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
'宣言
Protected Function BaseGetAllKeys As String()
'使用
Dim returnValue As String()
returnValue = Me.BaseGetAllKeys
protected string[] BaseGetAllKeys ()
protected:
array<String^>^ BaseGetAllKeys ()
protected String[] BaseGetAllKeys ()
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。
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
*/
#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