我需要在 SQL 服务器数据库和所有电子邮件中遍历 table 中的电子邮件地址

Question

我想知道是否有人可以帮助我。我有一个简单的 Suppliers table，其中包含我的供应商的电子邮件地址。

我需要遍历 SQL 服务器数据库 SpecCars Suppliers table 中的电子邮件地址 'SuppEmail' 并将所有电子邮件发送给他们下面。

我已经用了几天了，在网上查看并尝试了许多不同的变体，但无论我做什么，它只发送一封电子邮件到 table 中的第一个条目 frontdesk@jacksauto.com.au，仅此而已。

如果你能帮忙，那就太好了。这是一个 ASP.NET C# 解决方案。

这是Supplierstable，里面只有两条记录：

CREATE table Suppliers
(
    SuppId      INT IDENTITY(1,1)  PRIMARY KEY,
    SuppName    NVARCHAR(60)       NOT NULL, 
    SuppAddress NVARCHAR(150)      NOT NULL, 
    SuppSuburb  NVARCHAR(60)       NOT NULL, 
    SuppState   NVARCHAR(30)       NOT NULL, 
    SuppPost    NVARCHAR(10)       NOT NULL,
    SuppPhone   NVARCHAR(10)       NOT NULL,
    SuppEmail   NVARCHAR(100)      NOT NULL,
    SuppCode    NVARCHAR(10)       NOT NULL
)

Insert into Suppliers (SuppName, SuppAddress, SuppSuburb, SuppState, SuppPost, SuppPhone, SuppEmail, SuppCode) 
values ('Jacks Auto', '2 Jill Street', 'Belgrade', 'VIC', '3299', '9555 4457', 'frontdesk@jacksauto.com.au', 'JACBLA')

Insert into Suppliers (SuppName, SuppAddress, SuppSuburb, SuppState, SuppPost, SuppPhone, SuppEmail, SuppCode) 
values ('Ultimate Lights', '205 Browns Road', 'Tullamarine', 'VIC', '3011', '9877 2255', 'orders@ultimatlights.com.au', 'ULTTUL')

这是代码片段：

  SqlDataReader sqlData;
  SqlConnection connection = new SqlConnection("Data Source=.;Initial Catalog=SpecCars;Integrated Security=True");

  connection.Open();
  sqlData = new SqlCommand("Select SuppEmail From Suppliers", connection).ExecuteReader();

  int count = sqlData.FieldCount;

  while (sqlData.Read())
  {
     for (int i = 0; i < count; i++)
    {
      string emailnew = sqlData[i].ToString();

        MailMessage mailMessage = new MailMessage();

        mailMessage.From = new MailAddress("myemail.com");
        mailMessage.To.Add("myemail.com");
        mailMessage.To.Add(emailnew);
        //mailMessage.CC.Add(emailnew);
        mailMessage.Subject = "Assembly Line Stop";
        mailMessage.Priority = MailPriority.High;

        mailMessage.Body = "Please be advised that the assembly line at Specialised Cars has STOPPED. You will be notified once the line has started again. Any Services between the LINE STOP and the LINE START will be carried out after 19:00 (7pm).";
        mailMessage.IsBodyHtml = true;

        SmtpClient smtpClient = new SmtpClient("smtp-mail.myprovider.com", 587);
        smtpClient.EnableSsl = true;
        smtpClient.Credentials = new System.Net.NetworkCredential("myemail.com", "password");
        smtpClient.Send(mailMessage);
    }
}
connection.Close();

Answer 1

试试这个：

var mailMessage = CreateMessage();
using(var connection = new SqlConnection("Data Source=.;Initial Catalog=SpecCars;Integrated Security=True"))
{
    connection.Open();
    using(var sqlData = new SqlCommand("Select SuppEmail From Suppliers", connection).ExecuteReader())
    {
        while (sqlData.Read())
        {
            mailMessage.Bcc.Add(emailnew);
        }
    }
}
SendMessage(mailMessage)


private MailMessage CreateMessage()
{
    var mailMessage = new MailMessage();
    mailMessage.From = new MailAddress("myemail.com");
    mailMessage.To.Add("myemail.com");

    mailMessage.Subject = "Assembly Line Stop";
    mailMessage.Priority = MailPriority.High;

    mailMessage.Body = "Please be advised that the assembly line at Specialised Cars has STOPPED. You will be notified once the line has started again. Any Services between the LINE STOP and the LINE START will be carried out after 19:00 (7pm).";
    mailMessage.IsBodyHtml = true;
    return mailMessage;
}

private void SendMessage(MailMessage mailMessage)
{
    var smtpClient = new SmtpClient("smtp-mail.myprovider.com", 587);
    smtpClient.EnableSsl = true;
    smtpClient.Credentials = new System.Net.NetworkCredential("myemail.com", "password");
    smtpClient.Send(mailMessage);
}

注意：这段代码可以而且应该更好。考虑重构以从 web.config 获取连接字符串和邮件设置，而不是将它们硬编码到您的应用程序中。

Answer 2

 //-----------------

//Hi All, just a quick update:


//Trying8.aspx - Finally Works, it sends LINE STOP Email to every SuppEmail recipient in Suppliers Table

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Trying8.aspx.cs" Inherits="SpecCars.Admin.Trying8" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
      <br />
      <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    </div>
    </form>
</body>
</html>

//-----------------

//Trying8.aspx.cs - Finally Works, it sends LINE STOP Email to every SuppEmail recipient in Suppliers Table

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Net;
using System.Net.Mail;
using System.Text;

namespace SpecCars.Admin
{
  public partial class Trying8 : System.Web.UI.Page
  {
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button1_Click(object sender, EventArgs e)
    {

      SqlDataReader sqlData;
      SqlConnection connection = new SqlConnection("Data Source=.;Initial Catalog=SpecCars;Integrated Security=True");
      connection.Open();

      sqlData = new SqlCommand("Select * From Suppliers", connection).ExecuteReader();
      using (SmtpClient smtpClient = new SmtpClient("smtp-mail.provider.com", 587))
      {
        while (sqlData.Read())
        {
          string emailnew = sqlData["SuppEmail"].ToString();
          Label1.Text = emailnew.ToString();

          using (MailMessage message = new MailMessage())
          {
            try
            {
              message.From = new MailAddress("myemail@outlook.com");
              // This doesn't Send (To:) myotheremail@yahoo.com.au
              MailAddress AddressTo = new MailAddress("myotheremail@yahoo.com.au");
              // This does Send (To:) to SuppEmail recipient in Suppliers Table
              message.To.Add(emailnew);
              //This does Send a (CC:) myotheremail@yahoo.com.au
              message.CC.Add("myotheremail@yahoo.com.au");
              message.Subject = "Assembly Line Stop";
              message.Priority = MailPriority.High;

              message.Body = "Please be advised that the assembly line at Specialised Cars has STOPPED. You will be notified once the line has started again. Any Services between the LINE STOP and the LINE START will be carried out after 19:00 (7pm).";
              message.IsBodyHtml = true;

              smtpClient.EnableSsl = true;
              smtpClient.Credentials = new System.Net.NetworkCredential("myemail@outlook.com", "password");
              smtpClient.Send(message);
              // smtpClient.Dispose();
              // message.Dispose();
            }
            catch (Exception ex)
            {
              //log exceptions here, you can write it to a txt file, or to a label in your form for testing purpose
              //we are trying to see if you get an exception..
              Label1.Text = ex.Message;
            }
          }
        }
      }

    }
  }
}

//-----------------

我需要在 SQL 服务器数据库和所有电子邮件中遍历 table 中的电子邮件地址

I need to loop through the email addresses in a table within a SQL Server database and all an Email

sql-server

asp.net

sqldatareader

smtpclient