net2.0後，C#可以利用System.Net發送郵件了。
代碼整理如下：
/**************************************
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* CLR版本：4.0.30319.17929
*
*
*
*
* 修改時間：2014-02-20 11:20
*
**************************************/
using System;
using System.Text;
using System.Net;
using System.Net.Mail;
using System.Net.Mime;
namespace LeeStudio.Basic
{
/// <summary>
/// 郵件發送類
/// </summary>
public class SendEmail
{
private MailMessage mailMessage = new MailMessage(); //實例化一個郵件類
#region 構造函數
/// <summary>
/// 構造函數
/// </summary>
/// <param name="toAddresses">收件人地址（多個以,號分開）</param>
/// <param name="fromAddress">發件人地址</param>
/// <param name="title">主題</param>
/// <param name="body">正文</param>
public SendEmail(string toAddresses, string fromAddress, string title, string body)
: this(toAddresses, fromAddress, "", "", title, body, false)
{
}
/// <summary>
/// 構造函數
/// </summary>
/// <param name="toAddress">收件人地址</param>
/// <param name="fromAddress">發件人地址</param>
/// <param name="toName">收件人名字</param>
/// <param name="fromName">發件人姓名</param>
/// <param name="title">主題</param>
/// <param name="body">正文</param>
/// <param name="isBodyHtml">正文是否為html格式</param>
public SendEmail(string toAddress, string fromAddress, string toName, string fromName, string title, string body, bool isBodyHtml)
{
mailMessage.From = new MailAddress(fromAddress, fromName, Encoding.GetEncoding(936));
if (toName.Equals(""))
mailMessage.To.Add(toAddress);
else
mailMessage.To.Add(new MailAddress(toAddress, toName, Encoding.GetEncoding(936)));
mailMessage.Subject = title;
mailMessage.SubjectEncoding = Encoding.GetEncoding(936);
mailMessage.Body = body;
mailMessage.IsBodyHtml = isBodyHtml;
mailMessage.BodyEncoding = Encoding.GetEncoding(936);
}
#endregion
/// <summary>
/// 設置SMTP，並且將郵件發送出去
/// 所有參數都設置完成後再調用該方法
/// </summary>
/// <param name="password">發件人密碼</param>
/// <param name="smtpHost">SMTP服務器地址</param>
public void SetSmtp(string password, string smtpHost)
{
SetSmtp(mailMessage.From.Address, password, smtpHost, 25, false, MailPriority.Normal);
}
/// <summary>
/// 設置SMTP，並且將郵件發送出去
/// 所有參數都設置完成後再調用該方法
/// </summary>
/// <param name="address">發件人地址（必須為真實有效的email地址）</param>
/// <param name="password">發件人密碼</param>
/// <param name="smtpHost">SMTP服務器地址</param>
/// <param name="smtpPort">SMTP服務器的端口</param>
/// <param name="isEnableSsl">SMTP服務器是否啟用SSL加密</param>
/// <param name="priority">郵件的優先級</param>
public void SetSmtp(string address, string password, string smtpHost, int smtpPort, bool isEnableSsl, MailPriority priority)
{
SmtpClient smtp = new SmtpClient();
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Credentials = new NetworkCredential(address, password);
smtp.Host = smtpHost;
smtp.Port = smtpPort;
smtp.EnableSsl = isEnableSsl;
mailMessage.Priority = priority;
smtp.Send(mailMessage); //發送郵件
}
#region //設置郵件地址
/// <summary>
/// 設置更多收件人
/// </summary>
/// <param name="toAddresses">收件人地址</param>
public void SetMoreToAddress(string toAddresses)
{
mailMessage.To.Add(toAddresses);
}
/// <summary>
/// 設置更多收件人
/// </summary>
/// <param name="toAddresses">收件人地址</param>
/// <param name="toName">收件人名字</param>
public void SetMoreToAddress(string toAddress, string toName)
{
mailMessage.To.Add(new MailAddress(toAddress, toName, Encoding.GetEncoding(936)));
}
/// <summary>
/// 設置抄送者（多個以,號分開）
/// </summary>
/// <param name="ccAddresses">抄送者地址</param>
public void SetCarbonCopyFor(string ccAddresses)
{
mailMessage.CC.Add(ccAddresses);
}
/// <summary>
/// 設置抄送者
/// </summary>
/// <param name="ccAddress">抄送者地址</param>
/// <param name="ccName">抄送者名字</param>
public void SetCarbonCopyFor(string ccAddress, string ccName)
{
mailMessage.Bcc.Add(new MailAddress(ccAddress, ccName, Encoding.GetEncoding(936)));
}
/// <summary>
/// 設置密送者（多個以,號分開）
/// </summary>
/// <param name="bccAddresses">密送者</param>
public void SetBlindCarbonCopyFor(string bccAddresses)
{
mailMessage.Bcc.Add(bccAddresses);
}
/// <summary>
/// 設置密送者
/// </summary>
/// <param name="bccAddress">密送者</param>
/// <param name="bccName">密送者名字</param>
public void SetBlindCarbonCopyFor(string bccAddress, string bccName)
{
mailMessage.Bcc.Add(new MailAddress(bccAddress, bccName, Encoding.GetEncoding(936)));
}
#endregion
#region 添加附件
/// <summary>
/// 添加附件（自動識別文件類型）
/// </summary>
/// <param name="fileName">單個文件的路徑</param>
public void Attachments(string fileName)
{
mailMessage.Attachments.Add(new Attachment(fileName));
}
/// <summary>
/// 添加附件（默認為富文本RTF格式）
/// </summary>
/// <param name="fileName">單個文件的路徑</param>
public void AttachmentsForRTF(string fileName)
{
mailMessage.Attachments.Add(new Attachment(fileName, MediaTypeNames.Application.Rtf));
}
#endregion
}
}
調用是按照需求，自由設置參數。
using LeeStudio.Basic;
private void SendEmail()
{
#region 最簡設置
//SendEmail se = new SendEmail("*****@****.com", "****@163.com", "title", "body");
//se.SetSmtp("password", "smtp.163.com"); //必須在所有參數設置完後調用此方法
#endregion
#region 完全設置
//string toAddresses = "***@**.**,***@**.**";
//string toNames = "frank,lee";
//SendEmail se = new SendEmail("to@**.**", "from@**.**", "toname", "fromname","title", "body", false);
//se.SetMoreToAddress("to@**.**", "toName");
//se.SetCarbonCopyFor("cc@**.**");
//se.SetBlindCarbonCopyFor("bcc@**.**");
//string filePath = Request.PhysicalApplicationPath + "/file/SendEmail.txt";
//se.Attachments(filePath);
//filePath = Request.PhysicalApplicationPath + "/file/RTF文件.docx";
//se.AttachmentsForRTF(filePath);
//se.SetSmtp("email", "password", "smtp", 25, true, System.Net.Mail.MailPriority.Normal); //必須在所有參數設置完後調用此方法
#endregion
}
遺留問題：
當有多個收件人/抄送者/密送者時，如何快速處理？之前的做法是讓用戶輸入字符串，再將字符串一一對應匹配，代碼如下：
/// <summary>
/// 將郵件地址和名稱加入到鋸齒數組中
/// </summary>
/// <param name="addrs">郵件地址（多個以,號分開）</param>
/// <param name="names">名稱（多個以,號分開）</param>
/// <returns>地址和名稱數組</returns>
private string[][] SetNameList(string addrs, string names)
{
string[][] result = new string[2][];
string[] addr = addrs.Split(',');
string[] name = names.Split(',');
result[0] = new string[addr.Length];
result[1] = new string[name.Length];
for (int i = 0; i < addr.Length; i++)
result[0][i] = addr[i];
for (int i = 0; i < name.Length; i++)
result[1][i] = name[i];
return result;
}
首先這個方法就很奇葩，其次，只要用戶輸入的個數不對應，又要做一堆的異常處理。
