code for generating username and password dynamically

Question

In registration form user will give his/her first name and last name.By using these names we have to generate unique Username and password for that user and send these to his/her mail Idto mobile which are given by user registration form in asp.net (n-tier architecture)

Javeed M Shaikh · Answer

Ideally you should create GUID if you want unique strings but GUID is very big for a username or password. You can also try to generate random alphanumeric text as username/password but you have to make sure that you check that this does not exists for any existing user before you send the email. Here is an example: you can use the useLetter parameter to generate username in alphabets and password in numbers or change the code to use both. public static string GenerateString(int length bool useLetter) { string charsandspecialonly = ABCDEFGHJKLMNOPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz; string numberonly = 1234567890; char[] chars = new char[length]; Random rd = new Random(); for (int i = 0; i { if (useLetter) { chars[i] = charsandspecialonly[rd.Next(0 charsandspecialonly.Length)]; } else { chars[i] = numberonly[rd.Next(0 numberonly.Length)]; } } return new string(chars); }