using System;
using System.Net.Mail;
using System.Text;
namespace IMELS
{
public class SendMail
{
public SendMail() { }
private string _to = string.Empty;
/// <summary>
/// 收件人地址，多个用“,”号隔开
/// </summary>
public string To
{
set { _to = value; }
}
private string _from = string.Empty;
/// <summary>
/// 发件人地址
/// </summary>
public string From
{
set { _from = value; }
}
private string _fromName = string.Empty;
/// <summary>
/// 发件人显示名称
/// </summary>
public string FromName
{
set { _fromName = value; }
}
private string _cc = string.Empty;
/// <summary>
/// 抄送，多个用“,”号隔开
/// </summary>
public string CC
{
set { _cc = value; }
}
private string _bcc = string.Empty;
/// <summary>
/// 密抄，多个用“,”号隔开
/// </summary>
public string BCC
{
set { _bcc = value; }
}
private string _charset = "GB2312";
/// <summary>
/// 邮件正文的编码
/// </summary>
public string Charset
{
set { _charset = value; }
}
private string _contentType = "html";
/// <summary>
/// 邮件格式(html or txt)
/// </summary>
public string ContentType
{
set { _contentType = value; }
}
private string _subject = string.Empty;
/// <summary>
/// 邮件标题
/// </summary>
public string Subject
{
set { _subject = value; }
}
private string _body = string.Empty;
/// <summary>
/// 邮件内容
/// </summary>
public string Body
{
set { _body = value; }
}
private string _smtp;
/// <summary>
/// SMTP服务器地址
/// </summary>
public string Smtp
{
set { _smtp = value; }
}
private string _username;
/// <summary>
/// SMTP用户名
/// </summary>
public string Username
{
set { _username = value; }
}
/// <summary>
/// SMTP密码
/// </summary>
private string _password;
public string Password
{
set { _password = value; }
}
private int _port = 25;
/// <summary>
/// SMTP商品
/// </summary>
public int Port
{
set { _port = value; }
}
/// <summary>
/// 发送
/// </summary>
public void Send()
{
MailAddress from = new MailAddress(_from, _fromName);
MailMessage message = new MailMessage();
message.From = from;
string[] toadd = _to.Split(',');
foreach (string _add in toadd)
{
try
{
message.To.Add(new MailAddress(_add));
}
catch(Exception e)
{
_error += "To Address Error : " + e.Message + "(" + _add + ");";
}
}
if (_cc != string.Empty)
{
string[] ccadd = _cc.Split(',');
foreach (string _add in ccadd)
{
try
{
message.CC.Add(new MailAddress(_add));
}
catch (Exception e)
{
_error += "CC Address Error : " + e.Message + "(" + _add + ");";
}
}
}
if (_bcc != string.Empty)
{
string[] bccadd = _bcc.Split(',');
foreach (string _add in bccadd)
{
try
{
message.Bcc.Add(new MailAddress(_add));
}
catch (Exception e)
{
_error += "BCC Address Error : " + e.Message + "(" + _add + ");";
}
}
}
message.Sender = from;
message.Subject = _subject;
message.Body = _body;
if (_contentType == "html" || _contentType == string.Empty)
{
message.IsBodyHtml = true;
}
else
{
message.IsBodyHtml = false;
}
message.BodyEncoding = Encoding.GetEncoding(_charset);
message.DeliveryNotificationOptions = DeliveryNotificationOptions.None;
SmtpClient __smtp = new SmtpClient();
__smtp.Host = _smtp;
__smtp.Port = _port;
__smtp.UseDefaultCredentials = false;
__smtp.Credentials = new System.Net.NetworkCredential(_username, _password);
__smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
try
{
__smtp.Send(message);
}
catch (SmtpException e)
{
_error += "SMTP Error:" + e.Message + ";";
}
}
private string _error = string.Empty;
/// <summary>
/// 返回错误信息
/// </summary>
public string Error
{
get { return _error; }
}
/// <summary>
/// 清空错误信息
/// </summary>
public void ClearErr()
{
_error = string.Empty;
}
}
}(鼠标移到代码上去，在代码的顶部会出现四个图标，第一个是查看源代码，第二个是复制代码，第三个是打印代码，第四个是帮助)说一下具体实现过程：
1、首先新建一个类库项目；打开项目属性页，在“应用程序”标签设置程序集名称为“IMELS”（当然，这个你可以设置为你喜欢的名字），输出类型为类库，如图：
点击“程序集信息”，勾选“使程序集COM可见”，如图：
2、“签名”标签，勾选“为程序签名”，如图：
然后“在选择强名称密钥文件”下拉列表中选择密钥文件，如果没有密钥文件，就选择“新建”，这里我选择新建，如图：
在“密钥文件名称”栏里输入密钥的名称，你可以选择为密钥添加密码保护它，我这里没有使用密码。
然后为项目添加一个类“SendMail ”，代码就如上了。
3、代码完成后，生成DLL文件，把DLL放到D：盘或别的什么盘，不过最好不要放在系统盘，然后就是注册了，注册C#写的DLL是不能用regsvr32的，要用C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\regasm.exe，格式为：regasm /codebase d:\DLL\IMELS.dll。(注意：这里的v4.0.30319是你dll开发的framework的版本，我使用Framework4.0开发的，所以这里选择4.0的注册版本)
这样DLL的编写和注册都已完成了，下面就是应用了，asp中调用方法如下：
<%
dim send
set send = Server.CreateObject("IMELS.SendMail")
send.From = "test@163.com"
send.FromName = "无问"
send.Smtp = "smtp.163.com"
send.Username = "用户名"
send.Password = "密码"
send.Subject = "asp调用C#编写的DLL发送邮件测试标题"
send.ContentType = "html"
send.Charset = "gb2312"
send.Body = "asp调用C#编写的DLL发送邮件测试正文"
send.To = "to@163.com"
send.CC = "抄送地址"
send.BCC = "密抄地址"
send.Send()
Response.Write(send.Error)
%>(鼠标移到代码上去，在代码的顶部会出现四个图标，第一个是查看源代码，第二个是复制代码，第三个是打印代码，第四个是帮助)转自:http://www.cnblogs.com/wlkjhxd/archive/2009/03/18/1415037.html