c# - 如何使用 Exchange Web 服务发送包含 text/plain 和 text/html 的多部分电子邮件？

Question

我通过命令行使用 wsdl 工具生成了一个命名空间，方法是将其指向 https://exchange-server/EWS/Services.wsdl。

我能够使用以下代码成功发送电子邮件:

const string EWS_USERNAME = "user";
const string EWS_PASSWORD = "pass";
const string EWS_DOMAIN = "domain";
const string EWS_URL = "https://exchange-server/EWS/Exchange.asmx";

var ews = new ExchangeServiceBinding();
ews.Credentials = new NetworkCredential(EWS_USERNAME, EWS_PASSWORD, EWS_DOMAIN);
ews.Url = EWS_URL;

var email = new MessageType();
email.IsFromMe = false;
email.From = new SingleRecipientType();
email.From.Item = new EmailAddressType();
email.From.Item.EmailAddress = "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="066074696b46637e676b766a632865696b" rel="noreferrer noopener nofollow">[email protected]</a>";

email.ToRecipients = new EmailAddressType[1] { new EmailAddressType { EmailAddress = "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9ae8fff9f3eaf3fff4eedaffe2fbf7eaf6ffb4f9f5f7" rel="noreferrer noopener nofollow">[email protected]</a>" } };

email.Subject = "Subject";

email.Body = new BodyType();
email.Body.BodyType1 = BodyTypeType.HTML;
email.Body.Value = "<strong>Test</strong>";

var emailToSave = new CreateItemType();
emailToSave.Items = new NonEmptyArrayOfAllItemsType();

emailToSave.Items.Items = new ItemType[1] { email };
emailToSave.MessageDisposition = MessageDispositionType.SendAndSaveCopy;
emailToSave.MessageDispositionSpecified = true;

ews.CreateItemCompleted += new CreateItemCompletedEventHandler(ExchangeWebServices_CreateItemCompleted);

ews.CreateItemAsync(emailToSave, callbackState);

我的问题是如何发送包含 HTML 和纯文本正文的多部分电子邮件？

Answer 1

Exchange 自动生成您邮件的纯文本版本。您无需执行任何操作即可实现这一点。