如何從EWS獲取電子郵件時獲取MimeContent？

Question

我在我的應用程序中使用EWS服務。在我想要獲取現有電子郵件，然後將其轉換爲文件。我爲此使用以下代碼。

private ExchangeService _service = null; 

internal EWSClient() 
{ 
    _service = new ExchangeService(ExchangeVersion.Exchange2010_SP1); 
    _service.Credentials = new WebCredentials(HandlerSettings.MailReceiverLogin, HandlerSettings.MailReceiverPassword); 
    _service.Url = new Uri(HandlerSettings.MailReceiverServer); 
} 

取電子郵件我使用綁定方法。

var completeEmailMessage = EmailMessage.Bind(_service, emailId); 
var mimeContent = completeEmailMessage.MimeContent; 
string tempFile = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString() + ".eml"); 
using (var fileStream = new FileStream(tempFile, FileMode.Create)) 
{ 
     fileStream.Write(mimeContent.Content, 0, mimeContent.Content.Length); 
} 

在這裏，我得到異常completeEmailMessage.MimeContent;一片空白。

我應該使用哪種方法來獲取具有MimeContent的完整電子郵件？

Answer 1

您應該創建一個屬性集，並添加MIMEContent作爲屬性加載然後指定爲綁定如過載性能

 PropertySet psPropSet = new PropertySet(BasePropertySet.FirstClassProperties); 
     psPropSet.Add(ItemSchema.MimeContent); 
     var completeEmailMessage = EmailMessage.Bind(_service, emailId, psPropSet); 
     var mimeContent = completeEmailMessage.MimeContent; 
     string tempFile = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString() + ".eml"); 
     using (var fileStream = new FileStream(tempFile, FileMode.Create)) 
     { 
      fileStream.Write(mimeContent.Content, 0, mimeContent.Content.Length); 
     }