How to generate 5 Digit Number in a role

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Good day, Please i need some help, this is what i want to achieve. I want to generate like 5 random numbers and have them stored in the database example
13456
12564
35565
34466
34566
23456
34677

C#

//I know that using this 
 static Random rand = new Random();
 lbl1.Text = Convert.ToString(rand.Next(10000, 99999));
gives me 23445
my concern now is how to generate those numbers like 30 at same time as i have explaned above and have them saved in the database...

thanks, I do appreciate your effort..

Posted 23-Dec-14 0:54am

Difameg Network Nigeria

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Praveen Kumar Upadhyay 23-Dec-14 7:07am

So you want 30 random numbers having 5 digits??

2 solutions

Solution 2

C#

private const int NumberOfRandomInts = 30;

// initialize the Random generator outside any loop !
Random rnd = new Random((int) DateTime.Now.Ticks & 0x0000FFFF);

List<int> rndIntList = new List<int>(NumberOfRandomInts );

while(rndIntList.Count < NumberOfRandomInts )
{
    int i = rnd.Next(10000, 99999);

    if (rndIntList.Contains(i)) continue;

    rndIntList.Add(i);
}</int></int>

Now store the content of 'rndIntList in your Database as required.

Posted 23-Dec-14 1:40am

BillWoodruff

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Praveen Kumar Upadhyay · Accepted Answer · 2014-12-23T01:13:00

Solution 1

Check out below code, it will give you 30 random 5 digits numbers.

C#

List<int> numbers = new List<int>();

for (; numbers.Count < 30; )
{
    int i = new Random().Next(10000, 99999);
    if (numbers.Contains(i)) continue;

    numbers.Add(i);
}

if condition is been mentioned in the code, so that numbers should not contain duplicate numbers. You can change the for loop condition depend how many numbers you want.

Posted 23-Dec-14 1:13am

Praveen Kumar Upadhyay

Updated 23-Dec-14 1:15am

v2

Comments

Maciej Los 23-Dec-14 7:17am

+5

Praveen Kumar Upadhyay 23-Dec-14 7:21am

Thanks a lot Maciej

Difameg Network Nigeria 23-Dec-14 7:24am

thanks, Do i need to use Gridview to view them? how do i save the entire 30 numbers to the database

Praveen Kumar Upadhyay 23-Dec-14 7:26am

You can use Gridview to view them, once it is stored into the database. To store into the database simply use insert query.

Difameg Network Nigeria 23-Dec-14 7:32am

thanks, can you please show me how to, i have tried using this //Label1.Text = numbers.ToString();
just to see if the generated numbers can be visible but i am having this error code
System.Collections.Generic.List`1[System.Int32]
can you please show me how to insert them
thanks

Praveen Kumar Upadhyay 23-Dec-14 7:34am

Label1.Text = string.Join(",", numbers);