从存储过程返回值并在 C# 中使用它

Question

我创建了一个函数“Recover(string UserEmail)”，当他/她忘记登录信息时接收用户的电子邮件。此函数运行一个名为“Recover_PassWord”的存储过程，我希望它返回用户名和密码，以便我可以向用户发送电子邮件。我不太熟悉创建返回此信息的简单存储过程的语法。我也不太熟悉在 C# 中存储返回的值，所以我可以使用它。

Recover_PassWord：

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

恢复（字符串用户电子邮件）：

 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;
    }

有人对我如何实现这一目标有任何建议和建议吗？

Answer 1

试试下面的代码。如果有效，请将答案标记为肯定。谢谢！

    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;
    }

Answer 2

你必须使用：这样调用，

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

如果你使用参数：

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);