关于.NET邮件的收发问题总结

            string SendTos=SendTo.Text.Trim();　　//发送人
            string CcTos=CcTo.Text.Trim();  　　  //抄送人
            string[] Receiver=System.Text.RegularExpressions.Regex.Split(SendTos+CcTos,",");  //总收件人
            string FromMail="ustbwuyi1@163.com";//发件人
            string Title="你好"; //邮件主题
            string Body="附件里重要文档,请查收!";   //邮件主体
            string ShowName="ustbwuyi";//显示名字

            if(SendTos!="" || CcTos!="")
            ...{
                //用户名(取发送邮箱的@前面的部分,即ustbwuyi1
                string MailUserName=FromMail.Substring(0,FromMail.IndexOf("@"));

                //密码
                string MailPassword="ustbwuyi";
                System.Web.Mail.MailMessage mailmessage=new MailMessage();
                mailmessage.From=FromMail;
                mailmessage.Subject=Title;
                mailmessage.Body=Body;

                //添加附件

                ArrayList FileNames;
                //如果存在附件
                if(FileNames.Count>=1)
                ...{                    
                    //添加附件
                        string Filename;
                        for(int k=0;k<FileNames.Count;k++)
                        ...{                            
                            Filename=FileNames[k].ToString();
                            mailmessage.Attachments.Add(new MailAttachment(Filename));                        
                        }            
                    }
                }
                mailmessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate",1);
                mailmessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername",MailUserName);
                mailmessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword",MailPassword);

                
            //向收件人和抄送人循环发送
                for(int j=0;j<Receiver.Length;j++)
                ...{
                    mailmessage.To=Receiver[j].ToString();
                    System.Web.Mail.SmtpMail.SmtpServer="smtp.163.com";
                    try
                    ...{
                        System.Web.Mail.SmtpMail.Send(mailmessage);
                    }
                    catch(Exception ex)
                    ...{        
                        Response.Write("<script language='javascript'>alert('邮件发送失败,请您和ustbwuyi联系(QQ:108556024)！')</script>");
                    }
                }
            }

jmail.MessageClass MyMail = new jmail.MessageClass();

            string SendTos=SendTo.Text.Trim();　　//发送人
            string CcTos=CcTo.Text.Trim();  　　  //抄送人
            string[] Receiver=System.Text.RegularExpressions.Regex.Split(SendTos+CcTos,",");  //总收件人
            string FromMail="ustbwuyi1@163.com";//发件人
            string Title="你好"; //邮件主题
            string Body="附件里是重要文档,请查收!";   //邮件主体
            string ShowName="ustbwuyi";//显示名字
            //取email的@前面部分为用户名,即ustbwuyi1,当然也可以自己设置.
            string MailUserName=FromMail.Substring(0,FromMail.IndexOf("@"));
            string MailPassword="ustbwuyi";
            if(SendTos!="" || CcTos!="")
            ...{

                // 字符集
                MyMail.Charset = "GB2312";
                //附件的编码格式
                MyMail.Encoding = "BASE64";
                /**//**//**/////是否将信头编码成iso-8859-1字符集
                     MyMail.ISOEncodeHeaders = false;
                //发送人邮件地址
                MyMail.From = FromMail;
                //发送人姓名
                MyMail.FromName = ShowName;
                // 邮件主题
                MyMail.Subject =Title;
                     //身份验证的用户名
                MyMail.MailServerUserName = MailUserName;
                //用户密码
                MyMail.MailServerPassWord = MailPassword;
                     //邮件内容
                MyMail.Body = Body;
                ArrayList FileNames;
                    //如果存在附件
                    if(FileNames.Count>=1)
                    ...{
                        //添加附件
                        string Filename;
                        for(int k=0;k<FileNames.Count;k++)
                        ...{
                            Filename=FileNames[k].ToString();
                            MyMail.AddAttachment(Filename,false,HttpUtility.UrlDecode(Filename.Substring(Filename.LastIndexOf(".")+1,3)));
                        }            
                    }

                try
                ...{
                    //循环发送
                    for(int i=0;i<Receiver.Length;i++)
                    ...{
                        MyMail.AddRecipient(Receiver[i],"","");
                        MyMail.Send("Mail.rshi.cn",false);
                    }
                
            
                }
                catch(Exception ex)
                ...{
                Response.Write("<script language='javascript'>alert('邮件发送失败,请您和ustbwuyi联系(QQ:108556024)！')</script>");

                }
            }

    public void ReceiveMails(string Username)
        ...{
            
            jmail.Message Msg=new jmail.Message();
            jmail.POP3 jpop = new jmail.POP3();
            jmail.Attachments atts;
            jmail.Attachment att;
            
            //username为用户名,该方法通过用户名获取该用户的pop设置,即用户的POP用户名,密码,POP服务器地址以及端口号这四个参数,这四个参数是连接POP服务器的必用参数.
                SqlDataReader dataReader = this.ExtGetSetting(Username);
                if(dataReader.Read())
                ...{
                    if(dataReader["PopServer"].ToString()!=""&&dataReader["PopUsername"].ToString()!="")
                    ...{
                        //连接POP服务器
                        jpop.Connect(dataReader["PopUsername"].ToString(),dataReader["PopPassword"].ToString(),dataReader["PopServer"].ToString(),Int32.Parse(dataReader["PopPort"].ToString()));
                        //如果服务器上有邮件
                        if(jpop.Count>=1)
                        ...{
                         for(int i=1;i<=jpop.Count;i++)
                            ...{
                            
                                Msg = jpop.Messages[i];
                                atts=Msg.Attachments;

                             //取数据库中邮件信息中的最大发送时间,即最近接收到的一封邮件的时间
                                Database dbase=new Database();
                                DataTable data=dbase.GetDataTable("select max(MailSendDate) as MailSenderDate from TabMailList where MailTypeFlag='1'");
                                
                             //对服务器上的邮件的发送时间和数据库最近一封邮件的时间进行比较,如果大那么证明该邮件还未被收取,是一封新邮件,这样避免重复收取邮件入库
                                if(Msg.Date>Convert.ToDateTime(data.Rows[0][0].ToString()))

                                ...{
                                    //将这封新邮件的信息保存到数据库
                                    this.SaveExtMail(Msg,Username,dataReader["Email"].ToString(),jpop.GetMessageUID(i));
                            
                                    //获取附件上传到服务器并且将信息存入数据库
                                    if(atts.Count>=1)
                                    ...{
                                        for(int k=0;k<atts.Count;k++)
                                        ...{

                                            att=atts[k];//获得附件

                                            string attname=att.Name;
                                            try
                                            ...{

                                                Random TempNameInt    = new Random(); 
                                                string NewMailDirName  = TempNameInt.Next(100000000).ToString();
                                                Directory.CreateDirectory(System.Web.HttpContext.Current.Server.MapPath(".")+"\AttachFiles\"+Username+"\"+NewMailDirName);
                
                                                string mailPath="\AttachFiles\"+Username+"\"+NewMailDirName+"\"+attname;
            
                                                att.SaveToFile(System.Web.HttpContext.Current.Server.MapPath(".")+mailPath); 
                                                
                                                //获取该封邮件在数据库的ID,以便和附件信息相对应,取邮件表中的最大ID即可 
                                                int mailID=this.GetMailID();
                                               //将附件信息存入数据库
                                                this.AttExtSend(mailID,attname,att.Size,mailPath,Msg.From);
                                            }
                                            catch(Exception ex)
                                            ...{
                                                throw new Exception(ex.Message);
                                            }
                                        
                                        }
                                    }                                        
                                }                            
                            }                        
                        }    

                        //删除服务器上的邮件
                        jpop.DeleteMessages();
                        //断开连接    
                        jpop.Disconnect();
                    }
                
            }
        }