How to generate random Numbers in asp.net?

Add this method to your Page. This method takes a parameter i.e. what is the size of the number you want to generate.   

    private readonly Random _rng = new Random();   

    private const string _chars = "0123456789";

    private string RandomNumber(int size)

    {

        char[] buffer = new char[size];

        for (int i = 0; i < size; i++)

        {

            buffer[i] = _chars[_rng.Next(_chars.Length)];

        }

        return new string(buffer);

    }

Then, call this method wherever you want by passing the parameter as int. Here I am generating a new number each time I refresh the page. That's why I have called this method inside my Page_Load Event.

    protected void Page_Load(object sender, EventArgs e)

    {

        string ranNum =  RandomNumber(10);

        Response.Write(ranNum);

    }

Final Output:

Here, I am showing only four numbers generated randomly by passing the parameter value "10" for size of the string.

Regards,

Prajanuranjan....