Dictionary<TKey,TValue>.Keys Özellik

Tanım

İçindeki anahtarları içeren bir koleksiyon alır Dictionary<TKey,TValue> .Gets a collection containing the keys in the Dictionary<TKey,TValue>.

public:
 property System::Collections::Generic::Dictionary<TKey, TValue>::KeyCollection ^ Keys { System::Collections::Generic::Dictionary<TKey, TValue>::KeyCollection ^ get(); };
public System.Collections.Generic.Dictionary<TKey,TValue>.KeyCollection Keys { get; }
member this.Keys : System.Collections.Generic.Dictionary<'Key, 'Value>.KeyCollection
Public ReadOnly Property Keys As Dictionary(Of TKey, TValue).KeyCollection

Özellik Değeri

Dictionary<TKey,TValue>.KeyCollection

Dictionary<TKey,TValue>.KeyCollectionİçindeki anahtarları içeren bir Dictionary<TKey,TValue> .A Dictionary<TKey,TValue>.KeyCollection containing the keys in the Dictionary<TKey,TValue>.

Örnekler

Aşağıdaki kod örneğinde, özelliğini kullanarak Sözlükteki anahtarların nasıl numaralandırılacağı Keys ve Sözlükteki anahtarların ve değerlerin nasıl numaralandırılacağı gösterilmektedir.The following code example shows how to enumerate the keys in the dictionary using the Keys property, and how to enumerate the keys and values in the dictionary.

Bu kod, derlenebilecek ve yürütülebilecek daha büyük bir örneğin bir parçasıdır ( openWith Bu örnekte kullanılan sözlüğün adıdır).This code is part of a larger example that can be compiled and executed (openWith is the name of the Dictionary used in this example). Bkz. Dictionary<TKey,TValue>.See Dictionary<TKey,TValue>.

// To get the keys alone, use the Keys property.
Dictionary<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();
for each( String^ s in keyColl )
{
    Console::WriteLine("Key = {0}", s);
}
// To get the keys alone, use the Keys property.
Dictionary<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 _
    Dictionary(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();
for each( 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();
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

Açıklamalar

İçindeki anahtarların sırası Dictionary<TKey,TValue>.KeyCollection belirtilmemiş, ancak Dictionary<TKey,TValue>.ValueCollection özelliği tarafından döndürülen ilişkili değerlerle aynı sıradır Values .The order of the keys in the Dictionary<TKey,TValue>.KeyCollection is unspecified, but it is the same order as the associated values in the Dictionary<TKey,TValue>.ValueCollection returned by the Values property.

Döndürülen Dictionary<TKey,TValue>.KeyCollection bir statik kopya değil; bunun yerine Dictionary<TKey,TValue>.KeyCollection başlangıçtaki anahtarlara geri başvurur Dictionary<TKey,TValue> .The returned Dictionary<TKey,TValue>.KeyCollection is not a static copy; instead, the Dictionary<TKey,TValue>.KeyCollection refers back to the keys in the original Dictionary<TKey,TValue>. Bu nedenle, devam eden değişiklikleri ' Dictionary<TKey,TValue> de yansıtılmalıdır Dictionary<TKey,TValue>.KeyCollection .Therefore, changes to the Dictionary<TKey,TValue> continue to be reflected in the Dictionary<TKey,TValue>.KeyCollection.

Bu özelliğin değerinin alınması bir O (1) işlemidir.Getting the value of this property is an O(1) operation.

Şunlara uygulanır

Ayrıca bkz.