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通过Exchange Web服务访问投票按钮扩展属性

exchangewebservices .net-4.0 c#

bgs264 · 技术社区 · 15 年前

我读到这个问题/答案:
Send Voting Email

我有一位同事使用Outlook 2007向我发送了一封带有简单的“是/否”投票按钮的电子邮件(outlook2007中显示的按钮,我没有发送答案),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,并尝试获取与该电子邮件相关的扩展属性,这样我就可以获取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。

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 总是假的,而且 propertyValue 始终保持为空。

当我设置断点并查看 foundItem 其他属性正确-例如发件人、主题行、发送日期/时间等。

阿尔索 foundItem.ExtendedProperties 总是计数为零。这地方不应该有什么东西吗?

1 回复 | 直到 9 年前

bgs264 15 年前

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类#

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语言

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())