NameObjectCollectionBase.BaseClear メソッド
アセンブリ: System (system.dll 内)




BaseClear を使用して、すべての要素を NameObjectCollectionBase から削除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 ' Clears all the elements in the collection. Public Sub Clear() Me.BaseClear() End Sub 'Clear End Class 'MyCollection Public Class SamplesNameObjectCollectionBase Public Shared Sub Main() ' Creates and initializes a new MyCollection instance. Dim d = 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) ' Removes all elements from the collection. myCol.Clear() Console.WriteLine("After clearing the collection (Count = {0}):", myCol.Count) PrintKeysAndValues(myCol) 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 'After clearing the collection (Count = 0):
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 ); } } // Clears all the elements in the collection. public void Clear() { this.BaseClear(); } } 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 ); // Removes all elements from the collection. myCol.Clear(); Console.WriteLine( "After clearing the collection (Count = {0}):", myCol.Count ); PrintKeysAndValues( myCol ); } 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 After clearing the collection (Count = 0): */
#using <system.dll> using namespace System; using namespace System::Collections; using namespace System::Collections::Specialized; public ref class MyCollection: public NameObjectCollectionBase { private: DictionaryEntry _de; public: property DictionaryEntry Item [ int ] { // Gets a key-and-value pair (DictionaryEntry) using an index. 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 ) { IEnumerator^ myEnum = d->GetEnumerator(); while ( myEnum->MoveNext() ) { DictionaryEntry^ de = safe_cast<DictionaryEntry^>(myEnum->Current); this->BaseAdd( safe_cast<String^>(de->Key), de->Value ); } } // Clears all the elements in the collection. void Clear() { this->BaseClear(); } }; static void PrintKeysAndValues( MyCollection^ myCol ) { for ( int i = 0; i < myCol->Count; i++ ) { Console::WriteLine( "[{0}] : {1}, {2}", i, myCol->Item[ i ].Key, myCol->Item[ i ].Value ); } } int 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 ); // Removes all elements from the collection. myCol->Clear(); Console::WriteLine( "After clearing the collection (Count = {0}):", myCol->Count ); PrintKeysAndValues( myCol ); } /* This code produces the following output. Initial state of the collection (Count = 3): [0] : red, apple [1] : yellow, banana [2] : green, pear After clearing the collection (Count = 0): */
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 // Clears all the elements in the collection. public void Clear() { this.BaseClear(); } //Clear } //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); // Removes all elements from the collection. myCol.Clear(); Console.WriteLine("After clearing the collection (Count = {0}):" , System.Convert.ToString(myCol.get_Count())); PrintKeysAndValues(myCol); } //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 After clearing the collection (Count = 0): */

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
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