VSTO OUTLOOK：获取刚刚在“ to”“ BC”中输入的最后一封电子邮件地址或“ CC”新的字段，回复或向前窗口
我正在尝试将最后一个收件人（电子邮件地址）引入刚刚引入“ TO”，“ BC”或“ CC”字段时。我该如何实现？
例如：
- 如果用户只是在“到”字段中的电子邮件地址中键入我想获得的字段。
- 如果用户只是在“ BC”字段中输入电子邮件地址，我想获得。
- 如果用户只是在“ CC”字段中输入电子邮件地址，我想获得。
I am trying to get the last recipient (email address) just introduced into the "To", "Bc" or "Cc" fields when field loses its focus. How can I achieve this?
For example:
- if user just types in an email address within "To" field I want to get that.
- if user just types in an email address within "Bc" field I want to get that.
- if user just types in an email address within "Cc" field I want to get that.
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使用
mailItem.propertychange事件。每当更改任何收件人（添加/删除）时，事件处理程序将对所有3个（TO/cc/bcc）属性发射，因此您将不知道哪一个更改。您需要先缓存旧值，当事件启动时，将其与新值进行比较。Use
MailItem.PropertyChangeevent. Whenever any recipient is changed (added/deleted), the event handler fires for all 3 (To/CC/BCC) properties, so your won't know which one changed. You'd need to cache the old value first, and when the event fires, compare it with new value.您可以处理 mailitem.propertyChange当对象的明确内置属性（例如，
主题）被更改时，它会发射。属性名称传递给事件，以便您可以确定哪个属性已更改。收件人属性返回a /a>集合，代表Outlook项目的所有收件人。因此，您可以轻松获得TO，CC或BCC字段的物品。You can handle the MailItem.PropertyChange event which is fired when an explicit built-in property (for example,
Subject) of the object is changed. The property name is passed to the event so that you can determine which property was changed.The
Recipientsproperty returns a Recipients collection that represents all the recipients for the Outlook item. So, you could get easily get the items for the To, Cc or Bcc fields.