WPF：添加命令以通过绑定菜单项自动生成
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原文地址: http://stackoverflow.com/questions/14098810/
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WPF: Add a command to auto-generated by binding menu items
提问by trickbz
MVVM is used. I created separate menu 'Recent files' which gets its items from binding. It looks like that:
使用 MVVM。我创建了单独的菜单“最近的文件”，它从绑定中获取项目。它看起来像这样：
<MenuItem Header="_Recent files" ItemsSource="{Binding RecentFiles, Converter={StaticResource RecentFilesToListOfStringsConverter}, Mode=OneWay}" >
</MenuItem>
Now, I would like to add Command to each of the those auto-generated items, which should get the path as command parameter and execute import file action by click.
现在，我想将 Command 添加到每个自动生成的项目中，这些项目应该获取路径作为命令参数并通过单击执行导入文件操作。
Could you please suggest how can it be done in MVVM way?
您能否建议如何以 MVVM 方式完成？
回答by trickbz
Again, found the solution by myself. I tried to put the command in wrong way like below, and it doesn't work:
再次，自己找到了解决方案。我试图以错误的方式放置命令，如下所示，但它不起作用：
<MenuItem Header="_Recent files" ItemsSource="{Binding RecentFiles, Converter={StaticResource RecentFilesToListOfStringsConverter}, Mode=OneWay}" >
<MenuItem.ItemContainerStyle>
<Style TargetType="{x:Type MenuItem}">
<Setter Property="Command" Value="{Binding ImportRecentItemCommand}" />
</Style>
</MenuItem.ItemContainerStyle>
</MenuItem>
Here is the right approach. Still don't understand how it works, have to learn WPF deeply!
这是正确的方法。还是不明白怎么操作，还得深入学习WPF！
<MenuItem Header="_Recent files" ItemsSource="{Binding RecentFiles, Converter={StaticResource RecentFilesToListOfStringsConverter}, Mode=OneWay}" >
<MenuItem.ItemContainerStyle>
<Style TargetType="{x:Type MenuItem}">
<Setter Property="Command" Value="{Binding DataContext.ImportRecentItemCommand, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type MenuItem}, AncestorLevel=1}}" />
</Style>
</MenuItem.ItemContainerStyle>
</MenuItem>
EDIT: The final version
编辑：最终版本
XAML:
XAML：
<MenuItem Header="_Recent files" ItemsSource="{Binding RecentFiles, Converter={StaticResource RecentFilesToListOfStringsConverter}, Mode=OneWay}" >
<MenuItem.ItemContainerStyle>
<Style TargetType="{x:Type MenuItem}">
<Setter Property="Command" Value="{Binding DataContext.ImportRecentItemCommand, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type MenuItem}, AncestorLevel=1}}" />
<Setter Property="CommandParameter" Value="{Binding}" />
</Style>
</MenuItem.ItemContainerStyle>
</MenuItem>
ViewModel: MVVM Light Toolkit is used, RelayCommand goes from there:
ViewModel：使用了 MVVM Light Toolkit，RelayCommand 从那里开始：
private ICommand _importRecentItemCommand;
public ICommand ImportRecentItemCommand
{
get { return _importRecentItemCommand ?? (_importRecentItemCommand = new RelayCommand<object>(ImportRecentItemCommandExecuted)); }
}
private void ImportRecentItemCommandExecuted(object parameter)
{
MessageBox.Show(parameter.ToString());
}
Enjoy
享受
