WPF 应用程序命令绑定不起作用
你好 我在 WPF 中的 CommandBindings 方面遇到了一个奇怪的问题。 我在对象的构造函数中添加 CommandBindings。命令绑定看起来像
CommandBindings.Add(new CommandBinding(ApplicationCommands.Copy,Copy_Executed,Copy_Enabled));
CommandBindings.Add(new CommandBinding(ApplicationCommands.Cut,Cut_Executed,Cut_Enabled));
CommandBindings.Add(new CommandBinding(ApplicationCommands.Paste,Paste_Executed,Paste_Enabled));
负责执行的相应函数看起来像这样
private void Paste_Enabled(object sender,CanExecuteRoutedEventArgs e)
{
e.CanExecute = selectionService != null && selectionService.CurrentSelection.Count > 0;
}
private void Paste_Executed(object sender, ExecutedRoutedEventArgs e)
{
if (GetSelected() != null)
Paste(true);
else
Paste(false);
}
private void Copy_Executed(object sender, ExecutedRoutedEventArgs e)
{
Copy();
}
private void Copy_Enabled(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = selectionService.CurrentSelection.OfType<DesignerItem>().Count() > 0;
}
#endregion
private void Cut_Executed(object sender, ExecutedRoutedEventArgs e)
{
Copy();
DeleteCurrentSelection(false);
}
private void Cut_Enabled(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = this.SelectionService.CurrentSelection.Count() > 0;
}
问题是只有 cut 命令有效。我的意思是，如果我在任何其他功能（复制或粘贴）中设置断点，则不会命中断点。有人可以告诉我我做错了什么吗？
Hi
I have a strange problem with CommandBindings in WPF.
I add CommandBindings in constructor of object. The command bindings looks like that
CommandBindings.Add(new CommandBinding(ApplicationCommands.Copy,Copy_Executed,Copy_Enabled));
CommandBindings.Add(new CommandBinding(ApplicationCommands.Cut,Cut_Executed,Cut_Enabled));
CommandBindings.Add(new CommandBinding(ApplicationCommands.Paste,Paste_Executed,Paste_Enabled));
Coresponding functions which are responsible for execution look that way
private void Paste_Enabled(object sender,CanExecuteRoutedEventArgs e)
{
e.CanExecute = selectionService != null && selectionService.CurrentSelection.Count > 0;
}
private void Paste_Executed(object sender, ExecutedRoutedEventArgs e)
{
if (GetSelected() != null)
Paste(true);
else
Paste(false);
}
private void Copy_Executed(object sender, ExecutedRoutedEventArgs e)
{
Copy();
}
private void Copy_Enabled(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = selectionService.CurrentSelection.OfType<DesignerItem>().Count() > 0;
}
#endregion
private void Cut_Executed(object sender, ExecutedRoutedEventArgs e)
{
Copy();
DeleteCurrentSelection(false);
}
private void Cut_Enabled(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = this.SelectionService.CurrentSelection.Count() > 0;
}
The problem is that only cut command works. I mean if I set a breakpoint in any other funciotn (copy or paste) the breakpoint are not hit. Could somebody tell me what I do wrong ??
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
Copy和Paste命令是否绑定到应用程序窗口中的任何控件？看起来UI只查找Cut命令，而不查找其他两个命令。确保将其他两个命令绑定到UI上。Are
CopyandPastecommands bound to any control in your application window? Looks like theUIonly looks forCutcommand and not other two commands. Make sure you bound other two commands to theUIwell.您还需要添加 KeyGestures
You need to add KeyGestures also