Dictionary<TKey,TValue>.Keys 속성

정의

Dictionary<TKey,TValue>의 키를 포함하는 컬렉션을 가져옵니다.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

속성 값

Dictionary<TKey,TValue>.KeyCollection

Dictionary<TKey,TValue>.KeyCollection의 키를 포함하는 Dictionary<TKey,TValue>입니다.A Dictionary<TKey,TValue>.KeyCollection containing the keys in the Dictionary<TKey,TValue>.

예제

다음 코드 예제에서는 속성을 사용 하 여 사전에서 키를 열거 하는 방법과 Keys 사전에서 키와 값을 열거 하는 방법을 보여 줍니다.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.

이 코드는 컴파일 및 실행할 수 있는 더 큰 예제의 일부입니다 openWith .는이 예제에서 사용 되는 사전의 이름입니다.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). Dictionary<TKey,TValue>을 참조하세요.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

설명

에서 키의 순서는 지정 되지 Dictionary<TKey,TValue>.KeyCollection 않지만 속성이 반환 하는의 연결 된 값과 순서가 동일 합니다 Dictionary<TKey,TValue>.ValueCollection 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.

반환 된 Dictionary<TKey,TValue>.KeyCollection 이 정적 복사본이 아닌 경우는 Dictionary<TKey,TValue>.KeyCollection 원래의 키를 다시 참조 합니다 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>. 따라서에 대 한 변경 내용은에 Dictionary<TKey,TValue> 계속 반영 됩니다 Dictionary<TKey,TValue>.KeyCollection .Therefore, changes to the Dictionary<TKey,TValue> continue to be reflected in the Dictionary<TKey,TValue>.KeyCollection.

이 속성 값을 가져오는 것은 O (1) 연산입니다.Getting the value of this property is an O(1) operation.

적용 대상

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