在C#中,子窗口間的通信可以通過多種方式實現(xiàn)
首先,在子窗口(ChildWindow)中定義一個事件(Event)和委托(Delegate)。然后,在主窗口(MainWindow)中注冊這個事件。當(dāng)子窗口需要與主窗口通信時,觸發(fā)這個事件。主窗口接收到事件后,可以執(zhí)行相應(yīng)的操作。
示例代碼:
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($"Message from ChildWindow: {e.Message}");
}
}
在MVVM模式中,我們可以使用消息傳遞庫(如MvvmLight的Messenger類)來實現(xiàn)子窗口間的通信。首先,在子窗口的ViewModel中發(fā)送消息。然后,在主窗口的ViewModel中注冊接收消息。
安裝MvvmLight庫:
Install-Package MvvmLightLibs
ChildViewModel.cs:
public class ChildViewModel : ViewModelBase
{
public RelayCommand SendMessageCommand { get; private set; }
public ChildViewModel()
{
SendMessageCommand = new RelayCommand(SendMessage);
}
private void SendMessage()
{
Messenger.Default.Send<string>("Hello from ChildWindow!");
}
}
MainViewModel.cs:
public class MainViewModel : ViewModelBase
{
public MainViewModel()
{
Messenger.Default.Register<string>(this, message =>
{
MessageBox.Show($"Message from ChildWindow: {message}");
});
}
}
這兩種方法都可以實現(xiàn)子窗口間的通信。你可以根據(jù)項目需求和個人喜好選擇合適的方法。