Windows 10: Random Number Generation

I'm writing a jukebox in Visual Studio vb.net. I'm attempting to utilise random number generators to swap the image of the record label being played which works fine


Dim r As New System.RandomCTypeSystem.DateTime.Now.Ticks Mod System.Int32.MaxValue, Integer

Public Function GetRandomNumberOptional ByVal Low As Integer = 1, Optional ByVal High As Integer = 100 As Integer
' Returns a random number, between the optional Low and High parameters
Return r.NextLow, High + 1

End Function

gRecordLabelImage = gDefaultLabelImageGetRandomNumber0, gDefaultLabelImageCount - 1

However, when trying to utilise this code to get the next 5 records to be played when implementing random play, the code calls work first time through but give me the same 5 random numbers on the next call.


For LoopCounter = 1 To 5

Counter = GetRandomNumber1,TracksDataSet.Count - 1

gTrackFileName = TracksDataSetCounter.PlayListTrackFileName

Next


I've tried RNGCryptoService Provider


Dim Provider As New RNGCryptoServiceProvider

Public Function GenerateRandomByRef MaxValue As Integer As Integer
Dim result As Integer

Using Provider
Dim data As Byte = New Byte3 {}
Provider.GetBytesdata
result = BitConverter.ToUInt32data, 0 Mod MaxValue + 1
End Using

Return Result

End Function

For LoopCounter = 1 to 5

Counter = GenerateRandomTracksDataSet.Count

gTrackFileName = TracksDataSetCounter.PlayListTrackFileName

Next

But this does exactly the same. Please note though that the 5 repeated random numbers are different every time code is started, they just repeat while code is running.


I've worn myself out in Google and web forums - they all say the same - the code should work, so what is my problem. Any Help gratefully accepted


thanks - Graeme Baillie

:)

 

Generating Random Numbers (Need help ASAP!)

Working on a math problem.

• First, I need to generate a random integer from 1 to 6. I need to keep doing this until I get the number 3. I need to record how many numbers had to be generated.
• Second, I need to generate random integers from 1 to 6 until I have picked every number once. Again, I need to know how many numbers were generated.

I need to do each situation a certain number of times (which is up to me) to get an average of how many numbers had to be generated in order to meet the condition.

Being the overachiever that I am, I'd like to generate an absurd number of trials. So I want to do the first situation a huge number of times and then get the average. Same for situation 2. Is there any way I could use my computer to do this? My Q6600 is on Windows and my 2GHz Core Duo laptop runs Ubuntu.

 

Generating Random Numbers (Need help ASAP!)

Hm. Its almost 2 here so for the sake of simplicity, I'll just use my calculator.

Edit 1: Ok, got the first one done. TI-83 is slooow. Does ~2.3 trials/sec. Takes 7 min for 1000.

Working on 2nd one now. 2:30am and counting.

Edit 2: I gotta stop, it's too late. I'm having problems with the second program. First I fill a list with six zeros. Then, I make a random integer 1-6. I store it in a list to it's corresponding index. So if the random number was 1 then it gets stores in L1(1). An index with a value of 0 means that index has not been chosen yet.

I'm having trouble getting the checking loops to work. No time to explain it now, but basically the checking loops go like this. Check L1(1) for value of 0. If true, stop checking and go back to generating random numbers. If L1(1) is not zero check L1(2). (and so on) If L1(6) is not zero, break from all loops and display how many times the main while loop ran.

Tomorrow is gonna suck. I don't do well with little sleep. *Bang Head :banghead:

 

Windows 10 pseudo random number generator infrastructure white paper

Source: https://www.microsoft.com/security/b...nfrastructure/