在C#中,子窗口间的通信可以通过多种方式实现
首先,在子窗口(ChildWindow)中定义一个事件(Event)和委托(Delegate)。然后,在主窗口(MainWindow)中注册这个事件。当子窗口需要与主窗口通信时,触发这个事件。主窗口接收到事件后,可以执行相应的操作。
示例代码:
ChildWindow.cs:
public partial class ChildWindow : Window
{
public delegate void MessageEventHandler(object sender, MessageEventArgs e);
public event MessageEventHandler MessageReceived;
public ChildWindow()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
string message = "Hello from ChildWindow!";
MessageReceived?.Invoke(this, new MessageEventArgs(message));
}
}
public class MessageEventArgs : EventArgs
{
public string Message { get; set; }
public MessageEventArgs(string message)
{
Message = message;
}
}
MainWindow.xaml.cs:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void OpenChildWindow_Click(object sender, RoutedEventArgs e)
{
ChildWindow childWindow = new ChildWindow();
childWindow.MessageReceived += ChildWindow_MessageReceived;
childWindow.Show();
}
private void ChildWindow_MessageReceived(object sender, MessageEventArgs e)
{
MessageBox.Show($"Message from ChildWindow: {e.Message}");
}
}
在MVVM模式中,我们可以使用消息传递库(如MvvmLight的Messenger类)来实现子窗口间的通信。首先,在子窗口的ViewModel中发送消息。然后,在主窗口的ViewModel中注册接收消息。
安装MvvmLight库:
Install-Package MvvmLightLibs
ChildViewModel.cs:
public class ChildViewModel : ViewModelBase
{
public RelayCommand SendMessageCommand { get; private set; }
public ChildViewModel()
{
SendMessageCommand = new RelayCommand(SendMessage);
}
private void SendMessage()
{
Messenger.Default.Send<string>("Hello from ChildWindow!");
}
}
MainViewModel.cs:
public class MainViewModel : ViewModelBase
{
public MainViewModel()
{
Messenger.Default.Register<string>(this, message =>
{
MessageBox.Show($"Message from ChildWindow: {message}");
});
}
}
这两种方法都可以实现子窗口间的通信。你可以根据项目需求和个人喜好选择合适的方法。