是否可以通过编程方式重命名Outlook类别？

Question

我们正在开发Outlook 2007加载项。用于测试前景类别重命名我已经添加以下代码块

var session = Application.Session; 
var categories = session.Categories; 
var category1 = session.Categories[1]; 

//catefory1.Name is "Group1" before executing line below 
category1.Name = "TEST!!!"; 

Marshal.ReleaseComObject(category1); 
Marshal.ReleaseComObject(categories); 
Marshal.ReleaseComObject(session); 

到外接private void ThisAddIn_Startup(object sender, EventArgs e)方法结束。 类别已重命名，但如果Outlook已关闭，则会对上述行进行注释，并重新启动Outlook - 类别名称不是“TEST !!!”如我所料。与重命名之前一样，它是“Group1”。是否有可能通过代码“永远”重命名Outlook类别？ Microsoft.Office.Interop.Outlook.Category没有Save（）或Update（）或Persist（）方法。

P.S.我们正在使用Visual Studio 2008，.net 3.5，C＃3开发Outlook 2007加载项。 此问题与Outlook 2007 SP1和SP2一起再现。其他Outlook版本未经测试。

Answer 1

我已经使用黑客解决了问题（问题本身似乎是Outlook 2007错误）。 以下链接帮助我创造了黑客（哎呀，没有足够的信誉来发布更多然后1个链接）：

• HTTP：//blogs.officezealot.com/legault/archive/2009/08/13/ 21577.aspx
• http://www.officekb.com/Uwe/Forum.aspx/outlook-prog-addins/3142/Apply-Categories-to-other-users-Outlook-2007
• HTTP：//help.wugnet.com/office/set-master-category-list-Outlook-2007-ftopict1095935.html
• HTTP：//forums.slipstick.com/ showthread.php？t = 18189
• http：//msdn.microsoft.com/en-us/library/ee203806%28EXCHG.80%29.aspx

的黑客本身就是下面显示：

using System; 
using System.Text; 
using System.Xml; 
using System.IO; 
using Microsoft.Office.Interop.Outlook; 

namespace OutlookHack 
{ 
    public static class OutlookCategoryHelper 
    { 
     private const string CategoryListStorageItemIdentifier = "IPM.Configuration.CategoryList"; 
     private const string CategoryListPropertySchemaName = @"http://schemas.microsoft.com/mapi/proptag/0x7C080102"; 
     private const string CategoriesXmlElementNamespace = "CategoryList.xsd"; 
     private const string XmlNamespaceAttribute = "xmlns"; 
     private const string CategoryElement = "category"; 
     private const string NameAttribute = "name"; 

     public static void RenameCategory(string oldName, string newName, Application outlookApplication) 
     { 
      MAPIFolder calendarFolder = outlookApplication.Session.GetDefaultFolder(
       OlDefaultFolders.olFolderCalendar); 
      StorageItem categoryListStorageItem = calendarFolder.GetStorage(
       CategoryListStorageItemIdentifier, OlStorageIdentifierType.olIdentifyByMessageClass); 

      if (categoryListStorageItem != null) 
      { 
       PropertyAccessor categoryListPropertyAccessor = categoryListStorageItem.PropertyAccessor; 
       string schemaName = CategoryListPropertySchemaName; 
       try 
       { 
        // next statement raises Out of Memory error if property is too big 
        var xmlBytes = (byte[])categoryListPropertyAccessor.GetProperty(schemaName); 

        // the byte array has to be translated into a string and then the XML has to be parsed 
        var xmlReader = XmlReader.Create(new StringReader(Encoding.UTF8.GetString(xmlBytes))); 

        // xmlWriter will write new category list xml with renamed category 
        XmlWriterSettings settings = new XmlWriterSettings { Indent = true, IndentChars = ("\t") }; 
        var stringWriter = new StringWriter(); 
        var xmlWriter = XmlWriter.Create(stringWriter, settings); 

        xmlReader.Read(); // read xml declaration 
        xmlWriter.WriteNode(xmlReader, true); 
        xmlReader.Read(); // read categories 
        xmlWriter.WriteStartElement(xmlReader.Name, CategoriesXmlElementNamespace); 
        while (xmlReader.MoveToNextAttribute()) 
        { 
         if (xmlReader.Name != XmlNamespaceAttribute) // skip namespace attr 
         { 
          xmlWriter.WriteAttributeString(xmlReader.Name, xmlReader.Value); 
         } 
        } 
        while (xmlReader.Read()) 
        { 
         switch (xmlReader.NodeType) 
         { 
          case XmlNodeType.Element: // read category 
           xmlWriter.WriteStartElement(CategoryElement); 
           while (xmlReader.MoveToNextAttribute()) 
           { 
            if ((xmlReader.Name == NameAttribute) && (xmlReader.Value == oldName)) 
            { 
             xmlWriter.WriteAttributeString(NameAttribute, newName); 
            } 
            else 
            { 
             xmlWriter.WriteAttributeString(xmlReader.Name, xmlReader.Value); 
            } 
           } 
           xmlWriter.WriteEndElement(); 
           break; 
          case XmlNodeType.EndElement: // categories ended 
           xmlWriter.WriteEndElement(); 
           break; 
         } 
        } 
        xmlReader.Close(); 
        xmlWriter.Close(); 

        xmlBytes = Encoding.UTF8.GetBytes(stringWriter.ToString()); 
        categoryListPropertyAccessor.SetProperty(schemaName, xmlBytes); 
        categoryListStorageItem.Save(); 
       } 
       catch (OutOfMemoryException) 
       { 
        // if error is "out of memory error" then the XML blob was too big 
       } 
      } 
     } 
    } 
} 

这个辅助方法必须先于类重命名叫，例如：

var session = Application.Session; 
var categories = session.Categories; 
var category1 = session.Categories[1]; 

//catefory1.Name is "Group1" before executing line below 
OutlookCategoryHelper.RenameCategory(category1.Name, "TEST!!!", Application); 
category1.Name = "TEST!!!"; 

Marshal.ReleaseComObject(category1); 
Marshal.ReleaseComObject(categories); 
Marshal.ReleaseComObject(session); 

Answer 2

这是一个Outlook的错误与Outlook 2007 SP2介绍。

“请考虑以下情形：您可以运行自定义应用程序以在Outlook 2007中创建新类别。 运行应用程序以在Outlook 2007中创建新类别。然后，如果重新启动Outlook 2007，您创建的类别被意外删除。在安装Februarycumulative更新或SP2后，会发生此问题。“

有可用的修复程序自2009年6月30日： http://support.microsoft.com/default.aspx/kb/970944/en

问候， 添