c#求最精辟代码的邮件发送代码！只要能实现发送就可以!

Question

用.Net.Mail，谢谢了！晚上请吃饭
求最简短的邮件发送代码！只要能实现发送就可以! 不需要什么大的功能，只要能发送
哎呀妈呀！太简短了 ，谢谢昂！

Answer 1

/// <summary>
/// Discuz!NT邮件发送类的调用封装类
/// </summary>
public class Emails
{
protected static GeneralConfigInfo configinfo = GeneralConfigs.GetConfig();

protected static ISmtpMail ESM;

protected static EmailConfigInfo emailinfo = EmailConfigs.GetConfig();

static Emails()
{
if (emailinfo.DllFileName.ToLower().IndexOf(".dll") <= 0)
{
emailinfo.DllFileName = emailinfo.DllFileName + ".dll";
}
try
{
//读取相应的DLL信息
Assembly asm = Assembly.LoadFrom(HttpRuntime.BinDirectory + emailinfo.DllFileName);
ESM = (ISmtpMail)Activator.CreateInstance(asm.GetType(emailinfo.PluginNameSpace, false, true));
}
catch
{
try
{
//读取相应的DLL信息
Assembly asm = Assembly.LoadFrom(Utils.GetMapPath("/bin/" + emailinfo.DllFileName));
ESM = (ISmtpMail)Activator.CreateInstance(asm.GetType(emailinfo.PluginNameSpace, false, true));
}
catch
{
ESM = new SmtpMail();
}
}
}

//重设置当前邮件发送类的实例对象
public static void ReSetISmtpMail()
{
try
{
emailinfo = EmailConfigs.GetConfig();
//读取相应的DLL信息
Assembly asm = Assembly.LoadFrom(HttpRuntime.BinDirectory + emailinfo.DllFileName);
ESM = (ISmtpMail)Activator.CreateInstance(asm.GetType(emailinfo.PluginNameSpace, false, true));
}
catch
{
try
{
//读取相应的DLL信息
Assembly asm = Assembly.LoadFrom(Utils.GetMapPath("/bin/" + emailinfo.DllFileName));
ESM = (ISmtpMail)Activator.CreateInstance(asm.GetType(emailinfo.PluginNameSpace, false, true));
}
catch
{
ESM = new SmtpMail();
}
}
}

/// <summary>
/// 定义邮件内容函数
/// </summary>
/// <param name="UserName">用户名</param>
/// <param name="Email">EMAIL地址</param>
/// <param name="pass">相应注册用户的密码(暂时无设置)</param>
/// <returns></returns>
public static bool DiscuzSmtpMail(string UserName, string Email, string pass)
{
string forumurl = "http://" + DNTRequest.GetCurrentFullHost() + BaseConfigs.GetForumPath.ToLower();

try
{
ESM.RecipientName = UserName;//设定收件人姓名
ESM.AddRecipient(Email);//设定收件人地址(必须填写)。
ESM.MailDomainPort = emailinfo.Port;
ESM.From = emailinfo.Sysemail;
ESM.FromName = configinfo.Webtitle;
ESM.Html = true;
ESM.Subject = "已成功创建你的 " + configinfo.Forumtitle + "帐户,请查收.";

StringBuilder body = new StringBuilder();
body.Append(emailinfo.Emailcontent.Replace("{webtitle}", configinfo.Webtitle));
body.Replace("{weburl}", "<a href=" + configinfo.Weburl + ">" + configinfo.Weburl + "</a>");
body.Replace("{forumurl}", "<a href=" + forumurl + ">" + forumurl + "</a>");
body.Replace("{forumtitle}", configinfo.Forumtitle);

ESM.Body = "<pre style=\"width:100%;word-wrap:break-word\">" + body.ToString() + "</pre>";
ESM.MailDomain = emailinfo.Smtp;
ESM.MailServerUserName = emailinfo.Username;
ESM.MailServerPassWord = emailinfo.Password;

//开始发送
return ESM.Send();
}
catch
{
return false;
}
}

/// <summary>
/// 定义邮件内容函数
/// </summary>
/// <param name="UserName">用户名</param>
/// <param name="Email">EMAIL地址</param>
/// <param name="pass">相应注册用户的密码(暂时无设置)</param>
/// <param name="authstr">相应注册用户的激活链接串参数</param>
/// <returns></returns>
public static bool DiscuzSmtpMail(string UserName, string Email, string pass, string authstr)
{
string forumurl = "http://" + DNTRequest.GetCurrentFullHost() + BaseConfigs.GetForumPath.ToLower();

try
{
ESM.RecipientName = UserName;//设定收件人姓名
ESM.AddRecipient(Email);
ESM.MailDomainPort = emailinfo.Port;
ESM.From = emailinfo.Sysemail;
ESM.FromName = configinfo.Webtitle;
ESM.Html = true;
ESM.Subject = "已成功创建你的 " + configinfo.Forumtitle + "帐户,请查收.";

StringBuilder body = new StringBuilder();
body.Append(emailinfo.Emailcontent.Replace("{webtitle}", configinfo.Webtitle));
body.Replace("{weburl}", "<a href=" + configinfo.Weburl + ">" + configinfo.Weburl + "</a>");
body.Replace("{forumurl}", "<a href=" + forumurl + ">" + forumurl + "</a>");
body.Replace("{forumtitle}", configinfo.Forumtitle);

ESM.Body = "<pre style=\"width:100%;word-wrap:break-word\">" + body.ToString() + "\r\n\r\n" + "激活您帐户的链接为:<a href=" + forumurl + "activationuser.aspx?authstr=" + authstr.Trim() + " target=_blank>" + forumurl + "activationuser.aspx?authstr=" + authstr.Trim() + "</a></pre>";
ESM.MailDomain = emailinfo.Smtp;
ESM.MailServerUserName = emailinfo.Username;
ESM.MailServerPassWord = emailinfo.Password;

return ESM.Send();
}
catch
{
return false;
}
}

/// <summary>
/// 邮件通知服务
/// </summary>
/// <param name="Email">email地址</param>
/// <param name="title">邮件的标题</param>
/// <param name="body">邮件内容</param>
/// <returns></returns>
public static bool SendEmailNotify(string Email, string title, string body)
{
try
{

ESM.AddRecipient(Email);
ESM.MailDomainPort = emailinfo.Port;
ESM.From = emailinfo.Sysemail;//设定发件人地址(必须填写)
ESM.FromName = configinfo.Webtitle;
ESM.Html = true;//设定正文是否HTML格式。
ESM.Subject = title;

ESM.Body = "<pre style=\"width:100%;word-wrap:break-word\">" + body.ToString() + "</pre>";
ESM.MailDomain = emailinfo.Smtp;
ESM.MailServerUserName = emailinfo.Username;
ESM.MailServerPassWord = emailinfo.Password;

//开始发送
return ESM.Send();
}
catch
{
return false;
}
}

/// <summary>
/// 向指定用户发送email，每次最多能给100人发邮件
/// </summary>
/// <param name="usernamelist">用户名列表</param>
/// <param name="subject">主题</param>
/// <param name="body">内容</param>
/// <returns></returns>
public static string SendMailToUsers(string usernamelist, string subject, string body)
{
DataTable dt = DatabaseProvider.GetInstance().GetMailTable(usernamelist);
if (dt.Rows.Count < 1)
{
return "";
}

Thread[] lThreads = new Thread[dt.Rows.Count];

int count = 0;
int percount = 5;
StringBuilder result = new StringBuilder();

int successfulCount = 0;
foreach (DataRow dr in dt.Rows)
{
if (successfulCount > 100)
break;
EmailMultiThread emt = new EmailMultiThread(dr["username"].ToString().Trim(), dr["email"].ToString().Trim(), subject, body);
lThreads[count] = new Thread(new ThreadStart(emt.Send));
lThreads[count].Start();

if (count >= percount)
{
Thread.Sleep(5000);
count = 0;
}
result.Append(dr["uid"].ToString());
result.Append(",");
successfulCount++;
count++;
}
return result.ToString().Trim().Remove(result.Length - 1);
}

/// <summary>
/// 用户邮件发送
/// </summary>
/// <param name="Email">email地址</param>
/// <param name="title">邮件的标题</param>
/// <param name="body">邮件内容</param>
/// <returns></returns>
public static bool DiscuzSmtpMailToUser(string Email, string title, string body)
{

try
{
ESM.AddRecipient(Email);

ESM.MailDomainPort = emailinfo.Port;
ESM.From = emailinfo.Sysemail;//设定发件人地址(必须填写)
ESM.FromName = configinfo.Webtitle;
ESM.Html = true;//设定正文是否HTML格式。
ESM.Subject = title;

ESM.Body = "<pre style=\"width:100%;word-wrap:break-word\">" + body.ToString() + "</pre>";
ESM.MailDomain = emailinfo.Smtp;//"mail.discuz.com";//"smtp.163.com";
//也可将将SMTP信息一次设置完成。写成
ESM.MailServerUserName = emailinfo.Username;
ESM.MailServerPassWord = emailinfo.Password;

//开始发送
return ESM.Send();
}
catch
{
return false;
}
}

}

//多线程发送邮箱类
public class EmailMultiThread : Emails
{

private string m_username = "";

private string m_email = "";

private string m_title = "";

private string m_body = "";

private bool m_issuccess = false;

public string UserName
{
get { return m_username; }
}

public string Email
{
get { return m_email; }
}

public string Title
{
get { return m_title; }
}

public string Body
{
get { return m_body; }
}

public bool IsSuccess
{
get { return m_issuccess; }
set { m_issuccess = value; }
}

public EmailMultiThread(string UserName, string Email, string Title, string Body)
{
m_username = UserName;
m_email = Email;
m_title = Title;
m_body = Body;
}

public void Send()
{
lock (emailinfo)
{
try
{
ESM.MailDomainPort = emailinfo.Port;
ESM.AddRecipient(this.Email);
ESM.RecipientName = this.UserName;//设定收件人姓名

ESM.From = emailinfo.Sysemail;
ESM.FromName = configinfo.Webtitle;
ESM.Html = true;
ESM.Subject = this.Title;
ESM.Body = "<pre style=\"width:100%;word-wrap:break-word\">" + this.Body.ToString() + "</pre>";
ESM.MailDomain = emailinfo.Smtp;
ESM.MailServerUserName = emailinfo.Username;
ESM.MailServerPassWord = emailinfo.Password;

//开始发送
this.IsSuccess = ESM.Send();

}
catch
{ }

}
Thread.CurrentThread.Abort();
}
}

Answer 2

确保你的主机安装了smtp服务，并在你的程序中引用了System.web然后调用下面的方法：

//此方法同时适用于Windows App与Web App

using System.Security.Permissions;
using System.Web.Mail;

[PermissionSet(SecurityAction.LinkDemand, Unrestricted=true)]
private void Send()
{
MailMessage message1;

message1.From = "abc@gmail.com"
message1.To = "def@microsoft.com";

message1.BodyFormat = MailFormat.Html;
message1.Body = "This is body text";

System.Web.Mail.SmtpMail.Send(message1);
}

Answer 3

private void toolStripButton1_Click(object sender, EventArgs e)
{
//发送过程

if (this.textBox1.Text.Length < 1 | this.textBox2.Text.Length< 1 | this.textBox3.Text.Length < 1)
{
MessageBox.Show("必须填写收件人地址，发件人地址和内容", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}

MailMessage MyMessage = new MailMessage();

MyMessage.Priority = MailPriority.Normal;
if (this.radioButton1.Checked)
MyMessage.Priority = MailPriority.High;
if (this.radioButton3.Checked)
MyMessage.Priority = MailPriority.Low;

MyMessage.IsBodyHtml = false;
if (this.hTML格式ToolStripMenuItem.Checked)
MyMessage.IsBodyHtml = true;

string[] mailTo = this.textBox1.Text.Split(',');
for (int i = 0; i < mailTo.Length; i++)
MyMessage.To.Add(mailTo[i]);

MyMessage.From = new MailAddress(this.textBox2.Text);

MyMessage.Subject = this.textBox3.Text;

if (this.hTML格式ToolStripMenuItem.Checked)
{
MyMessage.Body = this.richTextBox1.Text;
}
else
{
MyMessage.Body = this.textBox4.Text; ;
}

MyMessage.BodyEncoding = System.Text.Encoding.UTF8;

for (int i = 0; i < listView1.Items.Count; i++)
{
Attachment MyAttach = new Attachment(listView1.Items[i].Tag.ToString());
MyMessage.Attachments.Add(MyAttach);
}

DataProcess dp = new DataProcess();
dp.SqlString = "select account,password,smtp from mailUser where email = '" + textBox2.Text.Trim()+"'";
DataTable dt = dp.find();
string smtpserver = dt.Rows[0].ItemArray[2].ToString() ;
string myAccount = dt.Rows[0].ItemArray[0].ToString();
string myPassword = dt.Rows[0].ItemArray[1].ToString();

try
{
SmtpClient smtpclient = new SmtpClient(smtpserver,25);
smtpclient.Credentials = new NetworkCredential(myAccount,myPassword);
smtpclient.Send(MyMessage);

//把已发送邮件存入邮箱
string time = DateTime.Now.ToString();
string att = "";
for (int i = 0; i < listView1.Items.Count; i++)
{
att = att + listView1.Items[i].Tag.ToString() + ",";
}
string body = "";
if (this.hTML格式ToolStripMenuItem.Checked)
{
body = this.richTextBox1.Text;
}
else
{
body = this.textBox4.Text; ;
}

dp.SqlString = String.Format("insert into [mailSend]([from],[to],[subject],[body],[time],[att]) values('{0}','{1}','{2}','{3}','{4}','{5}')",
textBox2.Text.Trim(), textBox1.Text.Trim(), textBox3.Text.Trim(), body, time, att);

dp.execute();

//检查草稿箱，如果有已发送相关邮件，则删除
dp.SqlString = "select * from mailDraft where id = " + flag.ToString();
dt = dp.find();
if (dt.Rows.Count == 1)
{
dp.SqlString = "delete from mailDraft where id = " + flag.ToString();
dp.execute();
}

MessageBox.Show("邮件发送成功！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

}
catch (Exception Err)
{
MessageBox.Show(Err.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}