vb.net - 生成随机字母数字字符串

Question

我正在尝试像这样在 vb.net 中生成一个随机代码

  Dim r As New Random
        Response.Write(r.Next())

但我想生成 6 位数的代码，应该像 thie 一样是字母数字A12RV1，所有代码都应该是这样的。

我已经尝试过 vb.net 随机类，但我无法按照我的意愿进行操作。每次执行代码时，我都想获取字母数字代码。我如何在 vb.net 中实现这一点？

Answer 1

尝试这样的事情：

Public Function GetRandomString(ByVal iLength As Integer) As String
    Dim sResult As String = ""
    Dim rdm As New Random()

    For i As Integer = 1 To iLength
        sResult &= ChrW(rdm.Next(32, 126))
    Next

    Return sResult
End Function

或者您可以执行定义有效字符的通用随机字符串：

Public Function GenerateRandomString(ByRef iLength As Integer) As String
    Dim rdm As New Random()
    Dim allowChrs() As Char = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLOMNOPQRSTUVWXYZ0123456789".ToCharArray()
    Dim sResult As String = ""

    For i As Integer = 0 To iLength - 1
        sResult += allowChrs(rdm.Next(0, allowChrs.Length))
    Next

    Return sResult
End Function

Answer 2

我认为这将适合您的要求，

 Private sub GenerateString()

 Dim xCharArray() As Char = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray
 Dim xNoArray() As Char = "0123456789".ToCharArray
 Dim xGenerator As System.Random = New System.Random()
 Dim xStr As String = String.Empty

        While xStr.Length < 6

            If xGenerator.Next(0, 2) = 0 Then
                xStr &= xCharArray(xGenerator.Next(0, xCharArray.Length))
            Else
                xStr &= xNoArray(xGenerator.Next(0, xNoArray.Length))
            End If

        End While

        MsgBox(xStr)

 End Sub

笔记： Tested With IDE

编辑： Modified according to SYSDRAGON's Comment