[英]Handle Routed Events in WPF user control loaded from a dll at runtime
我有一個WPF控件庫,我從主應用程序成功加載其程序集並顯示我想要的用戶控件。 問題是我想為usercontrol處理鍵盤路由事件,但似乎消息永遠不會到達它。 忠告?:
我的場景主應用程序窗口xaml:
<Window x:Class="Apollo.Clock.UI.ClockWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
ResizeMode="NoResize" WindowState="Maximized">
<Grid>
<StackPanel x:Name="MainContainer"></StackPanel>
</Grid>
</Window>
從主應用程序窗口加載用戶控件:
UserControl myControl = null;
Assembly asm = Assembly.LoadFrom("AppUI.WPF.dll");
Type[] tlist = asm.GetTypes();
foreach (Type t in tlist){
if (t.FullName == "DefaultSkin"){
myControl = Activator.CreateInstance(t) as UserControl;
MainContainer.Children.Add(myControl);
break;
}
}
DefaultSkin xaml:
<UserControl x:Class="DefaultSkin"
Keyboard.PreviewKeyDown="Window_PreviewKeyDown">
DefaultSkin.cs
private void Window_PreviewKeyDown(object sender, KeyEventArgs e)
{
e.Handled = true;
//more code
}
只有在按下usercontrol中的某個鍵時,它才會處理該事件。
要設置焦點,您可以使用以下內容:
激活用戶控件后,IsVisibleChanged:
myControl.IsVisibleChanged += SetKeyboardFocus;
並有SetKeyboardFocus方法:
void SetKeyboardFocus(object sender, DependencyPropertyChangedEventArgs e)
{
IInputElement inputElement = sender as IInputElement;
inputElement.Focusable = true;
Keyboard.Focus(inputElement);
}
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