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ASP.NET发送邮件

2024-08-09 18:23:53   219人阅读

 

在ASP.NET中实现发送邮件的功能，包括发送附近、HTML页面、图片，并且可以有多个发送对象。

在实际使用中用到队列、线程的技术，目的是防止发送邮件的过程阻碍主网站程序的运行。

具体代码如下：

public bool SendEmail(out string message)        {            string str3;            bool flag = false;            message = string.Empty;            this.MailMM.Priority = MailPriority.Normal;            this.MailMM.BodyEncoding = Encoding.UTF8;            this.MailMM.IsBodyHtml = this.IsBodyHtml;
 
 
 
　　
            
            //关于图片
            AlternateView htmlView = null;            try            {                htmlView = AlternateView.CreateAlternateViewFromString(StrMailContent,null, "text/html");                                for (int i = 0; i < aboImgSrcList.Count; i++)                {                    try                    {                        LinkedResource logo = new LinkedResource(aboImgSrcList[i], "image/jpeg");                        logo.ContentId = "imgSrc" + (i + 1);                        htmlView.LinkedResources.Add(logo);                    }                    catch (Exception EX)                    {                    }                }                MailMM.AlternateViews.Add(htmlView);
                //关于附件　　　　　　　　　　                
                for (int i = 0; i < this.AttachmentsList.Count; i++)                {                    string tempStr = this.AttachmentsList[i].ToString();                    Attachment attach = new Attachment(tempStr);                    this.MailMM.Attachments.Add(attach);                }
            }            catch (Exception)            {                            }            int count = 0;            foreach (string str in this.arrMailTo.Keys)            {                try                {this.MailMM.To.Add(new MailAddress(this.arrMailTo[str]));                    if (this.StrMailTitle != "")                    {                        this.MailMM.Subject = this.StrMailTitle;                    }                    this.MailMM.SubjectEncoding = Encoding.UTF8;                    if (this.MailMM.From == null)                    {                        this.MailMM.From = new MailAddress(this.StrSender, (this.StrSenderDesc == "") ? this.StrSender : this.StrSenderDesc, Encoding.UTF8);                    }                    SmtpClient client = new SmtpClient                    {                        DeliveryMethod = SmtpDeliveryMethod.Network,                        EnableSsl = false,                        Host = this.MailServer,                        Port = int.Parse(this.SmtpPort),                        Credentials = new NetworkCredential(this.StrSenderUser, this.StrSenderUserPass)                    };                    client.Send(this.MailMM);                    MailMM.To.Clear();                    flag = true;                    count++;                }                catch (SmtpException exception)                {                    flag = false;                    message +="("+count+") "+DateTime.Now.ToString()+"  "+ this.arrMailTo[str] + ": " + exception.Message + ";\r\n";                }                catch (InvalidCastException exc)                {                    flag = false;                    message += "(" + count + ") " + DateTime.Now.ToString() + "  " + this.arrMailTo[str] + ": " + exc.Message + ";\r\n";                }                catch (Exception ex)                {                    flag = false;                    message += "(" + count + ") " + DateTime.Now.ToString() + "  " + this.arrMailTo[str] + ": " + ex.Message + ";\r\n";                }            }            return flag;        }

然后在global文件中Application_Start的方法内开启一下线程池，用于遍历邮箱的队列，如果队列中有要发的邮件，则自动调用发送邮件的代码进行邮件发送。

代码如下：

 

技术分享
 1 protected void Application_Start(object sender, EventArgs e) 2         { 3             string basePath = AppDomain.CurrentDomain.BaseDirectory; 4             //step 2: start a thread to scan email queue(send email) 5             ThreadPool.QueueUserWorkItem((o) => 6             { 7                 while (true) 8                 { 9                     try10                     {11                         if (EmailHelper.mailQueueLR.Count > 0)12                         {13                             lock (this)14                             {15                                 if (EmailHelper.mailQueueLR.Count > 0)16                                 {17                                     int tempInt = EmailHelper.mailQueueLR.Dequeue();18                                     if (tempInt == null || tempInt == 0)19                                     {20                                     }21                                     else22                                     {23                                       //此处为创建一个邮件的具体代码，根据实际情况编写24                                      }25                                         catch (Exception ex)26                                         {27                                             //this.AddMsg(exception.Message);28                                             string str = ex.Message;29                                             str = str + "str";30 31                                         }32                                     }33                                 }34                             }35                         }36                         else37                         {38                             Thread.Sleep(1000);39                         }40                     }41                     catch (InvalidOperationException ioex)42                     {43                         continue;44                     }45                     catch (Exception ex)46                     {47                         continue;48                     }49 50                 }51             }, basePath);52         }
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 实际开发中遇到的问题

1：在Ipad或者iphone设备中出现了，接收到的邮件只显示源代码的情况。

     原因：在发送邮件时，实际是发送了两份，一份源代码，一份可选内容，而在ipad中却只显示了源代码

    解决方法：把所有的HTML代码都放到可变视图（AlternateViews）中去，不再放到body里面，

2：在邮件显示时，出现了乱码的情况。

    原因：邮件内容编码格式不统一，例如：正文内容跟标题编码格式不统一

    解决方法：统一编码格式，所有字符串都转换成utf7编码格式

 

ASP.NET发送邮件


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