textbox:密码字符(将单词的字母一个一个改成星号) [英] textbox: password character (changing the letter of the word into asterisk one by one)

问题描述

我的登录表单中的密码文本框有问题.我希望它比其他人更精确，这就是我想知道的:

I have a problem on my password text box in log-in form. I want it to be more precise than the others, this is what i want to know:

我会在文本框中输入password"这个词，如果我输入第一个字母p"我看到它是字母p，然后如果我输入第二个字母a"，字母p"" 现在会变成 "*" 而第二个字母也可以被看作是 "a"，然后一直到 "password" 变成 "*******d".然后如果我离开那个文本框，剩下的字母也会变成*".我试图去属性并寻找密码字符，但它不符合我的需要.我该怎么做?

I will write the word "password" in the text box, if i type the first letter "p" i see that it is letter p, then if i type the second letter which is "a", the letter "p" will now become "*" while the second letter can also be seen as "a", and then it goes until the word "password" become "*******d". And then if I leave that text box the remaining letter will become "*" also. I tried to go to the properties and look for password character, but it doesn't meet my needs. How can i do that ?

推荐答案

这里我根据 Textbox 控件的 KEY_UP 和 LEAVE 事件为您创建一个简单的示例.

Here i create a simple example for you base on KEY_UP and LEAVE events of Textbox control.

使用此代码，您需要进行一些额外的工作才能使其完美，例如:

With this code you need some additional works to take it prefect like:

在 KEY_UP 上忽略不是字母数字和特殊字符的键，例如(退格、回车、Shift、回车和...)

Ignore Keys that are not Alphanumeric and special characters like (Back-space, Enter, Shift, Enter and...) On KEY_UP

测试并享受.... ;)

    private void txtxPassword_KeyUp(object sender, KeyEventArgs e)
    {
        var pass = txtxPassword.Text;
        if (pass.Length < 1)
            realPass = string.Empty;
        else
            realPass += pass[pass.Length - 1];


        if (e.KeyCode == Keys.Back)
        {
            if (realPass.Length <= 1)
                realPass = "";
            else
            {
                realPass = realPass.Substring(0, realPass.Length - 2);
            }
        }
        string result = "";
        if (realPass != string.Empty)
        {

            for (var i = 0; i < realPass.Length - 1; i++)
            {
                result += "X";
            }
            result += realPass[realPass.Length - 1];
        }

            txtxPassword.Text = result;
            txtxPassword.SelectionStart = result.Length;
            lblpass.Text = realPass;
        }

    private void txtxPassword_Leave(object sender, EventArgs e)
    {
        string result="";
        for (var i = 0; i < realPass.Length ; i++)
            {
                result += "X";
            }
        txtxPassword.Text = result;
        lblpass.Text = realPass;
    }

结果:

....................................................................................................

..........................................................................................

编辑

您必须将 RealPassword 保存在变量中.当您更改 textbox.text 时，您的 RealPassword 将被新字符丢失.所以我清除了一个名为 realPass 的变量来保留实际插入的密码.它必须是您班级中的通用变量，如下所示:

You must keep the RealPassword in a variable. When you change the textbox.text, your RealPassword will be lost by new characters. So I declear a variable named realPass to keep the actual inserted password. It must be a general variabel in your class like this:

   private string realPass="";

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