從存儲過程中返回值並在C＃中使用它

我創建了一個函數「Recover（string UserEmail）」，該函數在用戶忘記其登錄信息時接收用戶的電子郵件。該函數運行名爲「Recover_PassWord」的存儲過程，我希望它返回用戶名和密碼，以便我可以發送電子郵件給用戶。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，所以我可以使用它。

Recover_PassWord：
從存儲過程中返回值並在C＃中使用它

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; 
    }

任何人有我如何才能做到這一點的任何建議和意見？

來源

2017-07-27 julianc

你嘗試使用實體框架嗎？ –

我沒有。最近有沒有關於如何使用它的文章？ – julianc

你應該嘗試一下，真的很容易使用它調用SP http://www.entityframeworktutorial.net/EntityFramework5/setup-entityframework-environment.aspx –

嘗試下面的代碼。如果有效，請將答案標爲正面。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; 
    }

來源

2017-07-28 00:00:54

不應該「mySmtpClient.Send（myMail）;」是「mySmtpClient.Send（msg）;」？ – julianc

哇，對不起，我在這裏得到了我的代碼，沒錯，只是改變！更正上面的代碼！ –

除了我得到一個smtpexception幾乎作品。「發送郵件失敗」沒有InnerException。你知道可能是什麼問題嗎？ – julianc

你必須使用：這樣調用，

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

如果您使用的參數：

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);

來源

2017-07-27 23:54:11

如果是存儲過程而不是函數。函數和存儲過程是不同的。 –

從存儲過程中返回值並在C＃中使用它

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