绑定到 MVVM WPF 中的窗口关闭事件？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/24260989/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Binding to Window close event in MVVM WPF?
提问by Hardgraf
I am trying to capture the close event on my view to invoke a save method. I don't want the user to be able to close the window and dispose of un-saved changes. I have tried to use
我试图在我的视图上捕获关闭事件以调用保存方法。我不希望用户能够关闭窗口并处理未保存的更改。我试过用
Application.Current.MainWindow.Close()
But the view In question is not my MainWindow. Is there any way to bind the close window to a command from Xaml along the lines of:
但有问题的观点不是我的MainWindow. 有什么方法可以将关闭窗口绑定到 Xaml 中的命令：
public RelayCommand CloseWindow;
Constructor()
{
CloseWindow = new RelayCommand(CloseWin);
}
public void CloseWin(object obj)
{
Window win = obj as Window;
win.Close();
}
& the Xaml:
＆Xaml：
<Button Command="{Binding CloseWindowCommand}" CommandParameter="{Binding ElementName=WindowNameTobeClose}" Content="Cancel" />
But capturing the window close event rather than bound to a defined button in the UI?
但是捕获窗口关闭事件而不是绑定到 UI 中定义的按钮？
回答by Hardgraf
Here's my solution. Namespace in Xaml:
这是我的解决方案。Xaml 中的命名空间：
xmlns:z="http://schemas.microsoft.com/expression/2010/interactivity"
Xaml binding:
Xaml 绑定：
<z:Interaction.Triggers>
<z:EventTrigger EventName="Closing">
<i:InvokeCommandAction Command="{Binding CloseWindowCommand}" />
</z:EventTrigger>
</z:Interaction.Triggers>
I already had a commands helper class in the project. Here's the exposed property in my viewModel:
我已经在项目中有一个命令助手类。这是我的 viewModel 中的公开属性：
private ICommand _CloseArticleCommand;
public ICommand CloseArticleCommand
{
get { return _CloseArticleCommand; }
set
{
_CloseArticleCommand = value;
OnPropertyChanged("CloseArticleCommand");
}
}
The property is initialized in a viewModel constructor method:
该属性在 viewModel 构造函数方法中初始化：
private void InitialiseBtnCommands()
{
CloseWindowCommand = new BtnCommand(CloseWindowCommandAction);
}
And finally the action method which performs the save:
最后是执行保存的操作方法：
private void CloseWindowCommandAction()
{
//Save your data etc.
}
