我怎样才能跨preT在我登录系统掩蔽系统？ [英] How can I interpret a masking system in my login system?

问题描述

我只是不知道我怎么可以通过添加阵列的面具。我也想掩蔽系统识别退格不是一个字母。

I'm just not sure how I can mask with the addition of arrays. I would also like the masking system to recognize backspace not as a letter.

Module Module1

Sub Main()

    Dim memofs As Char
    Dim stdntpassword As String = Nothing
    Dim staffpassword As String = Nothing
    Console.Write("Are you a member of staff? (y/n) ")
    memofs = Console.ReadLine
    If memofs = "y" Or memofs = "Y" Then

    ElseIf memofs = "n" Or memofs = "N" Then
        Console.WriteLine("Password: ")
        stdntpassword = Console.ReadLine
    End If

    For attempts As Integer = 1 To 5

        Console.WriteLine()
        Console.WriteLine("Attempt Number " & attempts)
        Console.WriteLine()
        Console.Write("Password: ")
        staffpassword = Console.ReadLine
        Dim fullline As String = ""
        FileOpen(1, _
          "E:\Computing\Spelling Bee\StaffPasswords\staffpassword.csv", OpenMode.Input)
        fullline = LineInput(1)
        Dim item() As String = Split(fullline, ",")
        If staffpassword = item(0) Then
            Console.Clear()
            staffmenu()
        Else : FileClose(1)
        End If
        Console.Clear()

鸭preciated，

Appreciated,

推荐答案

我曾经这样做过，但不是掩蔽密码，说一个星号，我刚刚离开它留空（如进入Linux的密码） 。后者是pretty简单：

I've done this once before, but instead of masking the password with, say an asterisk, I just left it blank (like entering a password in Linux). The latter is pretty straightforward:

Dim keyInfo as ConsoleKeyInfo = Console.ReadKey(True)
Dim enteredPassword as String = ""
' Read each entered character until user presses Enter.
While keyInfo.Key <> ConsoleKey.Enter
   If keyInfo.Key = ConsoleKey.Backspace AndAlso enteredPassword.Length > 0 Then
       enteredPassword = enteredPassword.Substring(0, enteredPassword.Length - 1)
   Else
       password &= keyInfo.KeyChar
   End If
   ' Read next entered character
   keyInfo = Console.ReadKey(True)
End While

要掩盖实际的密码输入，使用相同的想法，但输入和分析后的每个字符，添加一个 Console.Write（*C）。这GET是一个有点棘手与退格，我知道的唯一办法模拟它会做的：

To actually mask the password input, use the same idea, but after each character is entered and parsed, add a Console.Write("*"c). This get's a bit tricky with backspace, and the only way I know to simulate it would be to do:

Console.Write(ControlChars.Back)' move cursor back one column
Console.Write(" "c) ' clear the asterisk
Console.Write(ControlChars.Back)' move cursor back again to allow writing.

这是在C＃中位prettier在我看来，（和作品使用'\\ B'而不是 ControlChars.Back ），因此您的结果可能会有所不同。

It's a bit prettier in C# in my opinion (and works using '\b' instead of ControlChars.Back) so your results may vary.

此外，如果有这样做一个简单的方法，我的爱的知道，因为这似乎是重新发明轮子一个相当简单的任务。

Also if there's an easier way to do this, I'd love to know, as this seems like reinventing the wheel for a fairly simple task.

这篇关于我怎样才能跨preT在我登录系统掩蔽系统？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！