12 digit unique random number generation in c# / asp.net : The Official Microsoft ASP.NET Forums

private static Random rng = new Random(Environment.TickCount);

        private static void GetNumber(object objlength)
        {
            for (int index = 0; index < 20; index++)
            {
                int length = Convert.ToInt32(objlength);
                var number = rng.NextDouble().ToString("0.000000000000").Substring(2, length);
                Console.WriteLine(number);
            }
        }

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Marked as answer by v.arunkarthik on Jun 28, 2012 12:57 PM

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tjaank

Contributor

6688 Points

1204 Posts

Re: 12 digit unique random number generation in c# / asp.net

Jun 28, 2012 11:52 AM|LINK

try using this:

public static Int64 GenerateRandomNumber(int size)
        {
            Random random = new Random((int)DateTime.Now.Ticks);
            StringBuilder builder = new StringBuilder();
            string s;
            for (int i = 0; i < size; i++)
            {
                s = Convert.ToString(Convert.ToInt32(Math.Floor(26 * random.NextDouble() + 65)));
                builder.Append(s);
            }

            return Convert.ToInt64((builder.ToString()));
        }

Talha Ashfaque -- Code Shode

Please Mark as Answer if this post helps you!

Edited by tjaank on Jun 28, 2012 11:54 AM

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shivanand G ...

Participant

1763 Points

534 Posts

Re: 12 digit unique random number generation in c# / asp.net

Jun 28, 2012 12:27 PM|LINK

Random ran = new Random();
string str= ran.Next(int minvalue.int maxvalue);

Good Luck

Warm Regards
shivanand.G.N (shivu.betta@gmail.com)

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v.arunkarthi...

Participant

1247 Points

341 Posts

Re: 12 digit unique random number generation in c# / asp.net

Jun 28, 2012 12:30 PM|LINK

Ramesh Chandra

Call below method 10,000 times in a loop
private static Random rng = new Random(Environment.TickCount);

        private static void GetNumber(object objlength)
        {
            for (int index = 0; index < 20; index++)
            {
                int length = Convert.ToInt32(objlength);
                var number = rng.NextDouble().ToString("0.000000000000").Substring(2, length);
                Console.WriteLine(number);
            }
        }
Hi,

thanks for replying.. i printed 10,000 numbers successfully..

but can this be alphanumeric? bcoz now they want it to be alphanumeric too.

Cheers!
karthik..

Please mark as Answer if it helps. !!???

Reply

tjaank

Contributor

6688 Points

1204 Posts

Re: 12 digit unique random number generation in c# / asp.net

Jun 28, 2012 12:33 PM|LINK

try this:

public static string GenerateRandomString(int size)
        {
            Random random = new Random((int)DateTime.Now.Ticks);//thanks to McAden
            StringBuilder builder = new StringBuilder();
            char ch;
            for (int i = 0; i < size; i++)
            {
                ch = Convert.ToChar(Convert.ToInt32(Math.Floor(26 * random.NextDouble() + 65)));
                builder.Append(ch);
            }

            return builder.ToString();
        }

Talha Ashfaque -- Code Shode

Please Mark as Answer if this post helps you!

Marked as answer by v.arunkarthik on Jun 28, 2012 12:57 PM

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sumitacc

Member

185 Points

53 Posts

Re: 12 digit unique random number generation in c# / asp.net

Jun 28, 2012 12:33 PM|LINK

int RandomNumber(int min, int max)
{
Random random = new Random();
return random.Next(min, max); 
}

the max and min no is min---> 12 digit min. no.

max---> 12 digit max no.

Sumit Choudhary
Software Developer
India

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