設定或傳回 Dictionary 物件中指定索引鍵的項目。對於集合,會根據指定索引鍵傳回項目。讀取/寫入。
語法
object.Item(key)[ = newitem]
引數:
Object:必要。一律是集合或 Dictionary 物件的名稱。
Key:必要。與要擷取或新增之項目相關聯的索引鍵。
Newitem:選擇性。僅用於 Dictionary 物件;不適用於集合。如有提供,則 newitem 是與指定索引鍵相關聯的新值。
備註
如果變更項目時找不到索引鍵,則會使用指定的 newitem 建立新的索引鍵。如果嘗試傳回現有項目時找不到索引鍵,則會建立新的索引鍵,並將其對應的項目保留空白。
下列範例說明 Item 特性的用法。
範例 1:
Function GetItem
Dim d ' Create some variables.
Set d = CreateObject("Scripting.Dictionary")
' Add some keys and items.
d.Add "a", "Athens"
d.Add "b", "Belgrade"
d.Add "c", "Cairo"
' Get the item for key "c".
GetItem = d.Item("c")
End Function
' Usage
Dim result
result = GetItem()
' Output: Cairo
範例 2:
Function SetExistingItem
Dim d ' Create some variables.
Set d = CreateObject("Scripting.Dictionary")
' Add some keys and items.
d.Add "x", "Xenon"
d.Add "y", "Yttrium"
d.Add "z", "Zirconium"
' Set a new item for key "y".
d.Item("y") = "Yosemite"
' Get the item for key "y".
SetExistingItem = d.Item("y")
End Function
' Usage
Dim result
result = SetExistingItem()
' Output: Yosemite
範例 3:
Function AddNewItem
Dim d ' Create some variables.
Set d = CreateObject("Scripting.Dictionary")
' Add some keys and items.
d.Add "m", "Moscow"
d.Add "n", "New York"
d.Add "t", "Tokyo"
' Attempt to get an item for a non-existing key and set a new item.
d.Item("p") = "Paris"
' Get the item for the newly added key "p".
AddNewItem = d.Item("p")
End Function
' Usage
Dim result
result = AddNewItem()
' Output: Paris