以编程方式设置Outlook mailitem的类别? [英] Setting an Outlook mailitem's category programmatically?

问题描述

似乎没有太多信息或任何好的代码示例来通过编程方式设置Outlook 2007 MailItem的类别.

There doesn't seem to much information or any good code samples for setting an Outlook 2007 MailItem's categories programmatically.

MSDN的页面受限制，并提及使用VB的 Split 函数，说或多或少的是"您从这里开始就是你自己，所以请自己解决问题".

MSDN has a limited page, and mentions using VB's Split function, saying more or less "you're on your own from here onwards, so sort it out yourself".

据我所知，我们将类别作为mailitem的逗号分隔字符串属性进行操作.似乎有点原始，是所有的东西吗?

So far as I can tell we manipulate the Categories as a comma delimited string property of the mailitem. It seems a bit primitive, is that all there is to it?

每个人都只是挖出他们的字符串函数库并解析Categories属性，是否相信当为单个mailitem设置多个类别并且重命名(禁止天堂)类别时不会陷入混乱?

Does everyone just dig out their library of string functions and parse the Categories property, trusting not to get in a muddle when multiple categories are set for a single mailitem and (heaven forbid) categories are renamed?

推荐答案

您可以选择以任何方式操作用逗号分隔的Categories字符串.要插入类别，我通常会检查当前字符串是否为null，然后分配它.如果类别不为null，那么如果该类别不存在，则添加该类别.要删除项目，我只用一个空字符串替换类别名称.

You can choose to manipulate the comma-delimited string of Categories any way you choose. To insert a category, I usually check if the current string is null and then just assign it. If the category is not null then I append it if it doesn't already exist. To remove an item, I just replace the category name with an empty string.

 var customCat = "Custom Category";
 if (mailItem.Categories == null) // no current categories assigned
   mailItem.Categories = customCat;
 else if (!mailItem.Categories.Contains(customCat)) // insert as first assigned category
   mailItem.Categories = string.Format("{0}, {1}", customCat, mailItem.Categories);

正在删除类别

var customCat = "Custom Category";
if (mailItem.Categories.Contains(customCat))
  mailItem.Categories = mailItem.Categories.Replace(string.Format("{0}, ", customCat), "").Replace(string.Format("{0}", customCat), "");

有许多种操作字符串的方法-他们只是选择使序列化数据结构在下面保持简单.

There are multitudes of ways to manipulate strings - they just chose to keep the serialized data structure simple underneath.

我倾向于在加载项启动过程中创建自己的类别，以验证它们是否存在.当然-类别重命名是一个问题，但是如果您确保每次加载加载项时都存在类别，则至少可以确保一定程度的有效性.

I tend to create my own Categories during Add-in startup to verify they exist. Certainly - category renaming is a concern, but if you are ensuring that your categories exist each time your add-in loads, you can at least ensure some level of validity.

var customCat = "Custom Category";
if (Application.Session.Categories[customCat] == null)  
  Application.Session.Categories.Add(customCat, Outlook.OlCategoryColor.olCategoryColorDarkRed);

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