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

摘要：xaml <Window.DataContext> <local:HierarchicalWindowViewModel/> </Window.DataContext> <Window.Resources> <HierarchicalDataTemplate x:Key="gradetemp" Da 阅读全文

摘要：public partial class MyCombobox : ComboBox { public MyCombobox() { InitializeComponent(); } private int caretPosition; public override void OnApplyTem 阅读全文