static void Main(string[] args)
{
int option = 0;
// objects to CRUD class
MailUserCRUD user = MailUserCRUD.GetInstance();
// adding some pre existing users!
user.addUser("umair", "CS24");
user.addUser("Talha", "CS39");
user.addUser("Rizwaan", "CS23");
while (option != 3) // options
{
Console.Clear();
Console.WriteLine("#######################################");
Console.WriteLine(" APPLICATION SIGNIN/ SIGNUP ");
Console.WriteLine("#######################################");
Console.WriteLine("1- Login");
Console.WriteLine("2- Signup");
Console.WriteLine("3- Exit");
Console.WriteLine("Enter ");
option = int.Parse(Console.ReadLine());
Program P = new Program();// object to call respective function
if (option == 1)
{
P.signin();
}
else if (option == 2)
{
P.signup();
}
}
}
public static MailUserCRUD GetInstance()
{
// create the instance only if the instance is null
if (instance == null)
{
instance = new MailUserCRUD();
}
// Otherwise return the already existing instance
return(instance);
}
void signup()
{
Console.WriteLine("\n*Username: \t");
string name = Console.ReadLine();
Console.WriteLine("\n*Password: \t");
string password = Console.ReadLine();
// objects to CRUD class
MailUserCRUD obj = MailUserCRUD.GetInstance();
obj.addUser(name, password); // add user
Console.WriteLine("User added successfully!...");
Console.ReadKey();
}
void signin()
{
// user input
Console.WriteLine("\n*Username: \t");
string name = Console.ReadLine();
Console.WriteLine("\n*Password: \t");
string password = Console.ReadLine();
// objects to CRUD class
MailUserCRUD obj = MailUserCRUD.GetInstance();
bool found = obj.verifyUsers(name, password);// verify existing user in CURD class
if (found == true)
{
Console.WriteLine("Loggedin successfully");
}
else
{
Console.WriteLine("User doesn't exists!");
}
Console.ReadKey();
}
