如何在C＃中验证Windows应用程序的咸密码和用户名？

我有一个简单的登录Windows应用程序。我已经在本地主机上成功创建了一个SQL数据库，其中包含用户名，密码（哈希），Salt和电子邮件等用户信息，并且还成功创建了一个用户注册表单，新用户可以在其中输入其详细信息，并将添加这些详细信息到数据库，它工作正常。

但是我无法根据包含要授予访问权限的数据库（localhost）中的用户数据的行中的存储值来验证用户名和密码。

我已经能够编写哈希，加盐和验证方法以备将来使用。

HashSalt.cs类

        // --- constructor to initialize num_of_iterations
        public HashSalt(int numOfIterations)
        {
            num_of_iterations = numOfIterations;
        }

        // --- Generate Salt ---
        public string  generateSalt()
        {
            var salt = new byte[32];

            var randomProvider = new RNGCryptoServiceProvider();
            randomProvider.GetBytes(salt);

            return Convert.ToBase64String(salt);        // returns salt as a string
        }

        // --- converts salt string into byte[]
        public byte[] saltToByte(string salt)
        {
            var byteSalt = Convert.FromBase64String(salt);
            return byteSalt;
        }

        // --- Generate hash of(pass+salt) ---
        public string generateHash(string password, byte[] salt)
        {

            var rfc2898 = new Rfc2898DeriveBytes(password, salt, num_of_iterations);

            var Password = rfc2898.GetBytes(32);    // gives 32 byte encoded password

            return Convert.ToBase64String(Password);    // returns hash
        }

        // --- Authenticate User ---
        public bool AuthenticateUser(string enteredPassword, string storedHash, string storedSalt)
        {
            var saltBytes = Convert.FromBase64String(storedSalt);
            var rfc2898DeriveBytes = new Rfc2898DeriveBytes(enteredPassword, saltBytes, 10000);
            return Convert.ToBase64String(rfc2898DeriveBytes.GetBytes(256)) == storedHash;
        }







    }
}

这是我的登录表单的Login.cs

private void btnSignin_Click(object sender, EventArgs e)
        {
            string enteredPass = txtLoginPassword.Text;

            DbHandler db = new DbHandler();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            DataTable table = new DataTable();
            MySqlCommand cmd = new MySqlCommand("SELECT password, salt FROM student WHERE indexno=@index;", db.getConnection());
            db.openConnection();    // open connection

                cmd.Parameters.Add("@index", MySqlDbType.VarChar).Value = txtLoginusername.Text;

                adapter.SelectCommand = cmd;
                adapter.Fill(table);

                if (table.Rows.Count > 0)
                {
                    string pass = table.Rows[0][0].ToString();
                    string salt = table.Rows[0][1].ToString();

                    string newPass = hashSalt.generateHash(enteredPass, hashSalt.saltToByte(salt));

                    if (hashSalt.authenticateUser(enteredPass, pass, salt))
                    {
                        // MessageBox.Show("correct ='" + pass + "'\nEntered pass ='" + hashSalt.authenticateUser(enteredPass, pass, salt) + "'");
                        // --- form Records obj
                        Records gotoRecords = new Records();
                        gotoRecords.Show(); // goto Records
                        this.Hide();

                }
                    else
                    {
                        string message = "User name & Password did not Match!?";
                        string title = "Attention!";
                        MessageBoxButtons buttons = MessageBoxButtons.OK;
                        DialogResult result = MessageBox.Show(message, title, buttons, MessageBoxIcon.Warning);
                    }

                }
                else
                {
                    string message = "User name NotFound!?";
                    string title = "Attention!";
                    MessageBoxButtons buttons = MessageBoxButtons.OK;
                    DialogResult result = MessageBox.Show(message, title, buttons, MessageBoxIcon.Warning);
                }
            //this.Close();
            db.openConnection();    // close connection

数据库结构 如果您能给我一些指导，我将不胜感激。