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



指定したキーを持つ要素が NameObjectCollectionBase に格納されていない場合、NameObjectCollectionBase は変更されません。例外はスローされません。
リストなどの連続する要素のコレクションでは、空白になった位置を埋めるために、削除された要素の後にある要素の位置が繰り上げられます。インデックス付きのコレクションの場合は、移動した要素のインデックスも更新されます。この動作は、要素が概念的にバケットにグループ化されているハッシュ テーブルなどのコレクションには適用されません。

BaseRemove および BaseRemoveAt 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 ' Removes an entry with the specified key from the collection. Overloads Public Sub Remove(key As [String]) Me.BaseRemove(key) End Sub 'Remove ' Removes an entry in the specified index from the collection. Overloads Public Sub Remove(index As Integer) Me.BaseRemoveAt(index) End Sub 'Remove 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 an element at a specific index. myCol.Remove(1) Console.WriteLine("After removing the element at index 1 (Count = {0}):", myCol.Count) PrintKeysAndValues(myCol) ' Removes an element with a specific key. myCol.Remove("red") Console.WriteLine("After removing the element with the key ""red"" (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 removing the element at index 1 (Count = 2): '[0] : red, apple '[1] : green, pear 'After removing the element with the key "red" (Count = 1): '[0] : green, 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 ); } } // Removes an entry with the specified key from the collection. public void Remove( String key ) { this.BaseRemove( key ); } // Removes an entry in the specified index from the collection. public void Remove( int index ) { this.BaseRemoveAt( index ); } } 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 an element at a specific index. myCol.Remove( 1 ); Console.WriteLine( "After removing the element at index 1 (Count = {0}):", myCol.Count ); PrintKeysAndValues( myCol ); // Removes an element with a specific key. myCol.Remove( "red" ); Console.WriteLine( "After removing the element with the key \"red\" (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 removing the element at index 1 (Count = 2): [0] : red, apple [1] : green, pear After removing the element with the key "red" (Count = 1): [0] : green, 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 ); } } // Removes an entry with the specified key from the collection. void Remove( String^ key ) { this->BaseRemove( key ); } // Removes an entry in the specified index from the collection. void Remove( int index ) { this->BaseRemoveAt( index ); } }; 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 ); // Removes an element at a specific index. myCol->Remove( 1 ); Console::WriteLine( "After removing the element at index 1 (Count = {0}):", myCol->Count ); PrintKeysAndValues( myCol ); // Removes an element with a specific key. myCol->Remove( "red" ); Console::WriteLine( "After removing the element with the key \"red\" (Count = {0}):", myCol->Count ); PrintKeysAndValues( myCol ); } 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 After removing the element at index 1 (Count = 2): [0] : red, apple [1] : green, pear After removing the element with the key "red" (Count = 1): [0] : green, 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 // Removes an entry with the specified key from the collection. public void Remove(String key) { this.BaseRemove(key); } //Remove // Removes an entry in the specified index from the collection. public void Remove(int index) { this.BaseRemoveAt(index); } //Remove } //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 an element at a specific index. myCol.Remove(1); Console.WriteLine("After removing the element at index 1" + " (Count = {0}):", System.Convert.ToString(myCol.get_Count())); PrintKeysAndValues(myCol); // Removes an element with a specific key. myCol.Remove("red"); Console.WriteLine("After removing the element with the key \"red\"" + " (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 removing the element at index 1 (Count = 2): [0] : red, apple [1] : green, pear After removing the element with the key "red" (Count = 1): [0] : green, pear */

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