如何从此 Enum Switch 函数中检索结果？答案

【问题标题】：how to I retrieve my results from this Enum Switch function?如何从此 Enum Switch 函数中检索结果？
【发布时间】：2018-02-17 18:19:30
【问题描述】：

我有一个确定密码强度的基本工具（不是我的代码）。当单击button1 时，我更改了代码以从TextBox (textBox1) 检索我们正在测试的密码。但是，标签（结果）只显示弱或无的结果。小麦我在这里做错了吗？如何使标签反映在Enum 函数PasswordScore 中找到的结果？

有没有更简单的方法来确定你们使用过的密码强度？

public partial class Form7 : Form
{
    public Form7()
    {
        InitializeComponent();
    }

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

    public static PasswordScore CheckStrength(string password)
    {
        int score = 0;
        if (password.Length == 0)
            return PasswordScore.Blank;
        if (password.Length < 4)
            return PasswordScore.VeryWeak;
        if (password.Length >= 8)
            score++;
        if (password.Length >= 12)
            score++;
        if (Regex.Match(password, @"/\d+/", RegexOptions.ECMAScript).Success)
            score++;
        if (Regex.Match(password, @"/[a-z]/", RegexOptions.ECMAScript).Success &&
            Regex.Match(password, @"/[A-Z]/", RegexOptions.ECMAScript).Success)
            score++;
        if (Regex.Match(password, @"/.[!,@,#,$,%,^,&,*,?,_,~,-,£,(,)]/", RegexOptions.ECMAScript).Success)
            score++;

        return (PasswordScore)score;
    }

    public void button1_Click(object sender, EventArgs e)
    {
        String password = textBox1.Text; // Substitute with the user input string
        PasswordScore passwordStrengthScore = Form7.CheckStrength(password);
        switch (passwordStrengthScore)
        {
            case PasswordScore.Blank:
            case PasswordScore.VeryWeak:
            case PasswordScore.Weak:
                // Show an error message to the user
                break;
            case PasswordScore.Medium:
            case PasswordScore.Strong:
            case PasswordScore.VeryStrong:
                // Password deemed strong enough, allow user to be added to database etc
                break;

        if (passwordStrengthScore == PasswordScore.Blank) { Result.Text = "Blank"; }
        if (passwordStrengthScore == PasswordScore.VeryWeak) { Result.Text = "Very Weak - FAIL"; }
        if (passwordStrengthScore == PasswordScore.Weak) { Result.Text = "Weak - FAIL"; }
        if (passwordStrengthScore == PasswordScore.Medium) { Result.Text = "Medium - Compliant"; }
        if (passwordStrengthScore == PasswordScore.Strong) { Result.Text = "Strong - Compliant"; }
        if (passwordStrengthScore == PasswordScore.VeryStrong) { Result.Text = "Very Strong - Compliant"; }

        }

    }
}

【问题讨论】：

在int score = 0; 上放置一个断点，然后使用 F10 键逐行遍历函数的其余部分。在观察窗口中关注score。你会看到到底发生了什么。如果这不能解决问题，请在 button1_Click 中尝试相同的操作。
您的代码示例中没有什么可更改的结果 - 您希望它如何更改？
@NetMage 我删除了应用 passwordStrengthScore 结果的 if/then 函数，因为它根本不起作用。这就是我发帖的原因。

标签： c# winforms enums passwords

【解决方案1】：

结果总是很弱或没有，因为您的正则表达式总是失败。

请尝试修改您的正则表达式。例如：

if (Regex.Match(password, @"/\d+/", RegexOptions.ECMAScript).Success)

修改为

if (Regex.Match(password, @"\d", RegexOptions.ECMAScript).Success)

和

Regex.Match(password, @"/[a-z]/", RegexOptions.ECMAScript).Success

修改为

Regex.Match(password, @"[a-z]", RegexOptions.ECMAScript).Success

【讨论】：

这帮助我走得更远，太棒了，谢谢。

【解决方案2】：

这是工作代码。

public partial class Form7 : Form
{
    public Form7()
    {
        InitializeComponent();
    }

    public enum PasswordScore
    {
        Blank = 0,
        VeryWeak = 1,
        Weak = 2,
        Medium = 3,
        Strong = 4,
        VeryStrong = 5
    }
    public static PasswordScore CheckStrength(string password)
    {
        int score = 0;

        if (password.Length == 0)
            return PasswordScore.Blank;
        if (password.Length < 4)
            return PasswordScore.VeryWeak;

        if (password.Length >= 8)
            score++;
        if (password.Length >= 12)
            score++;
        if (Regex.Match(password, @"\d", RegexOptions.ECMAScript).Success)
            score++;
        if (Regex.Match(password, @"[a-z]", RegexOptions.ECMAScript).Success &&
          Regex.Match(password, @"/[A-Z]/", RegexOptions.ECMAScript).Success)
            score++;
        if (Regex.Match(password, @"/.[!,@,#,$,%,^,&,*,?,_,~,-,£,(,)]/", RegexOptions.ECMAScript).Success)
            score++;

        return (PasswordScore)score;
    }


    public void button1_Click(object sender, EventArgs e)
    {

        String password = textBox1.Text; // Substitute with the user input string
        PasswordScore passwordStrengthScore = Form7.CheckStrength(password);

        switch (passwordStrengthScore)
        {
            case PasswordScore.Blank:
            case PasswordScore.VeryWeak:
            case PasswordScore.Weak:
                // Show an error message to the user
                break;
            case PasswordScore.Medium:
            case PasswordScore.Strong:
            case PasswordScore.VeryStrong:
                // Password deemed strong enough, allow user to be added to database etc
                break;
        }

        if (passwordStrengthScore == PasswordScore.Blank) { Result.Text = "Blank"; }
        if (passwordStrengthScore == PasswordScore.VeryWeak) { Result.Text = "Very Weak - FAIL"; }
        if (passwordStrengthScore == PasswordScore.Weak) { Result.Text = "Weak - FAIL"; }
        if (passwordStrengthScore == PasswordScore.Medium) { Result.Text = "Medium - Compliant"; }
        if (passwordStrengthScore == PasswordScore.Strong) { Result.Text = "Strong - Compliant"; }
        if (passwordStrengthScore == PasswordScore.VeryStrong) { Result.Text = "Very Strong - Compliant"; }



    }

【讨论】：

你的模式周围仍然有 /，这对 C# 无效。