摘要：
MainWindow.xaml（父窗体） <StackPanel> <Label Content="{Binding Message}"/> <Button Content="Input User Name" Command="{Binding OpenSubWindowCommand}"/> </ 阅读全文
摘要：
class CommandHandler : ICommand { Action action; Action<object> action1; Predicate<object> canexecute; bool withparam; bool _canexecute; public Comman 阅读全文