最近几天由于公司发送了大量内容相同的邮件,而被国外的反垃圾邮件组织列入了黑名单,致使很多客户收不到我们的邮件,客服接到投诉,而之前做的一个查询日志的小页面,因为某种原因,访问速度很慢,甚至这几天人一多,页面就总是超时.刚开始以为是程序问题或者是数据量比较大,但是程序也只是一句简单的两表联查,两张表大概也就200W左右的数据,在线下跑的时候速度很快,可是一到线上就慢了很多.后来到系统组那边找了一下,发现是线上的机器在连数据库的时候,没有将数据库的IP添加到Host里,添进去之后速度瞬间就提了上去.
昨天在研究解决策略的时候,同事建议建立一个定时任务,将查询的结果以附件的形式发送给查询人,所以写了一个控制台程序来跑.因为以前没有接触过这方面的东西,所以查了很多,最后还是发现MSDN真是个好东西,呵呵,不说了,代码帖上来,大家把***换成自己的邮件服务器,然后发件人和收件人相应地改一下,程序就可以跑了.有什么问题还请大家积极地反应,帮助小弟提高.
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Collections;
using System.Net;
using System.Net.Mime;
using System.Net.Mail;
namespace SendEmail
{
class Program
{
//smtp.UseDefaultCredentials = true;
//client.Credentials = CredentialCache.DefaultNetworkCredentials;
static void Main(string[] args)
{
//DefaultSendEmail();
// WriteEmail();
Console.WriteLine(WriteEmail().ToString());
//CreateMessageWithAttachment();
}
//Single receiver test.MSDN上最简单的发送邮件
public static void DefaultSendEmail(string server)//你的邮件服务器
{
string to = "job.chang@live.cn";
string from = "job.chang@live.cn";
string subject = "Using the new SMTP client.";
string body = @"Using this new feature, you can send an e-mail message from an application very easily.";
MailMessage message = new MailMessage(from, to, subject, body);
SmtpClient client = new SmtpClient(server);
//Console.WriteLine("Changing time out from {0} to 100.", client.Timeout);
//client.Timeout = 100;
// Credentials are necessary if the server requires the client
// to authenticate before it will send e-mail on the client's behalf.
client.Credentials = CredentialCache.DefaultNetworkCredentials;
client.Send(message);
Console.WriteLine("Email sended.");
}
//Multiply users test.
public static string MultiSendEmail(string mailFrom,string mailTo,string mailCC,string mailHead,string mailBody,ArrayList mailAttach,bool isHtml)
{
//改用XML文件在Web.Configure中配置.
string eServer = "***.**.**.**";//需要换成你的邮件服务器
int ePort = 25;//默认
MailMessage eMail = new MailMessage();
SmtpClient eClient = new SmtpClient(eServer,ePort);
eClient.UseDefaultCredentials = true;
eMail.Subject = mailHead;
eMail.SubjectEncoding = Encoding.UTF8;
eMail.Body = mailBody;
eMail.BodyEncoding = Encoding.UTF8;
eMail.From = new MailAddress(mailFrom);
//Receiver
string[] arrMailAddr;
try
{
//用";"分割多个收件人.
eMail.To.Clear();
if(!string.IsNullOrEmpty(mailTo))
{
arrMailAddr=mailTo.Split(';');
foreach(string strTo in arrMailAddr)
{
if(!string.IsNullOrEmpty(strTo))
{
eMail.To.Add(strTo);
}
}
}
//用";"分割多个抄送人.
eMail.CC.Clear();
if(!string.IsNullOrEmpty(mailCC))
{
arrMailAddr=mailCC.Split(';');
foreach(string strCC in arrMailAddr)
{
if(!string.IsNullOrEmpty(strCC))
{
eMail.CC.Add(strCC);
}
}
}
//用";"分割多个秘件抄送人.
//eMail.Bcc.Clear();
//if(!string.IsNullOrEmpty(mailBCC))
//{
// arrMailAddr=mailBCC.Split(';');
// foreach(string strBCC in arrMailAddr)
// {
// if(!string.IsNullOrEmpty(strBCC))
// {
// eMail.Bcc.Add(strBCC);
// }
// }
//}
if(isHtml)
{
eMail.IsBodyHtml=true;
}
else
{
eMail.IsBodyHtml=false;
}
//Attachment
eMail.Attachments.Clear();
if(mailAttach!=null)
{
for(int i=0;i<mailAttach.Count;i++)
{
if(!string.IsNullOrEmpty(mailAttach[i].ToString()))
{
eMail.Attachments.Add(new Attachment(mailAttach[i].ToString()));
}
}
}
eClient.Send(eMail);
return "邮件已发送,请查收!";
}
catch(Exception ex)
{
return "邮件发送失败,原因:"+ex.Message.ToString();
}
}
public static string strMailFrom;
public static string strMailTo;
public static string strMailCC;
public static string strMailSubject;
//public static string strStartTime;
//public static string strEndTime;
public static string strMailBody;
public static ArrayList arrAttachment;
public static string WriteEmail()
{
strMailFrom = "job.chang@live.cn";
Console.WriteLine("请输入收件人邮箱,以"+";"+"间隔!");
strMailTo = Console.ReadLine().ToString();
strMailCC = "job.chang@live.cn";
strMailSubject = "Test Mail";
strMailBody = "Test Mail";
arrAttachment=new ArrayList ();
arrAttachment.Add(@"c:\cmd.txt");
arrAttachment.Add(@"c:\job.txt");
arrAttachment.Add(@"c:\t.txt");
return MultiSendEmail(strMailFrom,strMailTo,strMailCC,strMailSubject,strMailBody,arrAttachment ,false );
}
//微软家自带的发送带附件.
public static void CreateMessageWithAttachment(string server)
{
// Specify the file to be attached and sent.
// This example assumes that a file named Data.xls exists in the
// current working directory.
string file = @"c:\t.txt";
// Create a message and set up the recipients.
MailMessage message = new MailMessage(
"job.chang@live.cn",
"job.chang@live.cn",
"Quarterly data report.",
"See the attached spreadsheet.");
// Create the file attachment for this e-mail message.
Attachment data = new Attachment(file, MediaTypeNames.Application.Octet);
// Add time stamp information for the file.
ContentDisposition disposition = data.ContentDisposition;
disposition.CreationDate = System.IO.File.GetCreationTime(file);
disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
// Add the file attachment to this e-mail message.
message.Attachments.Add(data);
//Send the message.
SmtpClient client = new SmtpClient(server);
// Add credentials if the SMTP server requires them.
client.Credentials = CredentialCache.DefaultNetworkCredentials;
client.Send(message);
// Display the values in the ContentDisposition for the attachment.
ContentDisposition cd = data.ContentDisposition;
Console.WriteLine("Content disposition");
Console.WriteLine(cd.ToString());
Console.WriteLine("File {0}", cd.FileName);
Console.WriteLine("Size {0}", cd.Size);
Console.WriteLine("Creation {0}", cd.CreationDate);
Console.WriteLine("Modification {0}", cd.ModificationDate);
Console.WriteLine("Read {0}", cd.ReadDate);
Console.WriteLine("Inline {0}", cd.Inline);
Console.WriteLine("Parameters: {0}", cd.Parameters.Count);
foreach (DictionaryEntry d in cd.Parameters)
{
Console.WriteLine("{0} = {1}", d.Key, d.Value);
}
data.Dispose();
}
}
}
)
