ICommand 类型的 WPF 附加属性

Question

I want to implement a new Attached Property for buttons which registers if the mouse is over and executes a Command if so. This is the C# code:

 public class MouseMovement { public static readonly DependencyProperty MouseOverCommandProperty = DependencyProperty.RegisterAttached("MouseOverCommand", typeof(ICommand), typeof(MouseMovement), new FrameworkPropertyMetadata(new PropertyChangedCallback(MouseOverCommandChanged))); private static void MouseOverCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { FrameworkElement element = (FrameworkElement)d; element.MouseEnter += new MouseEventHandler(element_MouseOver); } private static void element_MouseOver(object sender, MouseEventArgs e) { FrameworkElement element = (FrameworkElement)sender; ICommand cmd = GetMouseOverCommand(element); cmd.Execute(e); } public static void SetMouseOverCommand(UIElement element, ICommand value) { element.SetValue(MouseOverCommandProperty, value); } private static ICommand GetMouseOverCommand(FrameworkElement element) { return (ICommand)element.GetValue(MouseOverCommandProperty); } }

And the xaml:

 <Button mouseEvents:MouseMovement.MouseOverCommand="{Binding ButtonMouseOverCommand}" Grid.Row="0" Background="Transparent" BorderThickness="0" > <StackPanel> <Image /> <TextBlock Text="BL-Invoices" Foreground="White"/> </StackPanel> </Button>

Everytime I try to run this I get the error: "Binding can not be specified for the property "SetMouseOverCommand" of type button. Binding can only be specified for a DependencyProperty of a DependencyObject"

I got a little bit stuck at this point, maybe you have some ideas.

Edit: As stated in the accepted answer the mistake was a typo. The AttachedProperty name was set to "MouveOverCommand" instead of "MouseOverCommand". I edited the code snippet to be correct.

Answer 1

It looks like it's just a typo, I put your code into a sample project and it worked as expected.

public static readonly DependencyProperty MouseOverCommandProperty =
        DependencyProperty.RegisterAttached("MouseOverCommand", typeof(ICommand), typeof(MouseMovement), 
            new FrameworkPropertyMetadata(new PropertyChangedCallback(MouseOverCommandChanged)));