Question

我无法获得使用转换器的自定义绑定，在构建项目时获取此信息：

错误2解析标记扩展时遇到类型'MS.Internal.Markup.MarkupExtensionParser + UnknownMarkupExtension'的未知属性'Converter'。

错误指向此代码：

<KeyBinding 
        Key="{helper:KeyboardShortcut InsertTargetToSource, Converter={StaticResource KeyGestureConverterKey},ConverterParameter=Key}" 
        Modifiers="{helper:KeyboardShortcut InsertTargetToSource, Converter={StaticResource KeyGestureConverterKey},ConverterParameter=Modifiers}" 
        Command="{Binding CopyToTargetCommand}"/>

KeyboardShortCut是来自设置文件的绑定：

public class KeyboardShortcutExtension : Binding
{
    public KeyboardShortcutExtension()
    {
        Initialize();
    }

    public KeyboardShortcutExtension(string path)
        : base(path)
    {
        Initialize();
    }

    private void Initialize()
    {
        this.Source = TI.Shortcuts.Default;
        this.Mode = BindingMode.TwoWay;
    }

}

转换器从字符串（如“Ctrl + Shift + X”）转换为Key和Modifiers：

private KeyGestureConverter mConverter = new KeyGestureConverter();

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        var text = value.ToString();
        var gesture = mConverter.ConvertFromInvariantString(text) as KeyGesture;
        if (parameter == "Key")
        {
            return gesture.Key;
        }
        if (parameter == "Modifiers")
        {
            return gesture.Modifiers;
        }
        return gesture;
    }

我有什么遗失的吗？或者，在尝试从设置文件中的字符串绑定到KeyBinding时，我应该采用不同的方法吗？

编辑：

使用以下代码，一切正常，但代码不可读。有没有办法自动生成这个，所以在我的标记中我会写例如只是

<MyKeyBinding Value="CopyToTargetCommand"/>

它会产生其余的吗？

<KeyBinding Command="{Binding CopyToTargetCommand}">
        <KeyBinding.Key>
            <helper:KeyboardShortcut Path="InsertTargetToSource" ConverterParameter="Key">
                <helper:KeyboardShortcut.Converter>
                    <StaticResource ResourceKey="KeyGestureConverterKey"/>
                </helper:KeyboardShortcut.Converter>
            </helper:KeyboardShortcut>
        </KeyBinding.Key>
        <KeyBinding.Modifiers>
            <helper:KeyboardShortcut Path="InsertTargetToSource" ConverterParameter="Modifiers">
                <helper:KeyboardShortcut.Converter>
                    <StaticResource ResourceKey="KeyGestureConverterKey"/>
                </helper:KeyboardShortcut.Converter>
            </helper:KeyboardShortcut>
        </KeyBinding.Modifiers>
    </KeyBinding>

Answer 1

class CustomizableKeyBinding : KeyBinding
{
    public CustomizableKeyBinding()
        : base()
    {
    }

    StringToKeyGestureConverter converter = new StringToKeyGestureConverter();

    public string Description
    {
        set
        {
            InitBindings(value);
        }
    }

    private void InitBindings(string value)
    {
        BindingOperations.SetBinding(this, KeyBinding.KeyProperty, new KeyboardShortcutExtension(value) { Converter = converter, ConverterParameter = "Key" });
        BindingOperations.SetBinding(this, KeyBinding.ModifiersProperty, new KeyboardShortcutExtension(value) { Converter = converter, ConverterParameter = "Modifiers" });
    }
}

然后在XAML中：

 <helper:CustomizableKeyBinding Command="{Binding CopyToTargetCommand}" Description="..."/>

我的自定义绑定中的类型...的未知属性“转换器”

1 个答案: