交換Web服務 - 發送帶附件的電子郵件

Question

我剛剛使用EWS（Exchange Web服務），我正在尋找一個演示如何發送帶附件的電子郵件的簡單示例。我搜索了一個例子，我找不到任何簡單明瞭的方法。我找到了關於如何發送電子郵件但不發送帶附件的電子郵件的示例。

有沒有人有他們會推薦的例子的鏈接？在這裏發佈一個例子也會起作用！

Answer 1

嗯，我終於明白了這一點。以下是一種方法，它將創建郵件消息，將其存儲爲草稿，添加附件併發送電子郵件。希望這可以幫助那些無法找到像我這樣的好例子的人。

在我的例子中，我只會發送excel文件，這就是爲什麼內容類型設置的原因。顯然，這可以改變爲支持任何類型的文件附件。

作爲參考，變量esb是類型爲ExchangeServiceBinding類型的變量。

編輯

我也應該注意到，在這個例子中，我沒有檢查從成功或失敗的交換行動響應類型。如果您想知道您的EWS呼叫是否真正起作用，那麼一定要檢查這一點。

public void SendEmail(string from, string to, string subject, string body, byte[] attachmentAsBytes, string attachmentName) 
     { 
      //Create an email message and initialize it with the from address, to address, subject and the body of the email. 
      MessageType email = new MessageType(); 

      email.ToRecipients = new EmailAddressType[1]; 
      email.ToRecipients[0] = new EmailAddressType(); 
      email.ToRecipients[0].EmailAddress = to; 

      email.From = new SingleRecipientType(); 
      email.From.Item = new EmailAddressType(); 
      email.From.Item.EmailAddress = from; 

      email.Subject = subject; 

      email.Body = new BodyType(); 
      email.Body.BodyType1 = BodyTypeType.Text; 
      email.Body.Value = body; 

      //Save the created email to the drafts folder so that we can attach a file to it. 
      CreateItemType emailToSave = new CreateItemType(); 
      emailToSave.Items = new NonEmptyArrayOfAllItemsType(); 
      emailToSave.Items.Items = new ItemType[1]; 
      emailToSave.Items.Items[0] = email; 
      emailToSave.MessageDisposition = MessageDispositionType.SaveOnly; 
      emailToSave.MessageDispositionSpecified = true; 

      CreateItemResponseType response = esb.CreateItem(emailToSave); 
      ResponseMessageType[] rmta = response.ResponseMessages.Items; 
      ItemInfoResponseMessageType emailResponseMessage = (ItemInfoResponseMessageType)rmta[0]; 

      //Create the file attachment. 
      FileAttachmentType fileAttachment = new FileAttachmentType(); 
      fileAttachment.Content = attachmentAsBytes; 
      fileAttachment.Name = attachmentName; 
      fileAttachment.ContentType = "application/ms-excel"; 

      CreateAttachmentType attachmentRequest = new CreateAttachmentType(); 
      attachmentRequest.Attachments = new AttachmentType[1]; 
      attachmentRequest.Attachments[0] = fileAttachment; 
      attachmentRequest.ParentItemId = emailResponseMessage.Items.Items[0].ItemId; 

      //Attach the file to the message. 
      CreateAttachmentResponseType attachmentResponse = (CreateAttachmentResponseType)esb.CreateAttachment(attachmentRequest); 
      AttachmentInfoResponseMessageType attachmentResponseMessage = (AttachmentInfoResponseMessageType)attachmentResponse.ResponseMessages.Items[0]; 

      //Create a new item id type using the change key and item id of the email message so that we know what email to send. 
      ItemIdType attachmentItemId = new ItemIdType(); 
      attachmentItemId.ChangeKey = attachmentResponseMessage.Attachments[0].AttachmentId.RootItemChangeKey; 
      attachmentItemId.Id = attachmentResponseMessage.Attachments[0].AttachmentId.RootItemId; 

      //Send the email. 
      SendItemType si = new SendItemType(); 
      si.ItemIds = new BaseItemIdType[1]; 
      si.SavedItemFolderId = new TargetFolderIdType(); 
      si.ItemIds[0] = attachmentItemId; 
      DistinguishedFolderIdType siSentItemsFolder = new DistinguishedFolderIdType(); 
      siSentItemsFolder.Id = DistinguishedFolderIdNameType.sentitems; 
      si.SavedItemFolderId.Item = siSentItemsFolder; 
      si.SaveItemToFolder = true; 

      SendItemResponseType siSendItemResponse = esb.SendItem(si); 
     } 

Answer 2

我知道這個問題很舊，但我在搜索谷歌後登陸了這裏。以下是使用語句更新後的簡化工作答案。

您需要將nuget包Microsoft.Exchange.WebServices添加到您的項目中（當前版本爲2.2.0）。

using Microsoft.Exchange.WebServices.Data; 

namespace Exchange 
{ 
    public static class Emailer 
    { 
     public static void SendEmail(string from, string to, string subject, string body, byte[] attachmentBytes, string attachmentName) 
     { 
      var service = new ExchangeService(ExchangeVersion.Exchange2007_SP1); 
      service.AutodiscoverUrl(from); 
      var message = new EmailMessage(service) 
      { 
       Subject = subject, 
       Body = body, 
      }; 
      message.ToRecipients.Add(to); 
      message.Attachments.AddFileAttachment(attachmentName, attachmentBytes); 
      message.SendAndSaveCopy(); 
     } 
    } 
} 

到service.AutodiscoverUrl呼叫可以採取許多秒 - 如果你知道的網址，然後你就可以避免調用AutodiscoverUrl和直接設置它。 （您可以通過調用AutodiscoverUrl然後打印service.Url來恢復一次。）

// service.AutodiscoverUrl(from); // This can be slow 
service.Url = new System.Uri("https://outlook.domain.com/ews/exchange.asmx");