SortedDictionary<TKey,TValue>.Keys 屬性

public:
 property System::Collections::Generic::SortedDictionary<TKey, TValue>::KeyCollection ^ Keys { System::Collections::Generic::SortedDictionary<TKey, TValue>::KeyCollection ^ get(); };

public System.Collections.Generic.SortedDictionary<TKey,TValue>.KeyCollection Keys { get; }

member this.Keys : System.Collections.Generic.SortedDictionary<'Key, 'Value>.KeyCollection

Public ReadOnly Property Keys As SortedDictionary(Of TKey, TValue).KeyCollection

屬性值

SortedDictionary<TKey,TValue>.KeyCollection A 包含 的鍵。SortedDictionary<TKey,TValue>

範例

以下程式碼範例說明如何利用 屬性 Keys 枚舉字典中的鍵，以及如何枚舉字典中的鍵與值。

這些程式碼是更大範例的一部分，可以編譯並執行。 參見 SortedDictionary<TKey,TValue>。

// To get the keys alone, use the Keys property.
SortedDictionary<string, string>.KeyCollection keyColl =
    openWith.Keys;

// The elements of the KeyCollection are strongly typed
// with the type that was specified for dictionary keys.
Console.WriteLine();
foreach( string s in keyColl )
{
    Console.WriteLine("Key = {0}", s);
}

' To get the keys alone, use the Keys property.
Dim keyColl _
    As SortedDictionary(Of String, String).KeyCollection = _
    openWith.Keys

' The elements of the KeyCollection are strongly typed
' with the type that was specified for dictionary keys.
Console.WriteLine()
For Each s As String In keyColl 
    Console.WriteLine("Key = {0}", s)
Next s

// When you use foreach to enumerate dictionary elements,
// the elements are retrieved as KeyValuePair objects.
Console.WriteLine();
foreach( KeyValuePair<string, string> kvp in openWith )
{
    Console.WriteLine("Key = {0}, Value = {1}",
        kvp.Key, kvp.Value);
}

' When you use foreach to enumerate dictionary elements,
' the elements are retrieved as KeyValuePair objects.
Console.WriteLine()
For Each kvp As KeyValuePair(Of String, String) In openWith
    Console.WriteLine("Key = {0}, Value = {1}", _
        kvp.Key, kvp.Value)
Next kvp

備註

中的SortedDictionary<TKey,TValue>.KeyCollection鍵是依據屬性Comparer排序，且與屬性回傳SortedDictionary<TKey,TValue>.ValueCollection的Values相關值順序相同。

返回 SortedDictionary<TKey,TValue>.KeyCollection 的 不是靜態副本;而是 SortedDictionary<TKey,TValue>.KeyCollection 回溯到原始 SortedDictionary<TKey,TValue>的金鑰。 因此，變化 SortedDictionary<TKey,TValue> 會持續反映在 SortedDictionary<TKey,TValue>.KeyCollection中。

取得此性質的值需進行 O（1） 運算。

另請參閱

• SortedDictionary<TKey,TValue>.KeyCollection
• Values