IDictionary<TKey,TValue>.Keys 属性

定义

命名空间:

System.Collections.Generic

程序集:

System.Runtime.dll

获取包含 ICollection<T> 的键的 IDictionary<TKey,TValue>。

public:
 property System::Collections::Generic::ICollection<TKey> ^ Keys { System::Collections::Generic::ICollection<TKey> ^ get(); };

public System.Collections.Generic.ICollection<TKey> Keys { get; }

member this.Keys : System.Collections.Generic.ICollection<'Key>

Public ReadOnly Property Keys As ICollection(Of TKey)

属性值

ICollection<TKey>

一个 ICollection<T>，它包含实现 IDictionary<TKey,TValue> 的对象的键。

示例

下面的代码示例演示如何使用 Keys 属性单独枚举键。

此代码是可以编译和执行的更大示例的一部分。 请参阅 System.Collections.Generic.IDictionary<TKey,TValue>。

// To get the keys alone, use the Keys property.
icoll = openWith->Keys;

// The elements of the ValueCollection are strongly typed
// with the type that was specified for dictionary values.
Console::WriteLine();
for each( String^ s in icoll )
{
    Console::WriteLine("Key = {0}", s);
}

// To get the keys alone, use the Keys property.
icoll = openWith.Keys;

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

' To get the keys alone, use the Keys property.
icoll = openWith.Keys

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

注解

返回ICollection<T>的 中键的顺序未指定，但保证与 属性返回Values的 中的ICollection<T>相应值的顺序相同。

另请参阅

• ICollection<T>