Exchange Web服务筹集例外：您必须加载或分配此属性，然后才能阅读其值；发送电子邮件时

Question

当前正在实施使用Exchange Web服务和C＃发送回复电子邮件的代码。在调试同样的情况下，我遇到了这个例外。

#exception

Microsoft.Exchange.WebServices.Data.ServiceObjectPropertyException
  HResult=0x80131500
  Message=You must load or assign this property before you can read its value.
  Source=Microsoft.Exchange.WebServices
  StackTrace:
   at Microsoft.Exchange.WebServices.Data.PropertyBag.get_Item(PropertyDefinition propertyDefinition)
   at Microsoft.Exchange.WebServices.Data.Item.get_Body()
   at DataLoadLibrary.DataLoad.Email.TestPortRequestOauthBased.startDataload() in C:\Users\aadityaradhakrishnan\Development\IPACT\ROB\ipact-rob\DataLoadLibrary\DataLoad\Email\TestPortRequestOauthBased.cs:line 113
   at TestPortEmailReader.Program.<Main>d__8.MoveNext() in C:\Path\TestPortEmailReader\Program.cs:line 87

  This exception was originally thrown at this call stack:
    [External Code]
    DataLoadLibrary.DataLoad.Email.TestPortRequestOauthBased.startDataload() in TestPortRequestOauthBased.cs
    TestPortEmailReader.Program.Main(string[]) in Program.cs

#implementation

public bool genericEmail(
                                string recepient,
                                string subject,
                                string bodyMessage,
                                Dictionary<string, string> replacementStrings = null,
                                string cc = "",
                                string bcc = "",
                                string headerMessage = "",
                                string footerMessage = "",
                                FileInfo[] attachments = null,
                                string[] filenames = null,
                                EmailMessage originalEmail = null,
                                ExchangeService exchangeClient = null)
        {

            EmailMessage email = new EmailMessage(exchangeClient);
            email.Sender.Address= config.exchangeUsername + "@domain.com";
            email.Sender.Name = "ABC";
            if (recepient.Length == 0) {
                email.ToRecipients.Add(ABCTeamEmail);
            }
            else
            {
                email.ToRecipients.Add(recepient.TrimEnd(';'));
            }
            if (cc.Length != 0)
                email.CcRecipients.Add(cc.TrimEnd(';'));
            if (config.environment != "PR")
            {
                email.Sender.Address = config.exchangeUsername + "@domain.com";
                email.CcRecipients.Add(null); 
            }

            if (attachments != null)
            {
                int i = 0;
                foreach (FileInfo fi in attachments)
                {
                    FileStream theStream = new FileStream(fi.FullName, FileMode.OpenOrCreate);
                    if (filenames == null)
                        email.Attachments.AddFileAttachment(fi.Name, theStream);
                    else
                        email.Attachments.AddFileAttachment(filenames[i], theStream);
                    i++;
                }
            }

            if (originalEmail != null)
            {
                string originalEmailFilename = config.extractFolder + "\\Emails" + originalEmail.Subject.Trim().Replace('\\', '_').Replace('/', '_').Replace(":", "_").Replace("\"", "_").Replace("*", "_").Replace("?", "_").Replace("<", "_").Replace(">", "_").Replace("|", "_") + "_" + originalEmail.DateTimeReceived.ToString("yyyyMMdd_HHmmss") + ".msg";
                originalEmail.Save(originalEmailFilename);
                email.Attachments.AddFileAttachment(originalEmailFilename);
                
            }

            if (config.environment == "PR")
                email.Subject = subject.Trim();
            else
                email.Subject = "[" + config.environment + "] " + subject.Trim();

            if (replacementStrings != null)
            {
                foreach (KeyValuePair<string, string> kv in replacementStrings)
                {
                    bodyMessage = bodyMessage.Replace(kv.Key, kv.Value);
                }
            }

            bodyMessage = bodyMessage.Replace("{headerMessage}", headerMessage);
            bodyMessage = bodyMessage.Replace("{footerMessage}", footerMessage);
            email.Body = new MessageBody(bodyMessage);
            email.Send();
                return true;
        }
    }

ews_oauth_adapter.genericEmail(respondTo, "RE: " + msgDetail.Subject.ToString() + " Incorrect Physical Name", physcalNameErrorMessage + BottomOfEmail + "<br><br><hr><br>" + msgDetail.Body, null, cc, "", "", "", null, null, null, exchclient);

**调用函数通用邮件时获得异常**

无法准确识别我的实现问题。经历了一些类似的问题，例如发送电子邮件时错误：您必须加载或分配此属性，然后才能读取其值-EWS 。但是在我的实施中找不到相同的问题。

＃更新

 try
                {
                    inbox_mails = tokenProvider.ReadEmailFromFolder(-5, 50, Inbox_ID.Id);
                    foreach (Item mailItem in inbox_mails)
                    {

                        EmailMessage mes = (EmailMessage)mailItem;
                        Console.WriteLine("\nRunning message: " + mailItem.Subject.ToString() + " From: " + mes.From.ToString());
                        logger.log("\nRunning message: " + mailItem.Subject.ToString() + " From: " + mes.From.ToString());
                        Console.WriteLine(mes.Body); // Showing the exception when trying to print the Mail Body.


                        //TestPortRequestOauthBased dataloader = new TestPortRequestOauthBased(config, logger, dbCommands, exchClient, mailItem);
                       

                    }

                        Thread.Sleep(sleepInterval);
                }
                catch(Exception e)
                {
                    Console.WriteLine("The operation timed out!! ");
                    Console.WriteLine(e.Message);
                    Console.WriteLine(e.StackTrace);
                    //ews_oauth_adapter.genericEmail(cc, "FATAL ERROR: Integration TestPort System", "System has crashed and needs to be restarted <br><br>" + e.Message + "<br>" + e.StackTrace, null, "", null, "", "", null, null, null);
                    throw e;
                }

 public FindItemsResults<Item> ReadEmailFromFolder(int mailSince, int mailLimt,  FolderId folder_id)
        {
            TimeSpan ts = new TimeSpan(mailSince, 0, 0, 0);
            DateTime date = DateTime.Now.Add(ts);
            SearchFilter.IsGreaterThanOrEqualTo filter = new SearchFilter.IsGreaterThanOrEqualTo(ItemSchema.DateTimeReceived, date);
            var findResults = exchangeService.FindItems(folder_id, filter, new ItemView(mailLimt));
            return findResults;
        }

Answer 1

该错误告诉您您试图加载从EWS要求的属性。当您调用该函数时，您将具有

msgdetail.body。

从哪里获得sgdetail的代码，您很可能从未要求您在此代码中返回消息的正文，并且默认情况下findItems中的efterems not n of sosgdeail so msgdeail so默认情况下不会返回。某个时候应该有负载