NameObjectCollectionBase.BaseGetAllKeys メソッドとは何？わかりやすく解説 Weblio辞書

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.NET Framework クラスライブラリリファレンス

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NameObjectCollectionBase.BaseGetAllKeys メソッド

NameObjectCollectionBase インスタンス内のすべてのキーを格納する String 配列を返します。

名前空間: System.Collections.Specialized
アセンブリ: System (system.dll 内)
構文

Visual Basic (宣言)

Protected Function BaseGetAllKeys As
 String()

Visual Basic (使用法)

Dim returnValue As String()

returnValue = Me.BaseGetAllKeys

protected string[] BaseGetAllKeys ()

C++

protected:
array<String^>^ BaseGetAllKeys ()

protected String[] BaseGetAllKeys ()

JScript

protected function BaseGetAllKeys () : String[]

戻り値
NameObjectCollectionBase インスタンス内のすべてのキーを格納する String 配列。

解説

このメソッドは O(n) 操作です。ここで、n は Count です。

使用例

BaseGetAllKeys と BaseGetAllValues を使用して、キーの配列や値の配列を取得する方法については、次のコード例を参照してください。

Visual Basic

Imports System
Imports System.Collections
Imports System.Collections.Specialized

Public Class MyCollection
   Inherits NameObjectCollectionBase

   Private _de As New DictionaryEntry()

   ' Gets a key-and-value pair (DictionaryEntry) using an index.
   Default Public ReadOnly
 Property Item(index As Integer)
 As DictionaryEntry
      Get
         _de.Key = Me.BaseGetKey(index)
         _de.Value = Me.BaseGet(index)
         Return _de
      End Get
   End Property

   ' Adds elements from an IDictionary into the new collection.
   Public Sub New(d As
 IDictionary)
      Dim de As DictionaryEntry
      For Each de In  d
         Me.BaseAdd(CType(de.Key, String),
 de.Value)
      Next de
   End Sub 'New

   ' Gets a String array that contains all the keys in the collection.
   Public ReadOnly Property
 AllKeys() As String()
      Get
         Return Me.BaseGetAllKeys()
      End Get
   End Property

   ' Gets an Object array that contains all the values in the collection.
   Public ReadOnly Property
 AllValues() As Array
      Get
         Return Me.BaseGetAllValues()
      End Get
   End Property

   ' Gets a String array that contains all the values in the collection.
   Public ReadOnly Property
 AllStringValues() As String()
      Get
         Return CType(Me.BaseGetAllValues(GetType(String)),
 String())
      End Get
   End Property

End Class 'MyCollection


Public Class SamplesNameObjectCollectionBase
   

   Public Shared Sub Main()

      ' Creates and initializes a new MyCollection instance.
      Dim d As New ListDictionary()
      d.Add("red", "apple")
      d.Add("yellow", "banana")
      d.Add("green", "pear")
      Dim myCol As New MyCollection(d)
      Console.WriteLine("Initial state of the collection (Count
 = {0}):", myCol.Count)
      PrintKeysAndValues(myCol)

      ' Displays the list of keys.
      Console.WriteLine("The list of keys:")
      Dim s As String
      For Each s In  myCol.AllKeys
         Console.WriteLine("   {0}", s)
      Next s

      ' Displays the list of values of type Object.
      Console.WriteLine("The list of values (Object):")
      Dim o As Object
      For Each o In  myCol.AllValues
         Console.WriteLine("   {0}", o.ToString())
      Next o

      ' Displays the list of values of type String.
      Console.WriteLine("The list of values (String):")
      For Each s In  myCol.AllValues
         Console.WriteLine("   {0}", s)
      Next s

   End Sub 'Main

   Public Shared Sub PrintKeysAndValues(myCol
 As MyCollection)
      Dim i As Integer
      For i = 0 To myCol.Count - 1
         Console.WriteLine("[{0}] : {1}, {2}", i,
 myCol(i).Key, myCol(i).Value)
      Next i
   End Sub 'PrintKeysAndValues

End Class 'SamplesNameObjectCollectionBase
 


'This code produces the following output.
'
'Initial state of the collection (Count = 3):
'[0] : red, apple
'[1] : yellow, banana
'[2] : green, pear
'The list of keys:
'   red
'   yellow
'   green
'The list of values (Object):
'   apple
'   banana
'   pear
'The list of values (String):
'   apple
'   banana
'   pear

using System;
using System.Collections;
using System.Collections.Specialized;

public class MyCollection : NameObjectCollectionBase
  {

   private DictionaryEntry _de = new DictionaryEntry();

   // Gets a key-and-value pair (DictionaryEntry) using an index.
   public DictionaryEntry this[ int
 index ]  {
      get  {
         _de.Key = this.BaseGetKey( index );
         _de.Value = this.BaseGet( index );
         return( _de );
      }
   }

   // Adds elements from an IDictionary into the new collection.
   public MyCollection( IDictionary d )  {
      foreach ( DictionaryEntry de in d ) 
 {
         this.BaseAdd( (String) de.Key, de.Value );
      }
   }

   // Gets a String array that contains all the keys in the collection.
   public String[] AllKeys  {
      get  {
         return( this.BaseGetAllKeys() );
      }
   }

   // Gets an Object array that contains all the values in the collection.
   public Array AllValues  {
      get  {
         return( this.BaseGetAllValues() );
      }
   }

   // Gets a String array that contains all the values in the collection.
   public String[] AllStringValues  {
      get  {
         return( (String[]) this.BaseGetAllValues(
 typeof(System.String) ) );
      }
   }

}

public class SamplesNameObjectCollectionBase
  {

   public static void Main()
  {

      // Creates and initializes a new MyCollection instance.
      IDictionary d = new ListDictionary();
      d.Add( "red", "apple" );
      d.Add( "yellow", "banana" );
      d.Add( "green", "pear" );
      MyCollection myCol = new MyCollection( d );
      Console.WriteLine( "Initial state of the collection (Count = {0}):",
 myCol.Count );
      PrintKeysAndValues( myCol );

      // Displays the list of keys.
      Console.WriteLine( "The list of keys:" );
      foreach ( String s in myCol.AllKeys )
  {
         Console.WriteLine( "   {0}", s );
      }

      // Displays the list of values of type Object.
      Console.WriteLine( "The list of values (Object):" );
      foreach ( Object o in myCol.AllValues
 )  {
         Console.WriteLine( "   {0}", o.ToString() );
      }

      // Displays the list of values of type String.
      Console.WriteLine( "The list of values (String):" );
      foreach ( String s in myCol.AllValues
 )  {
         Console.WriteLine( "   {0}", s );
      }

   }

   public static void PrintKeysAndValues(
 MyCollection myCol )  {
      for ( int i = 0; i < myCol.Count;
 i++ )  {
         Console.WriteLine( "[{0}] : {1}, {2}", i, myCol[i].Key, myCol[i].Value
 );
      }
   }

}


/*
This code produces the following output.

Initial state of the collection (Count = 3):
[0] : red, apple
[1] : yellow, banana
[2] : green, pear
The list of keys:
   red
   yellow
   green
The list of values (Object):
   apple
   banana
   pear
The list of values (String):
   apple
   banana
   pear

*/

C++

#using <System.dll>
using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;

public ref class MyCollection : public
 NameObjectCollectionBase  {

private:
   DictionaryEntry^ _de;

   // Gets a key-and-value pair (DictionaryEntry) using an index.
public:
   property DictionaryEntry^ default[ int ]
  {
      DictionaryEntry^ get(int index)  {
         _de->Key = this->BaseGetKey( index );
         _de->Value = this->BaseGet( index );
         return( _de );
      }
   }

   // Adds elements from an IDictionary into the new collection.
   MyCollection( IDictionary^ d )  {

      _de = gcnew DictionaryEntry();

      for each ( DictionaryEntry^ de in d )
  {
         this->BaseAdd( (String^) de->Key, de->Value
 );
      }
   }

   // Gets a String array that contains all the keys in the collection.
   property array<String^>^ AllKeys {
      array<String^>^ get()  {
         return( this->BaseGetAllKeys()
 );
      }
   }

   // Gets an Object array that contains all the values in the collection.
   property Array^ AllValues  {
      Array^ get()  {
         return( this->BaseGetAllValues()
 );
      }
   }

   // Gets a String array that contains all the values in the collection.
   property array<String^>^ AllStringValues  {
      array<String^>^ get()  {
         return( (array<String^>^) this->BaseGetAllValues(
 System::String::typeid ) );
      }
   }
};

public ref class SamplesNameObjectCollectionBase
  {

public:
   static void Main()  {

      // Creates and initializes a new MyCollection instance.
      IDictionary^ d = gcnew ListDictionary();
      d->Add( "red", "apple" );
      d->Add( "yellow", "banana" );
      d->Add( "green", "pear" );
      MyCollection^ myCol = gcnew MyCollection( d );
      Console::WriteLine( "Initial state of the collection (Count = {0}):",
 myCol->Count );
      PrintKeysAndValues( myCol );

      // Displays the list of keys.
      Console::WriteLine( "The list of keys:" );
      for each ( String^ s in myCol->AllKeys
 )  {
         Console::WriteLine( "   {0}", s );
      }

      // Displays the list of values of type Object.
      Console::WriteLine( "The list of values (Object):" );
      for each ( Object^ o in myCol->AllValues
 )  {
         Console::WriteLine( "   {0}", o->ToString() );
      }

      // Displays the list of values of type String.
      Console::WriteLine( "The list of values (String):" );
      for each ( String^ s in myCol->AllValues
 )  {
         Console::WriteLine( "   {0}", s );
      }
   }

public:
   static void PrintKeysAndValues( MyCollection^
 myCol )  {
      for ( int i = 0; i < myCol->Count;
 i++ )  {
         Console::WriteLine( "[{0}] : {1}, {2}", i, myCol[i]->Key, myCol[i]->Value
 );
      }
   }
};

int main()
{
    SamplesNameObjectCollectionBase::Main();
}

/*
This code produces the following output.

Initial state of the collection (Count = 3):
[0] : red, apple
[1] : yellow, banana
[2] : green, pear
The list of keys:
   red
   yellow
   green
The list of values (Object):
   apple
   banana
   pear
The list of values (String):
   apple
   banana
   pear

*/

import System.* ;
import System.Collections.* ;
import System.Collections.Specialized.* ;

public class MyCollection extends NameObjectCollectionBase
{
    private DictionaryEntry _de =  new DictionaryEntry();

    // Gets a key-and-value pair (DictionaryEntry) using an index.
    /** @property 
     */
    public DictionaryEntry get_Item(int index)
    {
        _de.set_Key(this.BaseGetKey(index));
        _de.set_Value(this.BaseGet(index));
        return _de ;
    } //get_Item

    // Adds elements from an IDictionary into the new collection.
    public MyCollection(IDictionary d)
    {        
        IDictionaryEnumerator objEnum = d.GetEnumerator();

        while (objEnum.MoveNext()) {        
            DictionaryEntry de = (DictionaryEntry)objEnum.get_Current();
            this.BaseAdd(((String)(de.get_Key())), de.get_Value());
            
        }
    } //MyCollection

    // Gets a String array that contains all the keys in the collection.
    /** @property 
     */
    public String[] get_AllKeys()
    {
        return this.BaseGetAllKeys() ;
    } //get_AllKeys

    // Gets an Object array that contains all the values in the collection.
    /** @property 
     */
    public Array get_AllValues()
    {
        return this.BaseGetAllValues() ;
    } //get_AllValues

    // Gets a String array that contains all the values in the collection.
    /** @property
     */
    public String[] get_AllStringValues()
    {
        return ((String[])(this.BaseGetAllValues(Type.GetType("System.String"))));
    } //get_AllStringValues
} //MyCollection


public class SamplesNameObjectCollectionBase
{
    public static void main(String[]
 args)
    {        
        // Creates and initializes a new MyCollection instance.
        IDictionary d = new ListDictionary();
        d.Add("red", "apple");
        d.Add("yellow", "banana");
        d.Add("green", "pear");
        MyCollection myCol =  new MyCollection(d);
        Console.WriteLine("Initial state of the collection (Count = {0}):"
,
            System.Convert.ToString(myCol.get_Count()));
        PrintKeysAndValues(myCol);
        
        // Displays the list of keys.
        Console.WriteLine("The list of keys:");
        
        String str = new String();

        for (int iCtr = 0; iCtr < myCol.get_Count();
 iCtr++) {        
            str = myCol.get_AllKeys()[iCtr];
            Console.WriteLine("   {0}", str);
        }
        
        // Displays the list of values of type Object.
        Console.WriteLine("The list of values (Object):");

        Object obj = new Object();

        for (int iCtr=0; iCtr < myCol.get_Count();
 iCtr++) {        
            obj = System.Convert.ToString(myCol.get_AllValues().get_Item(iCtr));
            Console.WriteLine("   {0}", System.Convert.ToString(obj));
        }
        
        // Displays the list of values of type String.
        Console.WriteLine("The list of values (String):");
        
        for (int iCtr =0; iCtr < myCol.get_AllValues().get_Count();
 iCtr++) {        
            str = System.Convert.ToString(myCol.get_AllValues().get_Item(iCtr));
            Console.WriteLine("   {0}", str);
        }
    } //main

    public static void PrintKeysAndValues(MyCollection
 myCol)
    {
        for (int i = 0; i < myCol.get_Count();
 i++) {        
            Console.WriteLine("[{0}] : {1}, {2}",System.Convert.ToString(i)
,
                myCol.get_Item(i).get_Key(), myCol.get_Item(i).get_Value());
        } 
    } //PrintKeysAndValues
} //SamplesNameObjectCollectionBase

/*
This code produces the following output.

Initial state of the collection (Count = 3):
[0] : red, apple
[1] : yellow, banana
[2] : green, pear
The list of keys:
   red
   yellow
   green
The list of values (Object):
   apple
   banana
   pear
The list of values (String):
   apple
   banana
   pear

*/

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
NameObjectCollectionBase クラス
NameObjectCollectionBase メンバ
System.Collections.Specialized 名前空間

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NameObjectCollectionBase.BaseGetAllKeys メソッドとは？ わかりやすく解説

NameObjectCollectionBase.BaseGetAllKeys メソッド

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NameObjectCollectionBase.BaseGetAllKeys メソッドとは？わかりやすく解説