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SimpleItems Object (Outlook)

Represents a set of possibly heterogeneous Microsoft Outlook items, with each member in the set tracking only a small, common set of properties that apply to Outlook items in general.

Version Added: Outlook 2010

The SimpleItems collection is used to represent child objects of a Conversation node object. This collection has only few members and serves the purpose of providing easy access to these items, as opposed to the Items and Results collections, which have more members.

The order of items in the collection is the same as the ordering of items in the conversation. The collection is ordered by the value of the CreationTime property of each item in ascending order.

The following managed code is written in C#. To run a .NET Framework managed code sample that needs to call into a Component Object Model (COM), you must use an interop assembly that defines and maps managed interfaces to the COM objects in the object model type library. For Outlook, you can use Visual Studio and the Outlook Primary Interop Assembly (PIA). Before you run managed code samples for Outlook 2013, ensure that you have installed the Outlook 2013 PIA and have added a reference to the Microsoft Outlook 15.0 Object Library component in Visual Studio. You should use the following code in the ThisAddIn class of an Outlook add-in (using Office Developer Tools for Visual Studio). The Application object in the code must be a trusted Outlook Application object provided by ThisAddIn.Globals. For more information about using the Outlook PIA to develop managed Outlook solutions, see the Welcome to the Outlook 2013 Primary Interop Assembly Reference on MSDN.

The following code example assumes that the selected item in the explorer window is a mail item. The example obtains the conversation that the selected mail item is associated with, and enumerates each item in that conversation, displaying the subject of the item. The DemoConversation method calls the GetConversation method of the selected mail item to obtain the associated Conversation object. DemoConversation then calls the GetTable and GetRootItems methods of the Conversation object to obtain a Table object and SimpleItems collection, respectively. DemoConversation calls the recurrent method EnumerateConversation to enumerate and display the subject of each item in that conversation.

void DemoConversation() 
{ 
 object selectedItem = 
 Application.ActiveExplorer().Selection[1]; 
 // This example uses only 
 // MailItem. Other item types such as 
 // MeetingItem and PostItem can participate 
 // in the conversation. 
 if (selectedItem is Outlook.MailItem) 
 { 
 // Cast selectedItem to MailItem. 
 Outlook.MailItem mailItem = 
 selectedItem as Outlook.MailItem; 
 // Determine the store of the mail item. 
 Outlook.Folder folder = mailItem.Parent 
 as Outlook.Folder; 
 Outlook.Store store = folder.Store; 
 if (store.IsConversationEnabled == true) 
 { 
 // Obtain a Conversation object. 
 Outlook.Conversation conv = 
 mailItem.GetConversation(); 
 // Check for null Conversation. 
 if (conv != null) 
 { 
 // Obtain Table that contains rows 
 // for each item in the conversation. 
 Outlook.Table table = conv.GetTable(); 
 Debug.WriteLine("Conversation Items Count: " + 
 table.GetRowCount().ToString()); 
 Debug.WriteLine("Conversation Items from Table:"); 
 while (!table.EndOfTable) 
 { 
 Outlook.Row nextRow = table.GetNextRow(); 
 Debug.WriteLine(nextRow["Subject"] 
 + " Modified: " 
 + nextRow["LastModificationTime"]); 
 } 
 Debug.WriteLine("Conversation Items from Root:"); 
 // Obtain root items and enumerate the conversation. 
 Outlook.SimpleItems simpleItems 
 = conv.GetRootItems(); 
 foreach (object item in simpleItems) 
 { 
 // In this example, enumerate only MailItem type. 
 // Other types such as PostItem or MeetingItem 
 // can appear in the conversation. 
 if (item is Outlook.MailItem) 
 { 
 Outlook.MailItem mail = item 
 as Outlook.MailItem; 
 Outlook.Folder inFolder = 
 mail.Parent as Outlook.Folder; 
 string msg = mail.Subject 
 + " in folder " + inFolder.Name; 
 Debug.WriteLine(msg); 
 } 
 // Call EnumerateConversation 
 // to access child nodes of root items. 
 EnumerateConversation(item, conv); 
 } 
 } 
 } 
 } 
} 
 
 
void EnumerateConversation(object item, 
 Outlook.Conversation conversation) 
{ 
 Outlook.SimpleItems items = 
 conversation.GetChildren(item); 
 if (items.Count > 0) 
 { 
 foreach (object myItem in items) 
 { 
 // In this example, enumerate only MailItem type. 
 // Other types such as PostItem or MeetingItem 
 // can appear in the conversation. 
 if (myItem is Outlook.MailItem) 
 { 
 Outlook.MailItem mailItem = 
 myItem as Outlook.MailItem; 
 Outlook.Folder inFolder = 
 mailItem.Parent as Outlook.Folder; 
 string msg = mailItem.Subject 
 + " in folder " + inFolder.Name; 
 Debug.WriteLine(msg); 
 } 
 // Continue recursion. 
 EnumerateConversation(myItem, conversation); 
 } 
 } 
} 
 

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