见的事情。请帮忙!WPF绑定属性窗口的标题
MainWindow.xaml
<Window
x:Class="WindowTitleBindingTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:this="clr-namespace:WindowTitleBindingTest"
Height="350"
Width="525"
Title="{Binding Path=MyTitle, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type this:MainWindow}}}"
Loaded="Window_Loaded">
<Grid>
</Grid>
</Window>
MainWindow.xaml.cs:
public partial class MainWindow : Window, INotifyPropertyChanged
{
public static readonly DependencyProperty MyTitleProperty = DependencyProperty.Register("MyTitle", typeof(String), typeof(MainWindow));
public String MyTitle
{
get { return (String)GetValue(MainWindow.MyTitleProperty); }
set
{
SetValue(MainWindow.MyTitleProperty, value);
OnPropertyChanged("MyTitle");
}
}
public MainWindow()
{
InitializeComponent();
MyTitle = "Title";
}
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(String propertyName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
}
}
哪里是你的DataContext被设置? – Khan 2012-03-07 15:01:58
相对WPF新手。我之前完成了一些绑定,并且从来没有设置过它。我是否打算设置它?我会怎样设置它? – 2012-03-07 15:07:43
所以我刚刚有了一个快速谷歌,似乎增加的DataContext =这一点;给我的构造函数解决我的问题。谢谢杰夫! – 2012-03-07 15:20:32