Question

我正在使用Exchange Web服务（Exchange Server 2007）尝试发送带有投票按钮的电子邮件。

我读了这个问题/答案：
Send Voting Email

我有一位使用Outlook 2007的同事给我发了一封简单的是/否投票按钮的电子邮件（按钮显示在Outlook中，我还没有发送回答）我可以确认这是我收件箱中的第一封电子邮件。

然后我使用EWS获取该电子邮件并尝试获取与电子邮件相关的扩展属性，因此我可以获得与投票按钮相关的二进制文件，从而使用投票按钮发送我自己的电子邮件。

这是我的代码。

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始终为false，propertyValue始终为null。

当我设置断点并查看foundItem时，其余属性是正确的 - 例如发件人，主题行，发送日期/时间等

此外foundItem.ExtendedProperties的计数始终为零。该房产中没有什么东西？

Answer 1

我在这里找到了我需要的信息：
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())

希望这有助于某人。

通过Exchange Web服务访问投票按钮扩展属性

1 个答案: