HOW TO：判斷目前的 Outlook 項目
這個範例會使用 Explorer.SelectionChange 事件來顯示目前資料夾的名稱，以及已選取項目的某些相關資訊。 之後，程式碼就會顯示選取的項目。
**適用於：**本主題中的資訊適用於 Outlook 2007 和 Outlook 2010 的應用程式層級專案。如需詳細資訊，請參閱依 Office 應用程式和專案類型提供的功能。
範例
Dim WithEvents currentExplorer As Outlook.Explorer = Nothing
Private Sub ThisAddIn_Startup(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles Me.Startup
currentExplorer = Me.Application.Explorers.Application.ActiveExplorer
AddHandler currentExplorer.SelectionChange, AddressOf _
currentExplorer_Event
End Sub
Public Sub currentExplorer_Event()
Dim selectedFolder As Outlook.MAPIFolder = _
Me.Application.ActiveExplorer().CurrentFolder
Dim expMessage As String = "Your current folder is " _
& selectedFolder.Name & "." & vbCrLf
Dim itemMessage As String = "Item is unknown."
Try
If Me.Application.ActiveExplorer.Selection.Count > 0 Then
Dim selObject As Object = Me.Application.ActiveExplorer _
.Selection.Item(1)
If (TypeOf selObject Is Outlook.MailItem) Then
Dim mailItem As Outlook.MailItem = _
TryCast(selObject, Outlook.MailItem)
itemMessage = "The item is an e-mail message." & _
" The subject is " & mailItem.Subject & "."
mailItem.Display(False)
ElseIf (TypeOf selObject Is Outlook.ContactItem) Then
Dim contactItem As Outlook.ContactItem = _
TryCast(selObject, Outlook.ContactItem)
itemMessage = "The item is a contact." & _
" The full name is " & _
contactItem.Subject & "."
contactItem.Display(False)
ElseIf (TypeOf selObject Is Outlook. _
AppointmentItem) Then
Dim apptItem As Outlook.AppointmentItem = _
TryCast(selObject, Outlook.AppointmentItem)
itemMessage = "The item is an appointment." _
& apptItem.Subject & "."
ElseIf (TypeOf selObject Is Outlook.TaskItem) Then
Dim taskItem As Outlook.TaskItem = _
TryCast(selObject, Outlook.TaskItem)
itemMessage = "The item is a task." & _
" The body is " & taskItem.Body & "."
ElseIf (TypeOf selObject Is Outlook.MeetingItem) Then
Dim meetingItem As Outlook.MeetingItem = _
TryCast(selObject, Outlook.MeetingItem)
itemMessage = "The item is a meeting item. " & _
"The subject is " & meetingItem.Subject & "."
End If
End If
expMessage = expMessage & itemMessage
Catch ex As Exception
expMessage = ex.Message
End Try
MsgBox(expMessage)
End Sub
Outlook.Explorer currentExplorer = null;
private void ThisAddIn_Startup
(object sender, System.EventArgs e)
{
currentExplorer = this.Application.ActiveExplorer();
currentExplorer.SelectionChange += new Outlook
.ExplorerEvents_10_SelectionChangeEventHandler
(CurrentExplorer_Event);
}
private void CurrentExplorer_Event()
{
Outlook.MAPIFolder selectedFolder =
this.Application.ActiveExplorer().CurrentFolder;
String expMessage = "Your current folder is "
+ selectedFolder.Name + ".\n";
String itemMessage = "Item is unknown.";
try
{
if (this.Application.ActiveExplorer().Selection.Count > 0)
{
Object selObject = this.Application.ActiveExplorer().Selection[1];
if (selObject is Outlook.MailItem)
{
Outlook.MailItem mailItem =
(selObject as Outlook.MailItem);
itemMessage = "The item is an e-mail message." +
" The subject is " + mailItem.Subject + ".";
mailItem.Display(false);
}
else if (selObject is Outlook.ContactItem)
{
Outlook.ContactItem contactItem =
(selObject as Outlook.ContactItem);
itemMessage = "The item is a contact." +
" The full name is " + contactItem.Subject + ".";
contactItem.Display(false);
}
else if (selObject is Outlook.AppointmentItem)
{
Outlook.AppointmentItem apptItem =
(selObject as Outlook.AppointmentItem);
itemMessage = "The item is an appointment." +
" The subject is " + apptItem.Subject + ".";
}
else if (selObject is Outlook.TaskItem)
{
Outlook.TaskItem taskItem =
(selObject as Outlook.TaskItem);
itemMessage = "The item is a task. The body is "
+ taskItem.Body + ".";
}
else if (selObject is Outlook.MeetingItem)
{
Outlook.MeetingItem meetingItem =
(selObject as Outlook.MeetingItem);
itemMessage = "The item is a meeting item. " +
"The subject is " + meetingItem.Subject + ".";
}
}
expMessage = expMessage + itemMessage;
}
catch (Exception ex)
{
expMessage = ex.Message;
}
MessageBox.Show(expMessage);
}
編譯程式碼
這個範例需要：
- Microsoft Office Outlook 中的約會、連絡人和電子郵件項目。