DictionaryEntry 構造体
定義
設定または取得できる、ディクショナリのキー/値ペアを定義します。Defines a dictionary key/value pair that can be set or retrieved.
public value class DictionaryEntry
public struct DictionaryEntry
[System.Serializable]
public struct DictionaryEntry
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public struct DictionaryEntry
type DictionaryEntry = struct
[<System.Serializable>]
type DictionaryEntry = struct
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type DictionaryEntry = struct
Public Structure DictionaryEntry
- 継承
- 属性
例
次の例は、を使用し DictionaryEntry てオブジェクトを反復処理する方法を示して Hashtable います。The following example demonstrates the use of DictionaryEntry to iterate through a Hashtable object.
// A simple example for the DictionaryEntry structure.
using namespace System;
using namespace System::Collections;
public ref class Example
{
public:
static void Main()
{
// Create a new hash table.
//
Hashtable^ openWith = gcnew Hashtable();
// Add some elements to the hash table. There are no
// duplicate keys, but some of the values are duplicates.
openWith->Add("txt", "notepad.exe");
openWith->Add("bmp", "paint.exe");
openWith->Add("dib", "paint.exe");
openWith->Add("rtf", "wordpad.exe");
// When you use foreach to enumerate hash table elements,
// the elements are retrieved as DictionaryEntry objects.
Console::WriteLine();
for each (DictionaryEntry de in openWith)
{
Console::WriteLine("Key = {0}, Value = {1}", de.Key, de.Value);
}
}
};
int main()
{
Example::Main();
}
/* This code example produces output similar to the following:
Key = rtf, Value = wordpad.exe
Key = txt, Value = notepad.exe
Key = dib, Value = paint.exe
Key = bmp, Value = paint.exe
*/
// A simple example for the DictionaryEntry structure.
using System;
using System.Collections;
class Example
{
public static void Main()
{
// Create a new hash table.
//
Hashtable openWith = new Hashtable();
// Add some elements to the hash table. There are no
// duplicate keys, but some of the values are duplicates.
openWith.Add("txt", "notepad.exe");
openWith.Add("bmp", "paint.exe");
openWith.Add("dib", "paint.exe");
openWith.Add("rtf", "wordpad.exe");
// When you use foreach to enumerate hash table elements,
// the elements are retrieved as DictionaryEntry objects.
Console.WriteLine();
foreach (DictionaryEntry de in openWith)
{
Console.WriteLine("Key = {0}, Value = {1}", de.Key, de.Value);
}
}
}
/* This code example produces output similar to the following:
Key = rtf, Value = wordpad.exe
Key = txt, Value = notepad.exe
Key = dib, Value = paint.exe
Key = bmp, Value = paint.exe
*/
'A simple example for the DictionaryEntry structure.
Imports System.Collections
Module Example
Sub Main()
' Create a new hash table.
'
Dim openWith As New Hashtable()
' Add some elements to the hash table. There are no
' duplicate keys, but some of the values are duplicates.
openWith.Add("txt", "notepad.exe")
openWith.Add("bmp", "paint.exe")
openWith.Add("dib", "paint.exe")
openWith.Add("rtf", "wordpad.exe")
' When you use For Each to enumerate hash table elements,
' the elements are retrieved as DictionaryEntry objects.
Console.WriteLine()
For Each de As DictionaryEntry In openWith
Console.WriteLine("Key = {0}, Value = {1}", _
de.Key, de.Value)
Next de
End Sub
End Module
' This code example produces output similar to the following:
'
'Key = rtf, Value = wordpad.exe
'Key = txt, Value = notepad.exe
'Key = dib, Value = paint.exe
'Key = bmp, Value = paint.exe
注釈
メソッドは、 IDictionaryEnumerator.Entry この型のインスタンスを返します。The IDictionaryEnumerator.Entry method returns an instance of this type.
重要
新しい開発には構造を使用しないことをお勧めし DictionaryEntry
ます。We don't recommend that you use the DictionaryEntry
structure for new development. 代わりに、ジェネリック構造体をクラスと共に使用することをお勧めし KeyValuePair<TKey,TValue> Dictionary<TKey,TValue> ます。Instead, we recommend that you use a generic KeyValuePair<TKey,TValue> structure along with the Dictionary<TKey,TValue> class. 詳細については、「GitHub で 非ジェネリックコレクションを使用することはでき ません。」を参照してください。For more information, see Non-generic collections shouldn't be used on GitHub.
C# の foreach ステートメントと各ステートメント の Visual Basic には、コレクション内の各要素の型が必要です。The C# foreach statement and the Visual Basic For Each statement require the type of each element in the collection. の各要素 IDictionary はキーと値のペアであるため、要素の型はキーの型でも、値の型でもありません。Since each element of the IDictionary is a key/value pair, the element type is not the type of the key or the type of the value. 代わりに、要素の型は DictionaryEntry です。Instead, the element type is DictionaryEntry. 次に例を示します。For example:
for each (DictionaryEntry de in openWith)
{
Console::WriteLine("Key = {0}, Value = {1}", de.Key, de.Value);
}
foreach (DictionaryEntry de in openWith)
{
Console.WriteLine("Key = {0}, Value = {1}", de.Key, de.Value);
}
For Each de As DictionaryEntry In openWith
Console.WriteLine("Key = {0}, Value = {1}", _
de.Key, de.Value)
Next de
foreach
ステートメントは、列挙子のラッパーであり、コレクションへの書き込みではなく読み取りのみが許可されます。The foreach
statement is a wrapper around the enumerator, which only allows reading from, not writing to, the collection.
コンストラクター
DictionaryEntry(Object, Object) |
指定したキーと値を使用して、DictionaryEntry 型のインスタンスを初期化します。Initializes an instance of the DictionaryEntry type with the specified key and value. |
プロパティ
Key |
キー/値ペア内のキーを取得または設定します。Gets or sets the key in the key/value pair. |
Value |
キー/値ペア内の値を取得または設定します。Gets or sets the value in the key/value pair. |
メソッド
Deconstruct(Object, Object) |
現在の DictionaryEntry を分解します。Deconstructs the current DictionaryEntry. |