随机密码生成器问题 [英] Random password generator problem

问题描述

您好。我正在尝试编写随机密码生成器，但我认为有问题。



问题是：

Hello. I am trying to code a random password generator but I assume a problem.

Problem is:

str2 = Conversions.ToString(random.Next(0, pool.Length))
            str = (str & Conversions.ToString(pool(Conversions.ToInteger(str2))))

我尝试过：

What I have tried:

Dim num As Integer = 0
        Me.TextBox1.Text = ""
        Dim str As String = ""
        Dim random As New Random
        Dim str2 As String = ""
        Do While (num < 3)
            str2 = Conversions.ToString(random.Next(0, pool.Length))
            str = (str & Conversions.ToString(pool(Conversions.ToInteger(str2))))
            num += 1
        Loop
        Me.TextBox1.Text = ("1618ML00" & str & "8")

推荐答案

你可能会想要真正描述问题。只是发布一行代码作为问题并没有真正说明你认为问题是什么。



此外，这行代码本身是一个问题，因为它的编写非常糟糕，以及它所使用的整个方法。



看起来你正在尝试使用随机索引生成随机密码到一个字符数组中，正确吗？



方法应该完成一件事。在这种情况下，生成由随机字符组成的字符串。它不应该对文本框或预先发布/附加任何字符而不是它所挑选的字符串。

You might want to actually describe the problem. Just posting a line of code as the problem doesn't really say anything about what you think the problem is.

Also, that line of code itself IS a problem because it's so badly written, along with the entire method it's in.

It looks like you're trying to generate a random password using random indexes into an array of characters, correct?

A method should do exactly ONE thing. In this case, generate a string made up of random characters. It should NOT do anything with a textbox or preprend/append any characters other than the ones it's picking to the string.

'  Assume "pool" is an array of characters accessible by this method.
Public Function GeneratePasswordString(length As Integer) As String
    If length < 0 Then
        Throw New ArgumentException
    End If

    Dim RNG As New Random
    Dim buffer As New StringBuilder
    Dim index As Integer

    For count As Integer = 1 to length
        index = RNG.Next(0, pool.length)
        buffer.Append(pool(index))
    Next

    Return buffer.ToString
End Function

这篇关于随机密码生成器问题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！