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Random String Generator

/ Published in: C#
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  1. public class RandomStringGenerator
  2.     {
  3.         private Random r;
  4.         const string UPPERCASE = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  5.         const string LOWERCASE = "abcdefghijklmnopqrstuvwxyz";
  6.         const string NUMBERS = "0123456789";
  7.         const string SYMBOLS = @"~`!@#$%^&*()-_=+<>?:,./\[]{}|'";
  8.  
  9.         public RandomStringGenerator()
  10.         {
  11.             r = new Random();
  12.         }
  13.  
  14.         public RandomStringGenerator(int seed)
  15.         {
  16.             r = new Random(seed);
  17.         }
  18.  
  19.         public virtual string NextString(int length)
  20.         {
  21.             return NextString(length, true, true, true, true);
  22.         }
  23.  
  24.         public virtual string NextString(int length, bool lowerCase, bool upperCase, bool numbers, bool symbols)
  25.         {
  26.             char[] charArray = new char[length];
  27.             string charPool = string.Empty;
  28.  
  29.             //Build character pool
  30.             if (lowerCase)
  31.                 charPool += LOWERCASE;
  32.  
  33.             if (upperCase)
  34.                 charPool += UPPERCASE;
  35.  
  36.             if (numbers)
  37.                 charPool += NUMBERS;
  38.  
  39.             if (symbols)
  40.                 charPool += SYMBOLS;
  41.  
  42.             //Build the output character array
  43.             for (int i = 0; i < charArray.Length; i++)
  44.             {
  45.                 //Pick a random integer in the character pool
  46.                 int index = r.Next(0, charPool.Length);
  47.  
  48.                 //Set it to the output character array
  49.                 charArray[i] = charPool[index];
  50.             }
  51.  
  52.             return new string(charArray);
  53.         }
  54.     }

URL: http://www.vcskicks.com/random-string-generator.php

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