我是一名有用的助手,可以将文本翻译成中文。以下是需要翻译的内容:
在我的视图模型中:
所有的OnAttached、AssociatedObject_Loaded和LoadedCommand都被触发了,但是LoadedCommand设置没有被触发,显然WindowLoadedCommand也没有被触发。你有什么线索可以让这个工作起来吗?
我在Windows 2012中有一个WPF项目,在其中我需要在窗口加载事件中加载一些信息。不过,我需要在View Model而不是在CodeBehind中完成这个操作。我试图使用以下代码:
在我的xaml中:
<interactivity:Interaction.Behaviors>
<behaviors:WindowLoadedBehavior LoadedCommand="{Binding WindowLoadedCommand}" />
</interactivity:Interaction.Behaviors>
在我的视图模型中:
private DelegateCommand _WindowLoadedCommand;
public DelegateCommand WindowLoadedCommand
{
get
{
return _WindowLoadedCommand;
}
private set
{
_WindowLoadedCommand = value;
}
}
public ShellViewModel()
{
WindowLoadedCommand = new DelegateCommand(WindowLoadedAction);
}
protected void WindowLoadedAction()
{
...
}
我的附加行为:
public class WindowLoadedBehavior : Behavior<FrameworkElement>
{
[SuppressMessage("Microsoft.StyleCop.CSharp.MaintainabilityRules", "SA1401:FieldsMustBePrivate", Justification = "Dependency Property. Allow public.")]
public static DependencyProperty LoadedCommandProperty = DependencyProperty.Register("LoadedCommand", typeof(ICommand), typeof(WindowLoadedBehavior), new PropertyMetadata(null));
public ICommand LoadedCommand
{
get { return (ICommand)GetValue(LoadedCommandProperty); }
set { SetValue(LoadedCommandProperty, value); }
}
protected override void OnAttached()
{
base.OnAttached();
AssociatedObject.Loaded += AssociatedObject_Loaded;
}
protected override void OnDetaching()
{
AssociatedObject.Loaded -= AssociatedObject_Loaded;
base.OnDetaching();
}
private void AssociatedObject_Loaded(object sender, RoutedEventArgs e)
{
if (LoadedCommand != null)
LoadedCommand.Execute(null);
}
}
所有的OnAttached、AssociatedObject_Loaded和LoadedCommand都被触发了,但是LoadedCommand设置没有被触发,显然WindowLoadedCommand也没有被触发。你有什么线索可以让这个工作起来吗?