获取“不在办公室”状态

Question

我正在制作一个控制台应用程序，用于向必须在其他客户端应用程序上执行某些操作的用户发送邮件。

这行得通。

问题是，我想避免发送邮件，如果此用户在其 Outlook 框上启用了“外出”消息（邮件的邮件客户端将始终是 Outlook）。

但我没有找到一种方法来检查“不在办公室”消息是否启用，无论是使用outlook interop 还是MailMessage。

因为“不在办公室”消息是第一次发送，所以我必须知道状态。

首先，使用 interop 或 MailMessage 会更容易吗？ 二、可以吗？

Answer 1

你可以使用 Redemption（我是它的作者）和它的 RDOOutOfOfficeAssistant 对象，但它需要先打开用户的邮箱。 您也可以直接使用 EWS 及其 GetUserOofSettingsRequest 动词。

Answer 2

我不确定 MailMessage，但我肯定会使用 Outlook 互操作！只要您从同一网络内发送邮件就可以了！

Answer 3

最简单的方法可能是使用 Exchange Web 服务 (EWS) 中的邮件提示来获取邮件用户的外出状态。此代码 sn-p 使用 Exchange 端的服务帐户，可以读取任意用户的帐户信息。 （如果您收到拒绝访问响应，您可能需要让您的 Exchange 管理员启用该帐户的模拟。）如果您只想测试代码，您可以为凭据指定您自己的域帐户并请求注销-您自己帐户的办公室状态。

// Returns the user's out-of-office message, or null if the user does not have out-of-office set.
public static string GetUserOutOfOfficeMessage(string userEmailAddress)
{
    const string outOfOfficeRequestMessageTemplate =
       @"<soap:Envelope xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance""
                        xmlns:xsd=""http://www.w3.org/2001/XMLSchema""
                        xmlns:soap=""http://schemas.xmlsoap.org/soap/envelope/""
                        xmlns:t=""http://schemas.microsoft.com/exchange/services/2006/types"">
            <soap:Header>
                <t:RequestServerVersion Version=""Exchange2010""/>
            </soap:Header>
            <soap:Body>
                <GetMailTips xmlns=""http://schemas.microsoft.com/exchange/services/2006/messages"">
                <SendingAs>
                    <t:EmailAddress>{0}</t:EmailAddress>
                    <t:RoutingType>SMTP</t:RoutingType></SendingAs>
                    <Recipients>
                    <t:Mailbox>
                        <t:EmailAddress>{1}</t:EmailAddress>
                        <t:RoutingType>SMTP</t:RoutingType>
                    </t:Mailbox>
                    </Recipients>
                <MailTipsRequested>OutOfOfficeMessage</MailTipsRequested>
                </GetMailTips>
            </soap:Body>
         </soap:Envelope>";

    string exchangeServiceUrl = "https://.../Exchange.asmx";  // get the full URL from your Exchange admin
    WebRequest exchangeServiceRequest = WebRequest.Create(exchangeServiceUrl);
    HttpWebRequest exchangeSoapServiceRequest = (HttpWebRequest)exchangeServiceRequest;
    exchangeSoapServiceRequest.Method = "POST";
    exchangeSoapServiceRequest.ContentType = "text/xml; charset=utf-8";
    exchangeSoapServiceRequest.ProtocolVersion = HttpVersion.Version11;
    exchangeSoapServiceRequest.Credentials = new NetworkCredential(serviceAccountUserName, 
        serviceAccountPassword, yourDomain);  // for serviceAccountUserName try either login name or email address
    exchangeSoapServiceRequest.Timeout = 60000;
    Stream exchangeSoapServiceRequestStream = exchangeSoapServiceRequest.GetRequestStream();

    using (StreamWriter exchangeServiceWriter = new StreamWriter(exchangeSoapServiceRequestStream, Encoding.ASCII))
    {
        string outOfOfficeMessageRequest = string.Format(
            outOfOfficeRequestMessageTemplate, serviceAccountUserName, userEmailAddress);

        try
        {
            exchangeServiceWriter.Write(outOfOfficeMessageRequest);
        }
        catch (Exception ex)
        {
            // log something
        }
        finally
        {
            exchangeServiceWriter.Close();
        }
    }

    string outOfOfficeResponse = null;
    string userOutOfOfficeMessage = null;

    try
    {
        HttpWebResponse exchangeServiceResponse = (HttpWebResponse)exchangeSoapServiceRequest.GetResponse();

        using (StreamReader exchangeServiceResponseStream = new StreamReader(exchangeServiceResponse.GetResponseStream()))
        {
            outOfOfficeResponse = exchangeServiceResponseStream.ReadToEnd();
        }
    }
    catch (Exception ex)
    {
        // log something
    }

    if (outOfOfficeResponse != null)
    {
        const int messageElementStartTagLength = 11;
        int messageStartIndex = outOfOfficeResponse.IndexOf("<t:Message>");

        if (messageStartIndex >= 0)
        {
            int messageEndIndex = outOfOfficeResponse.IndexOf("</t:Message>");

            if (messageEndIndex >= 0)
            {
                int outOfOfficeMessageLength = messageEndIndex - messageStartIndex;

                // Adjust for length of the <t:message> tag itself so that we don't include the tag in the output.
                messageStartIndex += messageElementStartTagLength;
                outOfOfficeMessageLength -= messageElementStartTagLength;

                userOutOfOfficeMessage = outOfOfficeResponse.Substring(messageStartIndex, outOfOfficeMessageLength);
            }
        }
    }

    return userOutOfOfficeMessage;
}