KeyBinding Label

本文关键字：Label KeyBinding | 更新日期: 2023-09-27 18:24:16

我有一个TreeView，其定义如下：

<TreeView ItemsSource="{Binding Folders, UpdateSourceTrigger=PropertyChanged}" x:Name="tree">
    <TreeView.ItemTemplate>
        <HierarchicalDataTemplate ItemsSource="{Binding Folders, UpdateSourceTrigger=PropertyChanged}">
            <Label Content="{Binding Name}" >
                <Label.InputBindings>
                    <KeyBinding Key="Delete"
                                Command="{Binding DataContext.DeleteFolderCommand, RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}}"/>
                    <MouseBinding MouseAction="LeftDoubleClick"
                                  Command="{Binding DataContext.SelectFolderCommand, RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}}"
                                  CommandParameter="{Binding ElementName=tree, Path=SelectedItem}" />
                </Label.InputBindings>
            </Label>
        </HierarchicalDataTemplate>
    </TreeView.ItemTemplate>
</TreeView>

此视图与它的代码隐藏文件绑定：

DataContext="{Binding RelativeSource={RelativeSource Self}}"

LeftDoubleClick的InputBinding运行良好。

但是"Delete"键的InputBinding不起作用。

KeyBinding绑定到的Command看起来像：

public ICommand DeleteFolderCommand
{
    get { return _deleteFolderCommand; }
    set
    {
        _deleteFolderCommand = value;
        OnPropertyChanged();
    }
}

在构造函数中，我定义：

DeleteFolderCommand = new RelayCommand(DeleteFolder);

DeleteFolder方法看起来就像：

private void DeleteFolder(object parameter)
{
  // Break-Point here will not be reached                
}

我做错了什么？

我已经检查了"输出窗口"中的绑定错误，但没有。

KeyBinding Label

我通过直接在TreeView 处理KeyBinding来管理它

<TreeView ItemsSource="{Binding Folders, UpdateSourceTrigger=PropertyChanged}" x:Name="tree">
    <TreeView.InputBindings>
        <KeyBinding Key="Delete" Command="{Binding DataContext.DeleteFolderCommand, RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}}"/>
    </TreeView.InputBindings>
    <TreeView.ItemTemplate>
        <HierarchicalDataTemplate ItemsSource="{Binding Folders, UpdateSourceTrigger=PropertyChanged}">
            <Label Content="{Binding Name}">
                <Label.InputBindings>
                    <MouseBinding MouseAction="LeftDoubleClick"
                                Command="{Binding DataContext.SelectFolderCommand, RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}}"
                                CommandParameter="{Binding ElementName=tree, Path=SelectedItem}" />
                </Label.InputBindings>
            </Label>
        </HierarchicalDataTemplate>
    </TreeView.ItemTemplate>
</TreeView>
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