[RESOLVED] Random string

¿there are already some function in .NET which returns a random string?

(Is better if it contains chars which humans do not use frequently, like ╚)

maybe there are some to generate random keys.

this generate random paths:

System.IO.Path.GetRandomFileName() As String
for example, it returns:"gdhxyjvj.fnf"

Is the best I have, but I would like less usual chars, and I are being lazy to write a random routine.

An obscure class is System.Security.Cryptography. Looks promising, but I can't locate a random string function.
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Code:

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    Private Function GenerateKey(ByVal KeyLength As Integer) As String
        Dim RandomClass As New Random
        Dim Key As String = ""

        For i As Integer = 1 To KeyLength
            Dim iNextRnd As Integer = RandomClass.Next(0, 255)
            Key &= Chr(iNextRnd).ToString
        Next
        Return Key
    End Function

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Quote:

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Originally Posted by HairyMonkeyMan

Code:

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    Private Function GenerateKey(ByVal KeyLength As Integer) As String
        Dim RandomClass As New Random
        Dim Key As String = ""

        For i As Integer = 1 To KeyLength
            Dim iNextRnd As Integer = RandomClass.Next(0, 255)
            Key &= Chr(iNextRnd).ToString
        Next
        Return Key
    End Function

---

---

I eventually made:

Code:

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        Public Function RandomString(ByVal Lenght As Integer) As String
                Dim Answer As New System.Text.StringBuilder()
                For i As Integer = 1 To Lenght  ' for character 1 to Lenght
                        Randomize()                               
                        Answer.Append(Chr(256 * Rnd()))
                Next i
                Return Answer.ToString
        End Function

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And your code made me do:

Code:

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        Public Function RandomString(ByVal Lenght As Integer) As String
                Dim RandomClass As New Random
                Dim Answer As New System.Text.StringBuilder()

                For i As Integer = 1 To Lenght  ' for character 1 to Lenght 
                        Answer.Append(Chr(RandomClass.Next(0, 255)))
                Next i
                Return Answer.ToString
        End Function

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Which I think is better.
Thanks you.
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What exactly is the requirement?

Do you just want a random string or are you looking for encryption?

Quote:

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Originally Posted by Shuja Ali

What exactly is the requirement?

Do you just want a random string or are you looking for encryption?

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Just random string. I need it to have a low probability to be created/utilised/needed by the User.

Is only needed to this thread: Smallest and Longest String


I hate writing long lines of code, when performance is not a concern, and was also looking for learn new .NET resources.
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just a side note:

you should store the RandomClass reference as a module-wide variable.. each time it is instantiated, it reverts back to the first character and outputs the same sequence. If it is module wide, you only need to instantiate it once.

Regards