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我有这样的XAML:如何将WPF控件绑定到后面的代码?
<Window x:Class="WpfBindToCodeBehind.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300"
Loaded="Window_Loaded">
<StackPanel Orientation="Vertical">
<Button Name="ToggleExpand" Click="ToggleExpand_Click">Toggle Expander</Button>
<Expander Name="Expander"
Header="Don't click me, click the button!"
IsExpanded="{Binding RelativeSource={RelativeSource Self},Path=MayExpand}">
<TextBlock Text="{Binding}"/>
</Expander>
</StackPanel>
</Window>
这是后面的代码:
public partial class Window1 : Window,INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public Window1()
{
InitializeComponent();
}
private void ToggleExpand_Click(object sender, RoutedEventArgs e)
{
MayExpand = !mayExpand;
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
Expander.DataContext = "Show me";
}
private bool mayExpand;
public bool MayExpand
{
get { return mayExpand; }
set
{
mayExpand = value;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("MayExpand"));
}
}
}
为IsExpanded属性的绑定表达式是行不通的。该代码是一种简化,实际上扩展器的绑定已经通过父控件的数据内容设置。
如何将IsExpanded属性绑定到后面的代码的属性?
我可以将它绑定到后面代码中方法的结果吗?
您不能结合直接的方法,同一类或没有。您必须将方法封装为属性调用,或者使用值转换器,或者以其他方式解决该限制。 – 2009-08-20 22:17:47