public partial class Signup : System.Web.UI.Page
{
private string GenAuthCode(string username)
{
RandomStringGenerator myrsg = new RandomStringGenerator();
return myrsg.NextString(20);
}
}
public class RandomStringGenerator
{
private Random r;
const string Uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string Lowercase = "abcdefghijklmnopqrstuvwxyz";
const string Numbers = "0123456789";
const string Symbols = @"~`!@#$%^&()-_=+<>?:,./\[]{}'";
public RandomStringGenerator()
{
r = new Random();
}
public RandomStringGenerator(int seed)
{
r = new Random(seed);
}
public virtual string NextString(int Length)
{
return NextString(Length, true, true, true, true);
}
public virtual string NextString(int Length, bool lowerCase, bool upperCase, bool numbers, bool symbols)
{
char[] charArray = new char[Length];
string charpool = string.Empty;
//Build character pool
if (lowerCase)
charpool += lowerCase;
if (upperCase)
charpool += upperCase;
if (numbers)
charpool += numbers;
if (symbols)
charpool += symbols;
//Build the output character array
for (int i = 0; i < charArray.Length; i++)
{
//Pick the randim integer in the character pool
int index = r.Next(0, charpool.Length);
//Set it to the output character array
charArray[i] = charpool[index];
}
return new string(charArray);
}
}
