通过Exchange Web服务访问的投票按钮扩展属性 [英] Access the voting buttons extended property through Exchange Web Services

问题描述

我使用的Exchange Web服务（Exchange Server 2007中），以尝试用投票按钮发送电子邮件研究。

I'm using the Exchange Web Services (Exchange server 2007) to try to send an email with voting buttons in.

我读了这个问题/回答：
  <一href="http://stackoverflow.com/questions/3012883/send-voting-email">http://stackoverflow.com/questions/3012883/send-voting-email

I read this question/answer:
http://stackoverflow.com/questions/3012883/send-voting-email

我已经使用Outlook 2007发送给我简单的是一个电子邮件有一个同事/没有投票按钮（按钮在Outlook中显示，我并没有打发一个答案），我可以证实，这是在我的收件箱中的第一封电子邮件。

I have had a colleague using Outlook 2007 send me an email with simple yes/no voting buttons (the buttons display in Outlook, I have not sent an answer) and I can confirm that it is the first email in my Inbox.

然后，我用的EWS来获取电子邮件，并得到有关的电子邮件的扩展属性，这样我就可以得到相关的投票按钮，二进制，因而带有投票按钮送我自己的电子邮件。

I've then used the EWS to get that email and try to get the extended properties relating to the email, so I can get the binary related to the voting buttons and thus send my own email with voting buttons.

下面是我的code。

ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);

service.Url = new Uri(ConfigurationManager.AppSettings["URL"]);

service.Credentials = new NetworkCredential(
    ConfigurationManager.AppSettings["Username"], 
    ConfigurationManager.AppSettings["Password"], 
    ConfigurationManager.AppSettings["Domain"]
    );


Item foundItem = service.FindItems(WellKnownFolderName.Inbox, new ItemView(10)).Items[0];

ExtendedPropertyDefinition epd = new ExtendedPropertyDefinition(
    DefaultExtendedPropertySet.Common,
    0x00008520,
    MapiPropertyType.Binary
);

object propertyValue = null;

bool outBool;

outBool = foundItem.TryGetProperty(epd, out propertyValue);

outBool 永远是假的，而为PropertyValue 始终保持为空。

outBool is always false, and propertyValue always stays null.

当我把一个断点，并看看 foundItem 属性的其余部分是正确的 - 例如：发件人，主题行，日期/时间发送等。

When I put a breakpoint and look at foundItem the rest of the properties are correct - e.g. the sender, subject line, date/time sent, etc.

还有 foundItem.ExtendedProperties 总是有计数为零。 Shoudln't有什么东西在这个属性？

Also foundItem.ExtendedProperties always has a count of zero. Shoudln't there be something in this property?

推荐答案

我发现我需要这里的信息：
<一href="http://social.technet.microsoft.com/Forums/en/exchangesvrdevelopment/thread/2dbab0f2-b23f-4808-8f55-9ecc77edf877" rel="nofollow">http://social.technet.microsoft.com/Forums/en/exchangesvrdevelopment/thread/2dbab0f2-b23f-4808-8f55-9ecc77edf877

I found the information I needed here:
http://social.technet.microsoft.com/Forums/en/exchangesvrdevelopment/thread/2dbab0f2-b23f-4808-8f55-9ecc77edf877

C＃

ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);

service.Url = new Uri(ConfigurationManager.AppSettings["URL"]);

service.Credentials = new NetworkCredential(
    ConfigurationManager.AppSettings["Username"], 
    ConfigurationManager.AppSettings["Password"], 
    ConfigurationManager.AppSettings["Domain"]
    );

Item foundItem = service.FindItems(WellKnownFolderName.Inbox, new ItemView(10)).Items[0];

ExtendedPropertyDefinition myProp = new ExtendedPropertyDefinition(
    DefaultExtendedPropertySet.Common,
    0x00008520,
    MapiPropertyType.Binary
);

EmailMessage otherMessage = EmailMessage.Bind(service, foundItem.Id, new PropertySet(myProp));
byte[] bytes = (byte[])otherMessage[myProp];   

VB

Dim service As New ExchangeService(ExchangeVersion.Exchange2007_SP1)
service.Url = New Uri(ConfigurationManager.AppSettings("URL"))
service.Credentials = New NetworkCredential(ConfigurationManager.AppSettings("Username"), ConfigurationManager.AppSettings("Password"), ConfigurationManager.AppSettings("Domain"))

Dim myProp As New ExtendedPropertyDefinition(
   DefaultExtendedPropertySet.Common,
   34080,
   MapiPropertyType.Binary
)

Dim foundItem As Item = service.FindItems(WellKnownFolderName.Inbox, New ItemView(10))(0)

Dim otherMessage As EmailMessage = EmailMessage.Bind(service, foundItem.Id, New PropertySet(myProp))
Dim bytes As Byte() = DirectCast(otherMessage(myProp), Byte())

希望这可以帮助别人。

Hope this helps somebody.

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