Windows服务的OpenPop退出GetMessage代码，相同的代码OK赢的应用程序

Question

我们正在使用

实现下载Gmail A.C附件的代码

openpop3名称空间。在此代码中，如果附件

，我们将检查附件大小。

size大于指定值(配置文件中以kb为单位设置的值)。然后是

发送电子邮件到发件人....它在windows应用程序中工作得很好，但每当我执行代码

时

在windows服务中遇到问题。它从这行代码退出函数

OpenPop.Mime.Message m = popClient.GetMessage(i);

框架:3.5vs: 2008语言#打开POP命名空间V2.0.4.369

This is my code
 OpenPop.Mime.Message m = popClient.GetMessage(i);

private void ReceiveMails()
    {
            Utility.Log = true;
            if (popClient.Connected)
            {
                popClient.Disconnect();
            }
            popClient.Connect(POPServer, port, ssl);
            popClient.Authenticate(username, password);
            int Count = popClient.GetMessageCount();
            writeToLogFile("Total Mail count is:" + Count.ToString());
            if (Count > 0)
            {
                for (int i = 1; i <= Count; i++)
                {
                    flag = false;
                    OpenPop.Mime.Message m = popClient.GetMessage(i);
                    Sub = m.Headers.Subject;
                   int size = popClient.GetMessageSize(i);
                    int mailsize = int.Parse(ConfigurationSettings.AppSettings
["emailSize"]) * 1024;

                    if (size < mailsize)
                    {
                    //we are checking the sub of Email
                    for (int j = 1; j < 30; j++)
                    {
                        strFranchisekey = ConfigurationSettings.AppSettings
["Franchise" + j];
                        if (strFranchisekey != "")
                        {
                            int inex = strFranchisekey.IndexOf("=");
                            strFranchiseshortvalue = strFranchisekey.Substring
(0, inex);
                            if (Sub.Contains(strFranchiseshortvalue))
                            {
                                flag = true;
                                foreach (OpenPop.Mime.MessagePart attachment in 
m.FindAllAttachments())
                                {
                                    writeToLogFile(attachment.FileName);
                                    file = attachment.FileName;
                                    index = strFranchisekey.IndexOf("=");
                                    string StrCity = strFranchisekey.Substring
(index + 1);
                                    strFolderPath = 
(ConfigurationSettings.AppSettings["FolderPath" +StrCity]);
                                    StrSubFolderPath = 
(ConfigurationSettings.AppSettings["SubPath" + StrCity]);
                                    if (Directory.Exists(strFolderPath))
                                    //we are checking folder exists or not ?
                                    {
                                        File.WriteAllBytes(strFolderPath + "\" 
+ file, attachment.Body);
                                    }
                                    //
                                    else if (Directory.Exists
(StrSubFolderPath))
                                    {
                                        File.WriteAllBytes(StrSubFolderPath + 
"\" + file, attachment.Body);
                                    }
                                    else
                                    {
                                        //we can give here invalid path.
                                        File.WriteAllBytes
(ConfigurationSettings.AppSettings["InvalidPath"] + "\" + file, attachment.Body);
                                        sendEmail(i);
                                    }
                                }
                                break;
                            }
                        }
                    }
                    if (flag != true)
                    {
                        writeToLogFile("matching franchise name is not found");
                        foreach (OpenPop.Mime.MessagePart attachment in 
m.FindAllAttachments())
                        {
                            File.WriteAllBytes
(ConfigurationSettings.AppSettings["InvalidPath"] + "\" + file, attachment.Body);
                        }
                        sendEmail(i);
                    }
                }
             }
    else
  {
     writeToLogFile("Please reduce the  email size");
   }
            }
            else
            {
                writeToLogFile("No New Attachment");
            }

        }

Answer 1

谢谢@Antonio Bakula我在我的windows服务应用程序中编写了try catch块并记录了它。然后我明白了我的错误，它给出了异常，无法读取消息，另一个实例已经在读取。这是因为代码是基于计时器的，并且

每隔1分钟触发一次事件。现在我添加了代码来停止定时器一旦它开始处理电子邮件和启动定时器一旦它完成电子邮件处理代码。