WPF PasswordChanged 属性未检测到退格删除

Question

我在密码框中使用 passwordchanged 属性：

 PasswordChanged="NewPWBox_PasswordChanged"

用于检测密码的“实时”更改并更新我的其他控件，以显示密码的复杂程度。 它工作得很好。

唯一的问题是当我标记整个文本并用退格键删除它时，它不会检测到字符串的变化，而我的其他控件不会更新。

我真的不是前端人员，无法在任何地方找到解决此问题的方法。

显示密码复杂度的功能：

private void NewPWBox_PasswordChanged(object sender, RoutedEventArgs e)
    {

        string NewPass = NewPWBox.Password;

        PasswordScore passwordStrengthScore = PasswordAdvisor.CheckStrength(NewPass);

        switch (passwordStrengthScore)
        {
            case PasswordScore.VeryWeak:

                if(passwordStrengthScore == PasswordScore.VeryWeak)
                {
                    VW_Grid.Visibility = Visibility.Visible;
                    VW_Label.Visibility = Visibility.Visible;
                }

                //hide others
                Weak_Grid.Visibility = Visibility.Hidden;
                Weak_Label.Visibility = Visibility.Hidden;
                Medium_Grid.Visibility = Visibility.Hidden;
                Medium_Label.Visibility = Visibility.Hidden;
                Strong_Grid.Visibility = Visibility.Hidden;
                Strong_Label.Visibility = Visibility.Hidden;
                VS_Grid.Visibility = Visibility.Hidden;
                VS_Label.Visibility = Visibility.Hidden;

                break;
            case PasswordScore.Weak:

                if(passwordStrengthScore == PasswordScore.Weak)
                {
                    VW_Grid.Visibility = Visibility.Visible;
                    VW_Label.Visibility = Visibility.Visible;
                    Weak_Grid.Visibility = Visibility.Visible;
                    Weak_Label.Visibility = Visibility.Visible;
                }

                //hide others
                Medium_Grid.Visibility = Visibility.Hidden;
                Medium_Label.Visibility = Visibility.Hidden;
                Strong_Grid.Visibility = Visibility.Hidden;
                Strong_Label.Visibility = Visibility.Hidden;
                VS_Grid.Visibility = Visibility.Hidden;
                VS_Label.Visibility = Visibility.Hidden;

                break;
            case PasswordScore.Medium:

                if(passwordStrengthScore == PasswordScore.Medium)
                {
                    VW_Grid.Visibility = Visibility.Visible;
                    VW_Label.Visibility = Visibility.Visible;
                    Weak_Grid.Visibility = Visibility.Visible;
                    Weak_Label.Visibility = Visibility.Visible;
                    Medium_Grid.Visibility = Visibility.Visible;
                    Medium_Label.Visibility = Visibility.Visible;
                }

                //hide others
                Strong_Grid.Visibility = Visibility.Hidden;
                Strong_Label.Visibility = Visibility.Hidden;
                VS_Grid.Visibility = Visibility.Hidden;
                VS_Label.Visibility = Visibility.Hidden;

                break;
            case PasswordScore.Strong:

                if(passwordStrengthScore == PasswordScore.Strong)
                {
                    VW_Grid.Visibility = Visibility.Visible;
                    VW_Label.Visibility = Visibility.Visible;
                    Weak_Grid.Visibility = Visibility.Visible;
                    Weak_Label.Visibility = Visibility.Visible;
                    Medium_Grid.Visibility = Visibility.Visible;
                    Medium_Label.Visibility = Visibility.Visible;
                    Strong_Grid.Visibility = Visibility.Visible;
                    Strong_Label.Visibility = Visibility.Visible;
                }

                //hide others
                VS_Grid.Visibility = Visibility.Hidden;
                VS_Label.Visibility = Visibility.Hidden;

                break;
            case PasswordScore.VeryStrong:

                if(passwordStrengthScore == PasswordScore.VeryStrong)
                {
                    VW_Grid.Visibility = Visibility.Visible;
                    VW_Label.Visibility = Visibility.Visible;
                    Weak_Grid.Visibility = Visibility.Visible;
                    Weak_Label.Visibility = Visibility.Visible;
                    Medium_Grid.Visibility = Visibility.Visible;
                    Medium_Label.Visibility = Visibility.Visible;
                    Strong_Grid.Visibility = Visibility.Visible;
                    Strong_Label.Visibility = Visibility.Visible;
                    VS_Grid.Visibility = Visibility.Visible;
                    VS_Label.Visibility = Visibility.Visible;
                }
                break;
        }
    }

这里是如何计算复杂性的：

    public enum PasswordScore
    {
        Blank = 0,
        VeryWeak = 1,
        Weak = 2,
        Medium = 3,
        Strong = 4,
        VeryStrong = 5
    }

    public class PasswordAdvisor
    {

        public static PasswordScore CheckStrength(string password)
        {
            int score = 1;
            if (password.Length < 1)
                return PasswordScore.Blank;
            if (password.Length < 4)
                return PasswordScore.VeryWeak;

            if (password.Length >= 8)
                score++;
            if (password.Length >= 12)
                score++;
            if (Regex.IsMatch(password, @"[0-9]+(\.[0-9][0-9]?)?", RegexOptions.ECMAScript))   //number only //"^\d+$" if you need to match more than one digit.
                score++;
            if (Regex.IsMatch(password, @"^(?=.*[a-z])(?=.*[A-Z]).+$", RegexOptions.ECMAScript)) //both, lower and upper case
                score++;
            if (Regex.IsMatch(password, @"[!,@,#,$,%,^,&,*,?,_,~,-,£,(,)]", RegexOptions.ECMAScript)) //^[A-Z]+$
                score++;
            return (PasswordScore)score;
        }

我认为你不需要它，但只是为了确定我没有错过任何东西。

各位有什么想法吗？

谢谢和最好的问候，

约翰

Answer 1

毕竟是健谈的 cmets： 在您的开关中放置一个默认情况并在这种情况下隐藏控件。

编辑：如果您将控件的数量减少到一个矩形和一个标签并更改颜色（如果需要，还可以更改大小，或渐变刷...）和标签的文本...如果密码框为空则隐藏。

它是如此简单、干净、面向未来，并且与绑定和验证更加解耦......