CentralizedControl/HandyControl/HandyControl_Shared/Controls/Attach/PasswordBoxAttach.cs

using System.Windows;
using HandyControl.Data;

namespace HandyControl.Controls;

public class PasswordBoxAttach
{
    /// <summary>
    ///     密码长度
    /// </summary>
    public static readonly DependencyProperty PasswordLengthProperty = DependencyProperty.RegisterAttached(
        "PasswordLength", typeof(int), typeof(PasswordBoxAttach), new PropertyMetadata(ValueBoxes.Int0Box));

    public static void SetPasswordLength(DependencyObject element, int value) => element.SetValue(PasswordLengthProperty, value);

    public static int GetPasswordLength(DependencyObject element) => (int) element.GetValue(PasswordLengthProperty);

    /// <summary>
    ///     是否监测
    /// </summary>
    public static readonly DependencyProperty IsMonitoringProperty = DependencyProperty.RegisterAttached(
        "IsMonitoring", typeof(bool), typeof(PasswordBoxAttach), new FrameworkPropertyMetadata(ValueBoxes.FalseBox, FrameworkPropertyMetadataOptions.Inherits, OnIsMonitoringChanged));

    private static void OnIsMonitoringChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        if (d is System.Windows.Controls.PasswordBox passwordBox)
        {
            if (e.NewValue is bool boolValue)
            {
                if (boolValue)
                {
                    passwordBox.PasswordChanged += PasswordChanged;
                }
                else
                {
                    passwordBox.PasswordChanged -= PasswordChanged;
                }
            }
        }
    }

    public static void SetIsMonitoring(DependencyObject element, bool value) => element.SetValue(IsMonitoringProperty, ValueBoxes.BooleanBox(value));

    public static bool GetIsMonitoring(DependencyObject element) => (bool) element.GetValue(IsMonitoringProperty);

    private static void PasswordChanged(object sender, RoutedEventArgs e)
    {
        if (sender is System.Windows.Controls.PasswordBox passwordBox)
        {
            SetPasswordLength(passwordBox, passwordBox.Password.Length);
        }
    }
}