code for generating username and password dynamically

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 Id,to mobile which are given by user registration form in asp.net (n-tier architecture)

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 < length; i++)

{

if (useLetter)

{

chars[i] = charsandspecialonly[rd.Next(0, charsandspecialonly.Length)];

}

else

{

chars[i] = numberonly[rd.Next(0, numberonly.Length)];

}

return new string(chars);

}

1 Reply

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Javeed M Shaikh13y ago
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 < length; i++)
{
if (useLetter)
{
chars[i] = charsandspecialonly[rd.Next(0, charsandspecialonly.Length)];

}
else
{
chars[i] = numberonly[rd.Next(0, numberonly.Length)];

}

}

return new string(chars);
}