asp调用C#编写的DLL发送邮件

一直想写一个asp能用发送邮件的服务器组件，不过用VC太麻烦了，一直都没都手。

前两天看一篇文章，说是asp怎么调用C#写的DLL，一试之下，果然可以，大喜，这下用来写一个发送邮件的东东简单了吧。

呵呵，非常简单，一会就弄好了，不敢独享，先看代码：

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;
        }
    }
}

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regasm，格式为：regasm /codebase d:\DLL\IMELS.dll。

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 = "[e-mail]"
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 = "[e-mail]"
send.CC = "抄送地址"
send.BCC = "密抄地址"
send.Send()
Response.Write(send.Error)
%>

好了，大功告成！！