问题描述
我不是在命名空间<$ C $类文件夹
和 MAPIFolder
之间的差别清晰C>展望。当我回顾在网上的代码,一些使用第一个,而其他人使用其他的语法和我真的不能确定:
- 这只是因为他们的无知(甚至更少,我可以告诉哪一组是正确的)
- 这是一些传统的(使用了不同版本的Outlook)
- 这是同样的事情(这是我相当肯定是不正确的,但谁也不知道)
- 这是一个继承结构(以及何时使用什么)
- 它只是避免类型问题(铸造及
为
-ing) - 这是其他原因(S)全部(如果有的话,它)
的方式
下面是我使用获得这两个代码。
Outlook.Folder defaultContactsFolder_1 =
this.Application.Session.GetDefaultFolder(
Outlook.OlDefaultFolders.olFolderContacts)作为Outlook.Folder;
Outlook.MAPIFolder defaultContactFolder_2 =
this.Application.GetNamespace(MAPI)GetDefaultFolder(
Outlook.OlDefaultFolders.olFolderContacts)。
的已取代的。看到这么帖子相关还有其他事件挂钩相比, MAPIFolder
Application.Session ==作为应用.GetNamespace(MAPI)
- 他们是可以互换的。看到这么帖子相关从Outlook 2003中随身携带接管及以下 - 他们刚刚被保持向后兼容性。有没有办法避免VSTO型铸造 - 你会不断地装箱和拆箱
I'm not clear on the difference between the classes Folder
and MAPIFolder
in the namespace Outlook
. When I review the code in the net, some use the first, while others use the other syntax and I can't really determine if:
- it's just because of their ignorance (and even less I can tell which group is the right one)
- it's some kind of legacy (usage for different versions of Outlook)
- it's the very same thing (something I'm fairly sure isn't true but one never knows)
- it's an inheritance structure (and what to use when)
- it's simply a way to avoid type issues (casting and
as
-ing) - it's other reason(s) entirely (and if so, which)
Here's the code I'm using for obtaining those two.
Outlook.Folder defaultContactsFolder_1 =
this.Application.Session.GetDefaultFolder(
Outlook.OlDefaultFolders.olFolderContacts) as Outlook.Folder;
Outlook.MAPIFolder defaultContactFolder_2 =
this.Application.GetNamespace("MAPI").GetDefaultFolder(
Outlook.OlDefaultFolders.olFolderContacts);
Folder
has superseded MAPIFolder
which is now deprecated. See related SO post. Folder
has additional event hooks as compared to MAPIFolder
Application.Session == Application.GetNamespace("MAPI")
- they are interchangeable. See related SO post.
MAPIFolder
and GetNamespace()
are carry overs from Outlook 2003 and below - they've just been kept for backwards compatibility. There's no way to avoid type casting with VSTO - you will constantly be boxing and unboxing.
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