WPF passwordbox如何禁止复制粘贴，不使用自定义控件的情况下

如果你不想使用自定义控件，你仍然可以在WPF中禁止PasswordBox控件的复制和粘贴操作。以下是一种方法： 1. 使用Attached Property（附加属性）来控制PasswordBox的行为。 ```csharp public static class PasswordBoxHelper public static readonly DependencyProperty IsCopyPasteEnabledProperty = DependencyProperty.RegisterAttached("IsCopyPasteEnabled", typeof(bool), typeof(PasswordBoxHelper), new PropertyMetadata(true, OnIsCopyPasteEnabledC[han](https://geek.csdn.net/educolumn/0d22b54eaf6bcf967d9625e1679d00b4?spm=1055.2569.3001.10083)ged)); public static bool GetIsCopyPasteEnabled(DependencyObject obj) return (bool)obj.GetValue(IsCopyPasteEnabledProperty); public static void SetIsCopyPasteEnabled(DependencyObject obj, bool value) obj.SetValue(IsCopyPasteEnabledProperty, value); private static void OnIsCopyPasteEnabledC[han](https://geek.csdn.net/educolumn/0d22b54eaf6bcf967d9625e1679d00b4?spm=1055.2569.3001.10083)ged(DependencyObject d, DependencyPropertyC[han](https://geek.csdn.net/educolumn/0d22b54eaf6bcf967d9625e1679d00b4?spm=1055.2569.3001.10083)gedEventArgs e) if (d is PasswordBox passwordBox) if ((bool)e.NewValue) passwordBox.PreviewKeyDown += PasswordBox_PreviewKeyDown; DataObject.AddPasting[han](https://geek.csdn.net/educolumn/0d22b54eaf6bcf967d9625e1679d00b4?spm=1055.2569.3001.10083)dler(passwordBox, PasswordBox_Pasting); passwordBox.PreviewKeyDown -= PasswordBox_PreviewKeyDown; DataObject.RemovePasting[han](https://geek.csdn.net/educolumn/0d22b54eaf6bcf967d9625e1679d00b4?spm=1055.2569.3001.10083)dler(passwordBox, PasswordBox_Pasting); private static void PasswordBox_PreviewKeyDown(object sender, KeyEventArgs e) if ((e.Key == Key.V || e.Key == Key.C || e.Key == Key.X) && (Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control) e.Handled = true; private static void PasswordBox_Pasting(object sender, DataObjectPastingEventArgs e) e.CancelCommand(); ```