Dictionary<TKey,TValue>.Keys Dictionary<TKey,TValue>.Keys Dictionary<TKey,TValue>.Keys Dictionary<TKey,TValue>.Keys Property

Definice

Získá kolekci obsahující klíče v 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

Hodnota vlastnosti

Příklady

Následující příklad kódu ukazuje, jak vytvořit výčet klíčů ve slovníku pomocí Keys vlastnosti a jak vytvořit výčet klíčů a hodnot ve slovníku.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.

Tento kód je součástí většího příkladu, který lze zkompilovat a spustit (openWith je název slovníku používaného v tomto příkladu).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). Viz 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

Poznámky

Pořadí klíčů v Dictionary<TKey,TValue>.KeyCollection je neurčeno, ale je stejné jako v případě přidružených hodnot v rámci Dictionary<TKey,TValue>.ValueCollection vráceného Values vlastností.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.

Vrácená Dictionary<TKey,TValue>.KeyCollection Dictionary<TKey,TValue>.KeyCollection položka není statická kopie; namísto toho odkazuje zpět na klíče v původní 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>. Proto se změny Dictionary<TKey,TValue> Dictionary<TKey,TValue>.KeyCollectionv tomto pokračování projeví v.Therefore, changes to the Dictionary<TKey,TValue> continue to be reflected in the Dictionary<TKey,TValue>.KeyCollection.

Získání hodnoty této vlastnosti je operace O (1).Getting the value of this property is an O(1) operation.

Platí pro

Viz také