從存儲過程返回值並在C＃中使用它

Question

我創建了一個函數“ Recover（string UserEmail）”，該函數可以在用戶忘記登錄信息時接收用戶的電子郵件。 此函數運行一個名為“ Recover_PassWord”的存儲過程，我希望它返回用戶名和密碼，以便向用戶發送電子郵件。 我不太熟悉用於創建返回此信息的簡單存儲過程的語法。 我也不太熟悉在C＃中存儲返回的值，因此我可以利用它。

恢復密碼：

   CREATE DEFINER=`root`@`localhost` PROCEDURE `Recover_Password`(IN Email CHAR(40))
BEGIN
  SELECT UserName,PassWord FROM  userdata
  WHERE Email=ContactEmail;
 END

恢復（字符串UserEmail）：

 public ActionResult Recover(string UserEmail)
    {
        Login model = new Login();
        MySqlConnection connect = DbConnection();
        MySqlCommand cmd = new MySqlCommand("Recover_PassWord",connect);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@Email", UserEmail);
        MySqlDataReader rd = cmd.ExecuteReader();
        while (rd.Read())
        {
            if (UserEmail == rd["ContactEmail"].ToString())
            {
                MailMessage msg = new MailMessage();
                msg.To.Add(UserEmail);
                msg.Subject = "Recovered Login Information";
                msg.Body = "Hello," + Environment.NewLine + "Your Login Information: "; //this is where i want to be able to use the returned value
            }
        }
        return null;
    }

任何人都對我如何實現這一目標有任何建議和意見？

Answer 1

您必須使用：像這樣打電話，

MySqlCommand cmd = new MySqlCommand("call Recover_PassWord",connect);

如果使用參數：

create procedure Recover_Password(Email char(40))
BEGIN
 SELECT UserName,PassWord FROM  userdata
  WHERE  ContactEmail =Email;
end

使用：

String emailInput = "thisIsMyEmailInput";
    MySqlCommand cmd = new MySqlCommand("call Recover_Password('" + emailInput + "')",connect);

Answer 2

嘗試下面的代碼。 如果可行，請將答案標記為肯定。 謝謝！

    public ActionResult Recover(string UserEmail)
    {
        Login model = new Login();
        MySqlConnection connect = DbConnection();
        MySqlCommand cmd = new MySqlCommand("Recover_PassWord",connect);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@Email", UserEmail);
        MySqlDataReader rd = cmd.ExecuteReader();
        while (rd.Read())
        {
            if (UserEmail == rd["ContactEmail"].ToString())
            {
                try
                {
                    SmtpClient mySmtpClient = new SmtpClient("my.smtp.exampleserver.net");

                    // set smtp-client with basicAuthentication
                    mySmtpClient.UseDefaultCredentials = false;
                    System.Net.NetworkCredential basicAuthenticationInfo = new System.Net.NetworkCredential("username", "password");
                    mySmtpClient.Credentials = basicAuthenticationInfo;                    

                    MailMessage msg = new MailMessage();
                    msg.To.Add(UserEmail);
                    msg.Subject = "Recovered Login Information";
                    msg.Body = "Hello," + Environment.NewLine + "Your Login Information: "; //this is where i want to be able to use the returned value

                    msg.Body += Environment.NewLine + "username:" + (string)rd["username"];
                    msg.Body += Environment.NewLine + "password:" + (string)rd["password"];          

                    mySmtpClient.Send(msg);

                }
                catch (SmtpException ex)
                {
                  throw new ApplicationException
                    ("SmtpException has occured: " + ex.Message);
                }
                catch (Exception ex)
                {
                   throw ex;
                }
            }
        }
        return null;
    }