Benutzer:MovGP0/WPF/Routed Commands
aus Wikipedia, der freien Enzyklopädie
< Benutzer:MovGP0 | WPF
| MovGP0 | Über mich | Hilfen | Artikel | Weblinks | Literatur | Zitate | Notizen | Programmierung | MSCert | Physik |
|
Routed CommandsUsage<Window (...)>
<StackPanel>
<TextBox x:Name="textBox1" />
<TextBox x:Name="textBox2" />
<Button Command="ApplicationCommands.Cut" Content="Cut" />
<Button Command="ApplicationCommands.Paste" Content="Paste" />
</StackPanel>
</Window>
Using custom command implementation<Window (...)>
<Window.CommandBindings>
<CommandBinding Command="ApplicadionCommands.Cut" CanExecute="IsCutExecuteable" Executed="OnCut">
<Window.CommandBindings>
<StackPanel>
<TextBox x:Name="textBox" />
<Button Command="ApplicationCommands.Cut" Content="Cut" />
<Button Command="ApplicationCommands.Paste" Content="Paste" />
</StackPanel>
</Window>
Calling Routed Event imperativelyif(ApplicationCommands.Cut.CanExecute(param))
{
ApplicationCommands.Cut.Execute(param, textBox);
}
Custom Routed Commands
public static class MyControlCommands
{
private static RoutedCommand UpdateTextCommand { get; } = new RoutedCommand();
}
<Button Command="local:MyControlCommands.UpdateTextCommand"
CommandParameter="Hello World!"
Content="Click me" />
public MyControl()
{
CommandBindings.Add(new CommandBinding(MyControlCommands.UpdateTextCommand, OnUpdateText, CanUpdateTextExecute));
}
private void OnUpdateText(object sender, ExecutedRoutedEventArgs args)
{
// ...
)
private bool CanUpdateTextExecute(object sender, CanExecuteRoutedEventArgs e)
{
var paramater = e.Parameter;
if(parameter != null)
e.CanExecute = true;
}
|
